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API DOCUMENTATION
Instead, we focus on compatibility with evergreen browsers, Node.js LTS versions and recent Safari versions. The most up-to-date reference on which runtimes and browsers we support can be found by looking at our compatibility docs. If you need to support old runtimes you cantry Sinon 9.
MATCHERS - SINON.JS
Matchers can be passed as arguments to spy.calledOn, spy.calledWith, spy.returned and thecorresponding sinon.assert functions as well as spy.withArgs. MatcheMOCKS - SINON.JS
Use a stub instead. In general you should have no more than one mock (possibly with several expectations) in a single test. Expectations implement both the spies and stubs APIs. To see what mocks look like in Sinon.JS, here is one of the PubSubJS tests again, this time using a method as callback and using mocks to verify its behavior. "testSTUBS - SINON.JS
If you want to create a stub object of MyConstructor, but don’t want the constructor to be invoked, use this utility function. var stub = sinon.createStubInstance(MyConstructor, overrides); overrides is an optional map overriding created stubs, for example: var stub = sinon.createStubInstance(MyConstructor, { foo: sinon.stub().returnsThisSPIES - SINON.JS
The first example uses the two-dimensional args array directly on the spy, while the second example fetches the first call object and then accesses its args array. Which one to use is a matter of preference, but the recommended approach is going with spy.calledWith(arg1, arg2, ) unless there’s a need to make the tests highly specific.. API. Spy objects are objects returned from sinon.spy(). FAKES - SINON.JSSEE MORE ON SINONJS.ORG ASSERTIONS - SINON.JS For instance, JsTestDriver uses global assertions, and to make Sinon.JS assertions appear alongside them, you can do. sinon.assert.expose(this); This will give you assertCalled (spy), assertCallOrder (spy1, spy2, ) and so on. The method accepts an optional options object with two options. HOW TO STUB A DEPENDENCY OF A MODULE Though in some more basic cases, you can get away with only using Sinon by modifying the module exports of the dependency. To stub a dependency (imported module) of a module under test you have to import it explicitly in your test and stub the desired method. For the stubbing to work, the stubbed method cannot be destructured, neitherin the
FAKE XHR AND SERVER
Fake XMLHttpRequest. Provides a fake implementation of XMLHttpRequest and provides several interfaces for manipulating objects created by it.. Also fakes native XMLHttpRequest and ActiveXObject (when available, and only for XMLHTTP progids). Helps with testing requests made with XHR.. The fake server and XHR can be used completely stand-alone by downloading sinon-server.js. SINON.JS - STANDALONE TEST FAKES, SPIES, STUBS AND MOCKSDOCUMENTATIONRELEASESGUIDESHOW TOSPIESSTUBS Standalone test spies, stubs and mocks for JavaScript. Works with any unit testing framework.API DOCUMENTATION
Instead, we focus on compatibility with evergreen browsers, Node.js LTS versions and recent Safari versions. The most up-to-date reference on which runtimes and browsers we support can be found by looking at our compatibility docs. If you need to support old runtimes you cantry Sinon 9.
MATCHERS - SINON.JS
Matchers can be passed as arguments to spy.calledOn, spy.calledWith, spy.returned and thecorresponding sinon.assert functions as well as spy.withArgs. MatcheMOCKS - SINON.JS
Use a stub instead. In general you should have no more than one mock (possibly with several expectations) in a single test. Expectations implement both the spies and stubs APIs. To see what mocks look like in Sinon.JS, here is one of the PubSubJS tests again, this time using a method as callback and using mocks to verify its behavior. "testSTUBS - SINON.JS
If you want to create a stub object of MyConstructor, but don’t want the constructor to be invoked, use this utility function. var stub = sinon.createStubInstance(MyConstructor, overrides); overrides is an optional map overriding created stubs, for example: var stub = sinon.createStubInstance(MyConstructor, { foo: sinon.stub().returnsThisSPIES - SINON.JS
The first example uses the two-dimensional args array directly on the spy, while the second example fetches the first call object and then accesses its args array. Which one to use is a matter of preference, but the recommended approach is going with spy.calledWith(arg1, arg2, ) unless there’s a need to make the tests highly specific.. API. Spy objects are objects returned from sinon.spy(). FAKES - SINON.JSSEE MORE ON SINONJS.ORG ASSERTIONS - SINON.JS For instance, JsTestDriver uses global assertions, and to make Sinon.JS assertions appear alongside them, you can do. sinon.assert.expose(this); This will give you assertCalled (spy), assertCallOrder (spy1, spy2, ) and so on. The method accepts an optional options object with two options. HOW TO STUB A DEPENDENCY OF A MODULE Though in some more basic cases, you can get away with only using Sinon by modifying the module exports of the dependency. To stub a dependency (imported module) of a module under test you have to import it explicitly in your test and stub the desired method. For the stubbing to work, the stubbed method cannot be destructured, neitherin the
FAKE XHR AND SERVER
Fake XMLHttpRequest. Provides a fake implementation of XMLHttpRequest and provides several interfaces for manipulating objects created by it.. Also fakes native XMLHttpRequest and ActiveXObject (when available, and only for XMLHTTP progids). Helps with testing requests made with XHR.. The fake server and XHR can be used completely stand-alone by downloading sinon-server.js.API DOCUMENTATION
Instead, we focus on compatibility with evergreen browsers, Node.js LTS versions and recent Safari versions. The most up-to-date reference on which runtimes and browsers we support can be found by looking at our compatibility docs. If you need to support old runtimes you cantry Sinon 9.
SINON.JS
inject-loader - Webpack loader that allows overriding dependencies during testing. sisyphos — utility to stub modules imported with the System.js module loader. bogus — utility for mocking dependencies when testing RequireJS based projects. fetch-mock — Mock http requests made using fetch. fake-fetch — fake window.fetch for tests.RELEASES - SINON.JS
Standalone test spies, stubs and mocks for JavaScript. Works with any unit testing framework.FAKE XHR AND SERVER
Fake XMLHttpRequest. Provides a fake implementation of XMLHttpRequest and provides several interfaces for manipulating objects created by it.. Also fakes native XMLHttpRequest and ActiveXObject (when available, and only for XMLHTTP progids). Helps with testing requests made with XHR.. The fake server and XHR can be used completely stand-alone by downloading sinon-server.js.GUIDES - SINON.JS
Standalone test spies, stubs and mocks for JavaScript. Works with any unit testing framework.GENERAL SETUP
General setup - Sinon.JS. We will be making fakes, spies and stubs. By default these are created in the default sandbox . Be sure to restore this sandbox after each test. For example, if you’re using mocha you can place this in a test file at the root level: On Mocha v8.0.0 or newer you can now add a root hook to your entire test suite, which UTILITIES - SINON.JS Sinon.JS has a few utilities used internally in lib/sinon.js. Unless the method in question is documented here, it should not be consideredpart of the publi
SPY CALL - SINON.JS
Spy call. A spy call is an object representation of an invididual call to a spied function, which could be a fake, spy, stub or mock method.. var spyCall = spy.getCall(n) Returns the nth call.Accessing individual calls helps with more detailed behavior verification when the spy is called more than once. HOW TO TEST ASYNC FUNCTIONS WITH FAKE TIMERS With fake timers (lolex), testing code that depends on timers is easier, as it sometimes becomes possible to skip the waiting part and trigger scheduled callbacks synchronously.SINON.JS
301 Moved Permanently. nginx SINON.JS - STANDALONE TEST FAKES, SPIES, STUBS AND MOCKSDOCUMENTATIONRELEASESGUIDESHOW TOSPIESSTUBS Standalone test spies, stubs and mocks for JavaScript. Works with any unit testing framework.API DOCUMENTATION
Instead, we focus on compatibility with evergreen browsers, Node.js LTS versions and recent Safari versions. The most up-to-date reference on which runtimes and browsers we support can be found by looking at our compatibility docs. If you need to support old runtimes you cantry Sinon 9.
MOCKS - SINON.JS
Use a stub instead. In general you should have no more than one mock (possibly with several expectations) in a single test. Expectations implement both the spies and stubs APIs. To see what mocks look like in Sinon.JS, here is one of the PubSubJS tests again, this time using a method as callback and using mocks to verify its behavior. "testMATCHERS - SINON.JS
Matchers can be passed as arguments to spy.calledOn, spy.calledWith, spy.returned and thecorresponding sinon.assert functions as well as spy.withArgs. MatcheSTUBS - SINON.JS
If you want to create a stub object of MyConstructor, but don’t want the constructor to be invoked, use this utility function. var stub = sinon.createStubInstance(MyConstructor, overrides); overrides is an optional map overriding created stubs, for example: var stub = sinon.createStubInstance(MyConstructor, { foo: sinon.stub().returnsThis FAKES - SINON.JSSEE MORE ON SINONJS.ORG ASSERTIONS - SINON.JS For instance, JsTestDriver uses global assertions, and to make Sinon.JS assertions appear alongside them, you can do. sinon.assert.expose(this); This will give you assertCalled (spy), assertCallOrder (spy1, spy2, ) and so on. The method accepts an optional options object with two options.SPIES - SINON.JS
The first example uses the two-dimensional args array directly on the spy, while the second example fetches the first call object and then accesses its args array. Which one to use is a matter of preference, but the recommended approach is going with spy.calledWith(arg1, arg2, ) unless there’s a need to make the tests highly specific.. API. Spy objects are objects returned from sinon.spy(). HOW TO STUB A DEPENDENCY OF A MODULE Though in some more basic cases, you can get away with only using Sinon by modifying the module exports of the dependency. To stub a dependency (imported module) of a module under test you have to import it explicitly in your test and stub the desired method. For the stubbing to work, the stubbed method cannot be destructured, neitherin the
FAKE XHR AND SERVER
Fake XMLHttpRequest. Provides a fake implementation of XMLHttpRequest and provides several interfaces for manipulating objects created by it.. Also fakes native XMLHttpRequest and ActiveXObject (when available, and only for XMLHTTP progids). Helps with testing requests made with XHR.. The fake server and XHR can be used completely stand-alone by downloading sinon-server.js. SINON.JS - STANDALONE TEST FAKES, SPIES, STUBS AND MOCKSDOCUMENTATIONRELEASESGUIDESHOW TOSPIESSTUBS Standalone test spies, stubs and mocks for JavaScript. Works with any unit testing framework.API DOCUMENTATION
Instead, we focus on compatibility with evergreen browsers, Node.js LTS versions and recent Safari versions. The most up-to-date reference on which runtimes and browsers we support can be found by looking at our compatibility docs. If you need to support old runtimes you cantry Sinon 9.
MOCKS - SINON.JS
Use a stub instead. In general you should have no more than one mock (possibly with several expectations) in a single test. Expectations implement both the spies and stubs APIs. To see what mocks look like in Sinon.JS, here is one of the PubSubJS tests again, this time using a method as callback and using mocks to verify its behavior. "testMATCHERS - SINON.JS
Matchers can be passed as arguments to spy.calledOn, spy.calledWith, spy.returned and thecorresponding sinon.assert functions as well as spy.withArgs. MatcheSTUBS - SINON.JS
If you want to create a stub object of MyConstructor, but don’t want the constructor to be invoked, use this utility function. var stub = sinon.createStubInstance(MyConstructor, overrides); overrides is an optional map overriding created stubs, for example: var stub = sinon.createStubInstance(MyConstructor, { foo: sinon.stub().returnsThis FAKES - SINON.JSSEE MORE ON SINONJS.ORG ASSERTIONS - SINON.JS For instance, JsTestDriver uses global assertions, and to make Sinon.JS assertions appear alongside them, you can do. sinon.assert.expose(this); This will give you assertCalled (spy), assertCallOrder (spy1, spy2, ) and so on. The method accepts an optional options object with two options.SPIES - SINON.JS
The first example uses the two-dimensional args array directly on the spy, while the second example fetches the first call object and then accesses its args array. Which one to use is a matter of preference, but the recommended approach is going with spy.calledWith(arg1, arg2, ) unless there’s a need to make the tests highly specific.. API. Spy objects are objects returned from sinon.spy(). HOW TO STUB A DEPENDENCY OF A MODULE Though in some more basic cases, you can get away with only using Sinon by modifying the module exports of the dependency. To stub a dependency (imported module) of a module under test you have to import it explicitly in your test and stub the desired method. For the stubbing to work, the stubbed method cannot be destructured, neitherin the
FAKE XHR AND SERVER
Fake XMLHttpRequest. Provides a fake implementation of XMLHttpRequest and provides several interfaces for manipulating objects created by it.. Also fakes native XMLHttpRequest and ActiveXObject (when available, and only for XMLHTTP progids). Helps with testing requests made with XHR.. The fake server and XHR can be used completely stand-alone by downloading sinon-server.js.SINON.JS
inject-loader - Webpack loader that allows overriding dependencies during testing. sisyphos — utility to stub modules imported with the System.js module loader. bogus — utility for mocking dependencies when testing RequireJS based projects. fetch-mock — Mock http requests made using fetch. fake-fetch — fake window.fetch for tests.API DOCUMENTATION
Instead, we focus on compatibility with evergreen browsers, Node.js LTS versions and recent Safari versions. The most up-to-date reference on which runtimes and browsers we support can be found by looking at our compatibility docs. If you need to support old runtimes you cantry Sinon 9.
RELEASES - SINON.JS
Standalone test spies, stubs and mocks for JavaScript. Works with any unit testing framework.GUIDES - SINON.JS
Standalone test spies, stubs and mocks for JavaScript. Works with any unit testing framework.FAKE XHR AND SERVER
Fake XMLHttpRequest. Provides a fake implementation of XMLHttpRequest and provides several interfaces for manipulating objects created by it.. Also fakes native XMLHttpRequest and ActiveXObject (when available, and only for XMLHTTP progids). Helps with testing requests made with XHR.. The fake server and XHR can be used completely stand-alone by downloading sinon-server.js.FAKE TIMERS
Fake timers are synchronous implementations of setTimeout and friends that Sinon.JS can overwrite the global functions with to allow you to more easily test code using them.. Fake timers provide a clock object to pass time, which can also be used to control Date objects created through either new Date(); or Date.now(); (if supported by the browser).. For standalone usage of fake timers it isSPY CALL - SINON.JS
Spy call. A spy call is an object representation of an invididual call to a spied function, which could be a fake, spy, stub or mock method.. var spyCall = spy.getCall(n) Returns the nth call.Accessing individual calls helps with more detailed behavior verification when the spy is called more than once. UTILITIES - SINON.JS Sinon.JS has a few utilities used internally in lib/sinon.js. Unless the method in question is documented here, it should not be consideredpart of the publi
GENERAL SETUP
General setup - Sinon.JS. We will be making fakes, spies and stubs. By default these are created in the default sandbox . Be sure to restore this sandbox after each test. For example, if you’re using mocha you can place this in a test file at the root level: On Mocha v8.0.0 or newer you can now add a root hook to your entire test suite, whichSINON.JS
301 Moved Permanently. nginx SINON.JS - STANDALONE TEST FAKES, SPIES, STUBS AND MOCKSDOCUMENTATIONRELEASESGUIDESHOW TOSPIESSTUBS Standalone test spies, stubs and mocks for JavaScript. Works with any unit testing framework.API DOCUMENTATION
Instead, we focus on compatibility with evergreen browsers, Node.js LTS versions and recent Safari versions. The most up-to-date reference on which runtimes and browsers we support can be found by looking at our compatibility docs. If you need to support old runtimes you cantry Sinon 9.
MOCKS - SINON.JS
Use a stub instead. In general you should have no more than one mock (possibly with several expectations) in a single test. Expectations implement both the spies and stubs APIs. To see what mocks look like in Sinon.JS, here is one of the PubSubJS tests again, this time using a method as callback and using mocks to verify its behavior. "testMATCHERS - SINON.JS
Matchers can be passed as arguments to spy.calledOn, spy.calledWith, spy.returned and thecorresponding sinon.assert functions as well as spy.withArgs. MatcheSTUBS - SINON.JS
If you want to create a stub object of MyConstructor, but don’t want the constructor to be invoked, use this utility function. var stub = sinon.createStubInstance(MyConstructor, overrides); overrides is an optional map overriding created stubs, for example: var stub = sinon.createStubInstance(MyConstructor, { foo: sinon.stub().returnsThis ASSERTIONS - SINON.JS For instance, JsTestDriver uses global assertions, and to make Sinon.JS assertions appear alongside them, you can do. sinon.assert.expose(this); This will give you assertCalled (spy), assertCallOrder (spy1, spy2, ) and so on. The method accepts an optional options object with two options. FAKES - SINON.JSSEE MORE ON SINONJS.ORGSPIES - SINON.JS
The first example uses the two-dimensional args array directly on the spy, while the second example fetches the first call object and then accesses its args array. Which one to use is a matter of preference, but the recommended approach is going with spy.calledWith(arg1, arg2, ) unless there’s a need to make the tests highly specific.. API. Spy objects are objects returned from sinon.spy().FAKE XHR AND SERVER
Fake XMLHttpRequest. Provides a fake implementation of XMLHttpRequest and provides several interfaces for manipulating objects created by it.. Also fakes native XMLHttpRequest and ActiveXObject (when available, and only for XMLHTTP progids). Helps with testing requests made with XHR.. The fake server and XHR can be used completely stand-alone by downloading sinon-server.js. HOW TO STUB A DEPENDENCY OF A MODULE Though in some more basic cases, you can get away with only using Sinon by modifying the module exports of the dependency. To stub a dependency (imported module) of a module under test you have to import it explicitly in your test and stub the desired method. For the stubbing to work, the stubbed method cannot be destructured, neitherin the
SINON.JS - STANDALONE TEST FAKES, SPIES, STUBS AND MOCKSDOCUMENTATIONRELEASESGUIDESHOW TOSPIESSTUBS Standalone test spies, stubs and mocks for JavaScript. Works with any unit testing framework.API DOCUMENTATION
Instead, we focus on compatibility with evergreen browsers, Node.js LTS versions and recent Safari versions. The most up-to-date reference on which runtimes and browsers we support can be found by looking at our compatibility docs. If you need to support old runtimes you cantry Sinon 9.
MOCKS - SINON.JS
Use a stub instead. In general you should have no more than one mock (possibly with several expectations) in a single test. Expectations implement both the spies and stubs APIs. To see what mocks look like in Sinon.JS, here is one of the PubSubJS tests again, this time using a method as callback and using mocks to verify its behavior. "testMATCHERS - SINON.JS
Matchers can be passed as arguments to spy.calledOn, spy.calledWith, spy.returned and thecorresponding sinon.assert functions as well as spy.withArgs. MatcheSTUBS - SINON.JS
If you want to create a stub object of MyConstructor, but don’t want the constructor to be invoked, use this utility function. var stub = sinon.createStubInstance(MyConstructor, overrides); overrides is an optional map overriding created stubs, for example: var stub = sinon.createStubInstance(MyConstructor, { foo: sinon.stub().returnsThis ASSERTIONS - SINON.JS For instance, JsTestDriver uses global assertions, and to make Sinon.JS assertions appear alongside them, you can do. sinon.assert.expose(this); This will give you assertCalled (spy), assertCallOrder (spy1, spy2, ) and so on. The method accepts an optional options object with two options. FAKES - SINON.JSSEE MORE ON SINONJS.ORGSPIES - SINON.JS
The first example uses the two-dimensional args array directly on the spy, while the second example fetches the first call object and then accesses its args array. Which one to use is a matter of preference, but the recommended approach is going with spy.calledWith(arg1, arg2, ) unless there’s a need to make the tests highly specific.. API. Spy objects are objects returned from sinon.spy().FAKE XHR AND SERVER
Fake XMLHttpRequest. Provides a fake implementation of XMLHttpRequest and provides several interfaces for manipulating objects created by it.. Also fakes native XMLHttpRequest and ActiveXObject (when available, and only for XMLHTTP progids). Helps with testing requests made with XHR.. The fake server and XHR can be used completely stand-alone by downloading sinon-server.js. HOW TO STUB A DEPENDENCY OF A MODULE Though in some more basic cases, you can get away with only using Sinon by modifying the module exports of the dependency. To stub a dependency (imported module) of a module under test you have to import it explicitly in your test and stub the desired method. For the stubbing to work, the stubbed method cannot be destructured, neitherin the
SINON.JS - STANDALONE TEST FAKES, SPIES, STUBS AND MOCKS Standalone test spies, stubs and mocks for JavaScript. Works with any unit testing framework.API DOCUMENTATION
Instead, we focus on compatibility with evergreen browsers, Node.js LTS versions and recent Safari versions. The most up-to-date reference on which runtimes and browsers we support can be found by looking at our compatibility docs. If you need to support old runtimes you cantry Sinon 9.
SINON.JS
inject-loader - Webpack loader that allows overriding dependencies during testing. sisyphos — utility to stub modules imported with the System.js module loader. bogus — utility for mocking dependencies when testing RequireJS based projects. fetch-mock — Mock http requests made using fetch. fake-fetch — fake window.fetch for tests.RELEASES - SINON.JS
Standalone test spies, stubs and mocks for JavaScript. Works with any unit testing framework.GUIDES - SINON.JS
Standalone test spies, stubs and mocks for JavaScript. Works with any unit testing framework.FAKE TIMERS
Fake timers are synchronous implementations of setTimeout and friends that Sinon.JS can overwrite the global functions with to allow you to more easily test code using them.. Fake timers provide a clock object to pass time, which can also be used to control Date objects created through either new Date(); or Date.now(); (if supported by the browser).. For standalone usage of fake timers it isSPY CALL - SINON.JS
Spy call. A spy call is an object representation of an invididual call to a spied function, which could be a fake, spy, stub or mock method.. var spyCall = spy.getCall(n) Returns the nth call.Accessing individual calls helps with more detailed behavior verification when the spy is called more than once.GENERAL SETUP
General setup - Sinon.JS. We will be making fakes, spies and stubs. By default these are created in the default sandbox . Be sure to restore this sandbox after each test. For example, if you’re using mocha you can place this in a test file at the root level: On Mocha v8.0.0 or newer you can now add a root hook to your entire test suite, which UTILITIES - SINON.JS Sinon.JS has a few utilities used internally in lib/sinon.js. Unless the method in question is documented here, it should not be consideredpart of the publi
SINONJS.ORG
301 Moved Permanently. nginx SINON.JS - STANDALONE TEST FAKES, SPIES, STUBS AND MOCKSDOCUMENTATIONRELEASESGUIDESHOW TOSPIESSTUBS Standalone test spies, stubs and mocks for JavaScript. Works with any unit testing framework.API DOCUMENTATION
Instead, we focus on compatibility with evergreen browsers, Node.js LTS versions and recent Safari versions. The most up-to-date reference on which runtimes and browsers we support can be found by looking at our compatibility docs. If you need to support old runtimes you cantry Sinon 9.
SPIES - SINON.JS
The first example uses the two-dimensional args array directly on the spy, while the second example fetches the first call object and then accesses its args array. Which one to use is a matter of preference, but the recommended approach is going with spy.calledWith(arg1, arg2, ) unless there’s a need to make the tests highly specific.. API. Spy objects are objects returned from sinon.spy().MATCHERS - SINON.JS
Matchers can be passed as arguments to spy.calledOn, spy.calledWith, spy.returned and thecorresponding sinon.assert functions as well as spy.withArgs. MatcheMOCKS - SINON.JS
Use a stub instead. In general you should have no more than one mock (possibly with several expectations) in a single test. Expectations implement both the spies and stubs APIs. To see what mocks look like in Sinon.JS, here is one of the PubSubJS tests again, this time using a method as callback and using mocks to verify its behavior. "testSTUBS - SINON.JS
If you want to create a stub object of MyConstructor, but don’t want the constructor to be invoked, use this utility function. var stub = sinon.createStubInstance(MyConstructor, overrides); overrides is an optional map overriding created stubs, for example: var stub = sinon.createStubInstance(MyConstructor, { foo: sinon.stub().returnsThis FAKES - SINON.JSSEE MORE ON SINONJS.ORG ASSERTIONS - SINON.JS For instance, JsTestDriver uses global assertions, and to make Sinon.JS assertions appear alongside them, you can do. sinon.assert.expose(this); This will give you assertCalled (spy), assertCallOrder (spy1, spy2, ) and so on. The method accepts an optional options object with two options.FAKE XHR AND SERVER
Fake XMLHttpRequest. Provides a fake implementation of XMLHttpRequest and provides several interfaces for manipulating objects created by it.. Also fakes native XMLHttpRequest and ActiveXObject (when available, and only for XMLHTTP progids). Helps with testing requests made with XHR.. The fake server and XHR can be used completely stand-alone by downloading sinon-server.js. HOW TO STUB A DEPENDENCY OF A MODULE Though in some more basic cases, you can get away with only using Sinon by modifying the module exports of the dependency. To stub a dependency (imported module) of a module under test you have to import it explicitly in your test and stub the desired method. For the stubbing to work, the stubbed method cannot be destructured, neitherin the
SINON.JS - STANDALONE TEST FAKES, SPIES, STUBS AND MOCKSDOCUMENTATIONRELEASESGUIDESHOW TOSPIESSTUBS Standalone test spies, stubs and mocks for JavaScript. Works with any unit testing framework.API DOCUMENTATION
Instead, we focus on compatibility with evergreen browsers, Node.js LTS versions and recent Safari versions. The most up-to-date reference on which runtimes and browsers we support can be found by looking at our compatibility docs. If you need to support old runtimes you cantry Sinon 9.
SPIES - SINON.JS
The first example uses the two-dimensional args array directly on the spy, while the second example fetches the first call object and then accesses its args array. Which one to use is a matter of preference, but the recommended approach is going with spy.calledWith(arg1, arg2, ) unless there’s a need to make the tests highly specific.. API. Spy objects are objects returned from sinon.spy().MATCHERS - SINON.JS
Matchers can be passed as arguments to spy.calledOn, spy.calledWith, spy.returned and thecorresponding sinon.assert functions as well as spy.withArgs. MatcheMOCKS - SINON.JS
Use a stub instead. In general you should have no more than one mock (possibly with several expectations) in a single test. Expectations implement both the spies and stubs APIs. To see what mocks look like in Sinon.JS, here is one of the PubSubJS tests again, this time using a method as callback and using mocks to verify its behavior. "testSTUBS - SINON.JS
If you want to create a stub object of MyConstructor, but don’t want the constructor to be invoked, use this utility function. var stub = sinon.createStubInstance(MyConstructor, overrides); overrides is an optional map overriding created stubs, for example: var stub = sinon.createStubInstance(MyConstructor, { foo: sinon.stub().returnsThis FAKES - SINON.JSSEE MORE ON SINONJS.ORG ASSERTIONS - SINON.JS For instance, JsTestDriver uses global assertions, and to make Sinon.JS assertions appear alongside them, you can do. sinon.assert.expose(this); This will give you assertCalled (spy), assertCallOrder (spy1, spy2, ) and so on. The method accepts an optional options object with two options.FAKE XHR AND SERVER
Fake XMLHttpRequest. Provides a fake implementation of XMLHttpRequest and provides several interfaces for manipulating objects created by it.. Also fakes native XMLHttpRequest and ActiveXObject (when available, and only for XMLHTTP progids). Helps with testing requests made with XHR.. The fake server and XHR can be used completely stand-alone by downloading sinon-server.js. HOW TO STUB A DEPENDENCY OF A MODULE Though in some more basic cases, you can get away with only using Sinon by modifying the module exports of the dependency. To stub a dependency (imported module) of a module under test you have to import it explicitly in your test and stub the desired method. For the stubbing to work, the stubbed method cannot be destructured, neitherin the
API DOCUMENTATION
Instead, we focus on compatibility with evergreen browsers, Node.js LTS versions and recent Safari versions. The most up-to-date reference on which runtimes and browsers we support can be found by looking at our compatibility docs. If you need to support old runtimes you cantry Sinon 9.
SINON.JS
inject-loader - Webpack loader that allows overriding dependencies during testing. sisyphos — utility to stub modules imported with the System.js module loader. bogus — utility for mocking dependencies when testing RequireJS based projects. fetch-mock — Mock http requests made using fetch. fake-fetch — fake window.fetch for tests.RELEASES - SINON.JS
Standalone test spies, stubs and mocks for JavaScript. Works with any unit testing framework.GUIDES - SINON.JS
Standalone test spies, stubs and mocks for JavaScript. Works with any unit testing framework.FAKE TIMERS
Fake timers are synchronous implementations of setTimeout and friends that Sinon.JS can overwrite the global functions with to allow you to more easily test code using them.. Fake timers provide a clock object to pass time, which can also be used to control Date objects created through either new Date(); or Date.now(); (if supported by the browser).. For standalone usage of fake timers it is UTILITIES - SINON.JS Sinon.JS has a few utilities used internally in lib/sinon.js. Unless the method in question is documented here, it should not be consideredpart of the publi
SPY CALL - SINON.JS
Spy call. A spy call is an object representation of an invididual call to a spied function, which could be a fake, spy, stub or mock method.. var spyCall = spy.getCall(n) Returns the nth call.Accessing individual calls helps with more detailed behavior verification when the spy is called more than once.GENERAL SETUP
General setup - Sinon.JS. We will be making fakes, spies and stubs. By default these are created in the default sandbox . Be sure to restore this sandbox after each test. For example, if you’re using mocha you can place this in a test file at the root level: On Mocha v8.0.0 or newer you can now add a root hook to your entire test suite, which HOW TO TEST ASYNC FUNCTIONS WITH FAKE TIMERS With fake timers (lolex), testing code that depends on timers is easier, as it sometimes becomes possible to skip the waiting part and trigger scheduled callbacks synchronously.SINONJS.ORG
301 Moved Permanently. nginx SINON.JS - STANDALONE TEST FAKES, SPIES, STUBS AND MOCKSDOCUMENTATIONRELEASESGUIDESHOW TOSPIESSTUBS Standalone test spies, stubs and mocks for JavaScript. Works with any unit testing framework.API DOCUMENTATION
Instead, we focus on compatibility with evergreen browsers, Node.js LTS versions and recent Safari versions. The most up-to-date reference on which runtimes and browsers we support can be found by looking at our compatibility docs. If you need to support old runtimes you cantry Sinon 9.
MATCHERS - SINON.JS
Matchers can be passed as arguments to spy.calledOn, spy.calledWith, spy.returned and thecorresponding sinon.assert functions as well as spy.withArgs. MatcheSPIES - SINON.JS
The first example uses the two-dimensional args array directly on the spy, while the second example fetches the first call object and then accesses its args array. Which one to use is a matter of preference, but the recommended approach is going with spy.calledWith(arg1, arg2, ) unless there’s a need to make the tests highly specific.. API. Spy objects are objects returned from sinon.spy().MOCKS - SINON.JS
Use a stub instead. In general you should have no more than one mock (possibly with several expectations) in a single test. Expectations implement both the spies and stubs APIs. To see what mocks look like in Sinon.JS, here is one of the PubSubJS tests again, this time using a method as callback and using mocks to verify its behavior. "test FAKES - SINON.JSSEE MORE ON SINONJS.ORGSTUBS - SINON.JS
If you want to create a stub object of MyConstructor, but don’t want the constructor to be invoked, use this utility function. var stub = sinon.createStubInstance(MyConstructor, overrides); overrides is an optional map overriding created stubs, for example: var stub = sinon.createStubInstance(MyConstructor, { foo: sinon.stub().returnsThis ASSERTIONS - SINON.JS For instance, JsTestDriver uses global assertions, and to make Sinon.JS assertions appear alongside them, you can do. sinon.assert.expose(this); This will give you assertCalled (spy), assertCallOrder (spy1, spy2, ) and so on. The method accepts an optional options object with two options.FAKE XHR AND SERVER
Fake XMLHttpRequest. Provides a fake implementation of XMLHttpRequest and provides several interfaces for manipulating objects created by it.. Also fakes native XMLHttpRequest and ActiveXObject (when available, and only for XMLHTTP progids). Helps with testing requests made with XHR.. The fake server and XHR can be used completely stand-alone by downloading sinon-server.js. HOW TO STUB A DEPENDENCY OF A MODULE Though in some more basic cases, you can get away with only using Sinon by modifying the module exports of the dependency. To stub a dependency (imported module) of a module under test you have to import it explicitly in your test and stub the desired method. For the stubbing to work, the stubbed method cannot be destructured, neitherin the
SINON.JS - STANDALONE TEST FAKES, SPIES, STUBS AND MOCKSDOCUMENTATIONRELEASESGUIDESHOW TOSPIESSTUBS Standalone test spies, stubs and mocks for JavaScript. Works with any unit testing framework.API DOCUMENTATION
Instead, we focus on compatibility with evergreen browsers, Node.js LTS versions and recent Safari versions. The most up-to-date reference on which runtimes and browsers we support can be found by looking at our compatibility docs. If you need to support old runtimes you cantry Sinon 9.
MATCHERS - SINON.JS
Matchers can be passed as arguments to spy.calledOn, spy.calledWith, spy.returned and thecorresponding sinon.assert functions as well as spy.withArgs. MatcheSPIES - SINON.JS
The first example uses the two-dimensional args array directly on the spy, while the second example fetches the first call object and then accesses its args array. Which one to use is a matter of preference, but the recommended approach is going with spy.calledWith(arg1, arg2, ) unless there’s a need to make the tests highly specific.. API. Spy objects are objects returned from sinon.spy().MOCKS - SINON.JS
Use a stub instead. In general you should have no more than one mock (possibly with several expectations) in a single test. Expectations implement both the spies and stubs APIs. To see what mocks look like in Sinon.JS, here is one of the PubSubJS tests again, this time using a method as callback and using mocks to verify its behavior. "test FAKES - SINON.JSSEE MORE ON SINONJS.ORGSTUBS - SINON.JS
If you want to create a stub object of MyConstructor, but don’t want the constructor to be invoked, use this utility function. var stub = sinon.createStubInstance(MyConstructor, overrides); overrides is an optional map overriding created stubs, for example: var stub = sinon.createStubInstance(MyConstructor, { foo: sinon.stub().returnsThis ASSERTIONS - SINON.JS For instance, JsTestDriver uses global assertions, and to make Sinon.JS assertions appear alongside them, you can do. sinon.assert.expose(this); This will give you assertCalled (spy), assertCallOrder (spy1, spy2, ) and so on. The method accepts an optional options object with two options.FAKE XHR AND SERVER
Fake XMLHttpRequest. Provides a fake implementation of XMLHttpRequest and provides several interfaces for manipulating objects created by it.. Also fakes native XMLHttpRequest and ActiveXObject (when available, and only for XMLHTTP progids). Helps with testing requests made with XHR.. The fake server and XHR can be used completely stand-alone by downloading sinon-server.js. HOW TO STUB A DEPENDENCY OF A MODULE Though in some more basic cases, you can get away with only using Sinon by modifying the module exports of the dependency. To stub a dependency (imported module) of a module under test you have to import it explicitly in your test and stub the desired method. For the stubbing to work, the stubbed method cannot be destructured, neitherin the
API DOCUMENTATION
Instead, we focus on compatibility with evergreen browsers, Node.js LTS versions and recent Safari versions. The most up-to-date reference on which runtimes and browsers we support can be found by looking at our compatibility docs. If you need to support old runtimes you cantry Sinon 9.
SINON.JS
inject-loader - Webpack loader that allows overriding dependencies during testing. sisyphos — utility to stub modules imported with the System.js module loader. bogus — utility for mocking dependencies when testing RequireJS based projects. fetch-mock — Mock http requests made using fetch. fake-fetch — fake window.fetch for tests.RELEASES - SINON.JS
Standalone test spies, stubs and mocks for JavaScript. Works with any unit testing framework.GUIDES - SINON.JS
Standalone test spies, stubs and mocks for JavaScript. Works with any unit testing framework.FAKE TIMERS
Fake timers are synchronous implementations of setTimeout and friends that Sinon.JS can overwrite the global functions with to allow you to more easily test code using them.. Fake timers provide a clock object to pass time, which can also be used to control Date objects created through either new Date(); or Date.now(); (if supported by the browser).. For standalone usage of fake timers it isSPY CALL - SINON.JS
Spy call. A spy call is an object representation of an invididual call to a spied function, which could be a fake, spy, stub or mock method.. var spyCall = spy.getCall(n) Returns the nth call.Accessing individual calls helps with more detailed behavior verification when the spy is called more than once. UTILITIES - SINON.JS Sinon.JS has a few utilities used internally in lib/sinon.js. Unless the method in question is documented here, it should not be consideredpart of the publi
GENERAL SETUP
General setup - Sinon.JS. We will be making fakes, spies and stubs. By default these are created in the default sandbox . Be sure to restore this sandbox after each test. For example, if you’re using mocha you can place this in a test file at the root level: On Mocha v8.0.0 or newer you can now add a root hook to your entire test suite, which HOW TO TEST ASYNC FUNCTIONS WITH FAKE TIMERS With fake timers (lolex), testing code that depends on timers is easier, as it sometimes becomes possible to skip the waiting part and trigger scheduled callbacks synchronously.SINONJS.ORG
301 Moved Permanently. nginx SINON.JS - STANDALONE TEST FAKES, SPIES, STUBS AND MOCKSDOCUMENTATIONRELEASESGUIDESHOW TOSPIESSTUBS Standalone test spies, stubs and mocks for JavaScript. Works with any unit testing framework.API DOCUMENTATION
Instead, we focus on compatibility with evergreen browsers, Node.js LTS versions and recent Safari versions. The most up-to-date reference on which runtimes and browsers we support can be found by looking at our compatibility docs. If you need to support old runtimes you cantry Sinon 9.
MOCKS - SINON.JS
Use a stub instead. In general you should have no more than one mock (possibly with several expectations) in a single test. Expectations implement both the spies and stubs APIs. To see what mocks look like in Sinon.JS, here is one of the PubSubJS tests again, this time using a method as callback and using mocks to verify its behavior. "test ASSERTIONS - SINON.JS For instance, JsTestDriver uses global assertions, and to make Sinon.JS assertions appear alongside them, you can do. sinon.assert.expose(this); This will give you assertCalled (spy), assertCallOrder (spy1, spy2, ) and so on. The method accepts an optional options object with two options.MATCHERS - SINON.JS
Matchers can be passed as arguments to spy.calledOn, spy.calledWith, spy.returned and thecorresponding sinon.assert functions as well as spy.withArgs. Matche FAKES - SINON.JSSEE MORE ON SINONJS.ORGSPIES - SINON.JS
The first example uses the two-dimensional args array directly on the spy, while the second example fetches the first call object and then accesses its args array. Which one to use is a matter of preference, but the recommended approach is going with spy.calledWith(arg1, arg2, ) unless there’s a need to make the tests highly specific.. API. Spy objects are objects returned from sinon.spy().STUBS - SINON.JS
If you want to create a stub object of MyConstructor, but don’t want the constructor to be invoked, use this utility function. var stub = sinon.createStubInstance(MyConstructor, overrides); overrides is an optional map overriding created stubs, for example: var stub = sinon.createStubInstance(MyConstructor, { foo: sinon.stub().returnsThisFAKE XHR AND SERVER
Fake XMLHttpRequest. Provides a fake implementation of XMLHttpRequest and provides several interfaces for manipulating objects created by it.. Also fakes native XMLHttpRequest and ActiveXObject (when available, and only for XMLHTTP progids). Helps with testing requests made with XHR.. The fake server and XHR can be used completely stand-alone by downloading sinon-server.js. HOW TO STUB A DEPENDENCY OF A MODULE Though in some more basic cases, you can get away with only using Sinon by modifying the module exports of the dependency. To stub a dependency (imported module) of a module under test you have to import it explicitly in your test and stub the desired method. For the stubbing to work, the stubbed method cannot be destructured, neitherin the
SINON.JS - STANDALONE TEST FAKES, SPIES, STUBS AND MOCKSDOCUMENTATIONRELEASESGUIDESHOW TOSPIESSTUBS Standalone test spies, stubs and mocks for JavaScript. Works with any unit testing framework.API DOCUMENTATION
Instead, we focus on compatibility with evergreen browsers, Node.js LTS versions and recent Safari versions. The most up-to-date reference on which runtimes and browsers we support can be found by looking at our compatibility docs. If you need to support old runtimes you cantry Sinon 9.
MOCKS - SINON.JS
Use a stub instead. In general you should have no more than one mock (possibly with several expectations) in a single test. Expectations implement both the spies and stubs APIs. To see what mocks look like in Sinon.JS, here is one of the PubSubJS tests again, this time using a method as callback and using mocks to verify its behavior. "test ASSERTIONS - SINON.JS For instance, JsTestDriver uses global assertions, and to make Sinon.JS assertions appear alongside them, you can do. sinon.assert.expose(this); This will give you assertCalled (spy), assertCallOrder (spy1, spy2, ) and so on. The method accepts an optional options object with two options.MATCHERS - SINON.JS
Matchers can be passed as arguments to spy.calledOn, spy.calledWith, spy.returned and thecorresponding sinon.assert functions as well as spy.withArgs. Matche FAKES - SINON.JSSEE MORE ON SINONJS.ORGSPIES - SINON.JS
The first example uses the two-dimensional args array directly on the spy, while the second example fetches the first call object and then accesses its args array. Which one to use is a matter of preference, but the recommended approach is going with spy.calledWith(arg1, arg2, ) unless there’s a need to make the tests highly specific.. API. Spy objects are objects returned from sinon.spy().STUBS - SINON.JS
If you want to create a stub object of MyConstructor, but don’t want the constructor to be invoked, use this utility function. var stub = sinon.createStubInstance(MyConstructor, overrides); overrides is an optional map overriding created stubs, for example: var stub = sinon.createStubInstance(MyConstructor, { foo: sinon.stub().returnsThisFAKE XHR AND SERVER
Fake XMLHttpRequest. Provides a fake implementation of XMLHttpRequest and provides several interfaces for manipulating objects created by it.. Also fakes native XMLHttpRequest and ActiveXObject (when available, and only for XMLHTTP progids). Helps with testing requests made with XHR.. The fake server and XHR can be used completely stand-alone by downloading sinon-server.js. HOW TO STUB A DEPENDENCY OF A MODULE Though in some more basic cases, you can get away with only using Sinon by modifying the module exports of the dependency. To stub a dependency (imported module) of a module under test you have to import it explicitly in your test and stub the desired method. For the stubbing to work, the stubbed method cannot be destructured, neitherin the
API DOCUMENTATION
Instead, we focus on compatibility with evergreen browsers, Node.js LTS versions and recent Safari versions. The most up-to-date reference on which runtimes and browsers we support can be found by looking at our compatibility docs. If you need to support old runtimes you cantry Sinon 9.
SINON.JS
inject-loader - Webpack loader that allows overriding dependencies during testing. sisyphos — utility to stub modules imported with the System.js module loader. bogus — utility for mocking dependencies when testing RequireJS based projects. fetch-mock — Mock http requests made using fetch. fake-fetch — fake window.fetch for tests.FAKE XHR AND SERVER
Fake XMLHttpRequest. Provides a fake implementation of XMLHttpRequest and provides several interfaces for manipulating objects created by it.. Also fakes native XMLHttpRequest and ActiveXObject (when available, and only for XMLHTTP progids). Helps with testing requests made with XHR.. The fake server and XHR can be used completely stand-alone by downloading sinon-server.js.RELEASES - SINON.JS
Standalone test spies, stubs and mocks for JavaScript. Works with any unit testing framework.GUIDES - SINON.JS
Standalone test spies, stubs and mocks for JavaScript. Works with any unit testing framework.FAKE TIMERS
Fake timers are synchronous implementations of setTimeout and friends that Sinon.JS can overwrite the global functions with to allow you to more easily test code using them.. Fake timers provide a clock object to pass time, which can also be used to control Date objects created through either new Date(); or Date.now(); (if supported by the browser).. For standalone usage of fake timers it isSPY CALL - SINON.JS
Spy call. A spy call is an object representation of an invididual call to a spied function, which could be a fake, spy, stub or mock method.. var spyCall = spy.getCall(n) Returns the nth call.Accessing individual calls helps with more detailed behavior verification when the spy is called more than once. UTILITIES - SINON.JS Sinon.JS has a few utilities used internally in lib/sinon.js. Unless the method in question is documented here, it should not be consideredpart of the publi
GENERAL SETUP
General setup - Sinon.JS. We will be making fakes, spies and stubs. By default these are created in the default sandbox . Be sure to restore this sandbox after each test. For example, if you’re using mocha you can place this in a test file at the root level: On Mocha v8.0.0 or newer you can now add a root hook to your entire test suite, whichSINONJS.ORG
301 Moved Permanently. nginx SINON.JS - STANDALONE TEST FAKES, SPIES, STUBS AND MOCKSDOCUMENTATIONRELEASESGUIDESHOW TOSPIESSTUBS Standalone test spies, stubs and mocks for JavaScript. Works with any unit testing framework.API DOCUMENTATION
API documentation - Sinon.JS - v11.1.1 This page contains the entire Sinon.JS API documentation along with brief introductions to the concepts Sinon implements.STUBS - SINON.JS
There are methods onFirstCall, onSecondCall,onThirdCall to make stub definitions read more naturally.. onCall can be combined with all of the behavior defining methods in this section. In particular, it can be used together with withArgs.MOCKS - SINON.JS
Introduction What are mocks? Mocks (and mock expectations) are fake methods (like spies) with pre-programmed behavior (like stubs) as well as pre-programmed expectations.. A mock will fail your test if it is not used as expected. MATCHERS - SINON.JSNPM SINONSINON ASSERT Matchers can be passed as arguments to spy.calledOn, spy.calledWith, spy.returned and thecorresponding sinon.assert functions as well as spy.withArgs. Matche ASSERTIONS - SINON.JS Sinon.JS ships with a set of assertions that mirror most behavior verification methods and properties on spies and stubs. The advantage of using the assertioSPIES - SINON.JS
The first example uses the two-dimensional args array directly on the spy, while the second example fetches the first call object and then accesses its args array. Which one to use is a matter of preference, but the recommended approach is going with spy.calledWith(arg1, arg2, ) unless there’s a need to make the tests highly specific.. API. Spy objects are objects returned from sinon.spy().FAKES - SINON.JS
Introduction. fake is available in Sinon from v5 onwards. It allows creation of a fake Function with the ability to set a default behavior.The available behaviors for the most part match the API of a sinon.stub.. In Sinon, a fake is a Function that records arguments, return value, the value of this and exception thrown (if any) for all of its calls.. A fake is immutable: once created, theFAKE XHR AND SERVER
Fake XMLHttpRequest. Provides a fake implementation of XMLHttpRequest and provides several interfaces for manipulating objects created by it.. Also fakes native XMLHttpRequest and ActiveXObject (when available, and only for XMLHTTP progids). Helps with testing requests made with XHR.. The fake server and XHR can be used completely stand-alone by downloading sinon-server.js. HOW TO STUB A DEPENDENCY OF A MODULE Sinon is a stubbing library, not a module interception library. Stubbing dependencies is highly dependant on your enviroment and the implementation. For Node SINON.JS - STANDALONE TEST FAKES, SPIES, STUBS AND MOCKSDOCUMENTATIONRELEASESGUIDESHOW TOSPIESSTUBS Standalone test spies, stubs and mocks for JavaScript. Works with any unit testing framework.API DOCUMENTATION
API documentation - Sinon.JS - v11.1.1 This page contains the entire Sinon.JS API documentation along with brief introductions to the concepts Sinon implements.STUBS - SINON.JS
There are methods onFirstCall, onSecondCall,onThirdCall to make stub definitions read more naturally.. onCall can be combined with all of the behavior defining methods in this section. In particular, it can be used together with withArgs.MOCKS - SINON.JS
Introduction What are mocks? Mocks (and mock expectations) are fake methods (like spies) with pre-programmed behavior (like stubs) as well as pre-programmed expectations.. A mock will fail your test if it is not used as expected. MATCHERS - SINON.JSNPM SINONSINON ASSERT Matchers can be passed as arguments to spy.calledOn, spy.calledWith, spy.returned and thecorresponding sinon.assert functions as well as spy.withArgs. Matche ASSERTIONS - SINON.JS Sinon.JS ships with a set of assertions that mirror most behavior verification methods and properties on spies and stubs. The advantage of using the assertioSPIES - SINON.JS
The first example uses the two-dimensional args array directly on the spy, while the second example fetches the first call object and then accesses its args array. Which one to use is a matter of preference, but the recommended approach is going with spy.calledWith(arg1, arg2, ) unless there’s a need to make the tests highly specific.. API. Spy objects are objects returned from sinon.spy().FAKES - SINON.JS
Introduction. fake is available in Sinon from v5 onwards. It allows creation of a fake Function with the ability to set a default behavior.The available behaviors for the most part match the API of a sinon.stub.. In Sinon, a fake is a Function that records arguments, return value, the value of this and exception thrown (if any) for all of its calls.. A fake is immutable: once created, theFAKE XHR AND SERVER
Fake XMLHttpRequest. Provides a fake implementation of XMLHttpRequest and provides several interfaces for manipulating objects created by it.. Also fakes native XMLHttpRequest and ActiveXObject (when available, and only for XMLHTTP progids). Helps with testing requests made with XHR.. The fake server and XHR can be used completely stand-alone by downloading sinon-server.js. HOW TO STUB A DEPENDENCY OF A MODULE Sinon is a stubbing library, not a module interception library. Stubbing dependencies is highly dependant on your enviroment and the implementation. For NodeSINON.JS
Standalone test spies, stubs and mocks for JavaScript. Works with any unit testing framework.RELEASES - SINON.JS
Standalone test spies, stubs and mocks for JavaScript. Works with any unit testing framework.GUIDES - SINON.JS
Standalone test spies, stubs and mocks for JavaScript. Works with any unit testing framework. UTILITIES - SINON.JS Sinon.JS has a few utilities used internally in lib/sinon.js. Unless the method in question is documented here, it should not be consideredpart of the publi
GENERAL SETUP
We will be making fakes, spies and stubs. By default these are created in the default sandbox.Be sure to restore this sandbox after each test.. For example, if you’re using mocha youSPY CALL - SINON.JS
Spy call. A spy call is an object representation of an invididual call to a spied function, which could be a fake, spy, stub or mock method.. var spyCall = spy.getCall(n) Returns the nth call.Accessing individual calls helps with more detailed behavior verification when the spy is called more than once.FAKE TIMERS
Fake timers are synchronous implementations of setTimeout and friends that Sinon.JS can overwrite the global functions with to allow you to more easily test code using them.. Fake timers provide a clock object to pass time, which can also be used to control Date objects created through either new Date(); or Date.now(); (if supported by the browser).. For standalone usage of fake timers it is SANDBOXES - SINON.JS Sandboxes removes the need to keep track of every fake created, which greatly simplifies cleanup. HOW TO TEST ASYNC FUNCTIONS WITH FAKE TIMERS With fake timers (lolex), testing code that depends on timers is easier, as it sometimes becomes possible to skip the waiting part and trigger scheduled callbacks synchronously.SINONJS.ORG
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* Guides
* How To
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GET STARTED
INSTALL USING NPM
To install the current release (v9.0.2) of Sinon:npm install sinon
SETTING UP ACCESS
NODE AND COMMONJS BUILD SYSTEMS var sinon = require('sinon');DIRECT BROWSER USE
// Access the `sinon` global... Or in an ES6 Modules environment (modern browsers only)TRY IT OUT
The following function takes a function as its argument and returns a new function. You can call the resulting function as many times as you want, but the original function will only be called once: function once(fn) { var returnValue, called = false; return function () {if (!called) {
called = true;
returnValue = fn.apply(this, arguments);}
return returnValue;};
}
FAKES
Testing this function can be quite elegantly achieved with a test fake:
it('calls the original function', function () { var callback = sinon.fake(); var proxy = once(callback);proxy();
assert(callback.called);});
The fact that the function was only called once is important: it('calls the original function only once', function () { var callback = sinon.fake(); var proxy = once(callback);proxy();
proxy();
assert(callback.calledOnce);// ...or:
// assert.equals(callback.callCount, 1);});
We also care about the this value and arguments: it('calls original function with right this and args', function () { var callback = sinon.fake(); var proxy = once(callback);var obj = {};
proxy.call(obj, 1, 2, 3); assert(callback.calledOn(obj)); assert(callback.calledWith(1, 2, 3));});
Learn more about fakes .BEHAVIOR
The function returned by once should return whatever the original function returns. To test this, we create a fake with behavior: it("returns the return value from the original function", function () { var callback = sinon.fake.returns(42); var proxy = once(callback); assert.equals(proxy(), 42);});
Conveniently, we can query fakes for their callCount, received argsand more.
Learn more about fakes .TESTING AJAX
The following function triggers network activity: function getTodos(listId, callback) {jQuery.ajax({
url: '/todo/' + listId + '/items', success: function (data) { // Node-style CPS: callback(err, data) callback(null, data);}
});
}
A unit test should not actually trigger a function’s network activity. To test getTodos() without triggering its network activity, use the sinon.replace() method to replace the jQuery.ajax method in your test. Restore the jQuery.ajax method after your test by calling sinon.restore() in your test runner’s after() function. after(function () {sinon.restore();
});
it('makes a GET request for todo items', function () { sinon.replace(jQuery, 'ajax', sinon.fake()); getTodos(42, sinon.fake()); assert(jQuery.ajax.calledWithMatch({ url: '/todo/42/items' }));});
FAKE XMLHTTPREQUEST
While the preceding test shows off some nifty Sinon.JS tricks, it is too tightly coupled to the implementation. When testing Ajax, it is better to use Sinon.JS’ fake XMLHttpRequest:
var xhr, requests; before(function () { xhr = sinon.useFakeXMLHttpRequest();requests = ;
xhr.onCreate = function (req) { requests.push(req); };});
after(function () { // Like before we must clean up when tampering with globals.xhr.restore();
});
it("makes a GET request for todo items", function () { getTodos(42, sinon.fake()); assert.equals(requests.length, 1); assert.match(requests.url, "/todo/42/items");});
Learn more about fake XMLHttpRequest.
FAKE SERVER
The preceding example shows how flexible this API is. If it looks too laborous, you may like the fake server:var server;
before(function () { server = sinon.fakeServer.create(); }); after(function () { server.restore(); }); it("calls callback with deserialized data", function () { var callback = sinon.fake(); getTodos(42, callback); // This is part of the FakeXMLHttpRequest API server.requests.respond(200,
{ "Content-Type": "application/json" },JSON.stringify()
);
assert(callback.calledOnce);});
Test framework integration can typically reduce boilerplate further. Learn more about the fake server.
FAKING TIME
> “I don’t always bend time and space in unit tests, but when I > do, I use Buster.JS + Sinon.JS” _Brian Cavalier, Cujo.JS_
Testing time-sensitive logic without the wait is a breeze with Sinon.JS. The following function debounces another function - only when it has not been called for 100 milliseconds will it call the original function with the last set of arguments it received. function debounce(callback) {var timer;
return function () { clearTimeout(timer); var args = .slice.call(arguments); timer = setTimeout(function () { callback.apply(this, args);}, 100);
};
}
Thanks to Sinon.JS’ time-bending abilities, testing it is easy:var clock;
before(function () { clock = sinon.useFakeTimers(); }); after(function () { clock.restore(); }); it('calls callback after 100ms', function () { var callback = sinon.fake(); var throttled = debounce(callback);throttled();
clock.tick(99);
assert(callback.notCalled);clock.tick(1);
assert(callback.calledOnce);// Also:
// assert.equals(new Date().getTime(), 100);});
As before, Sinon.JS provides utilities that help test frameworks reduce the boiler-plate. Learn more about fake time.
AND ALL THE REST…
You’ve seen the most common tasks people tackle with Sinon.JS, yet we’ve only scratched the surface. View more quick examples below, or dive into the API docs , which also provides useful pointers on how and when to use the various functionality.GET HELP
* Stack Overflow
* IRC: #sinon.js on freenodeSINON.JS ELSEWHERE
* Testing Backbone applications with Jasmine and Sinon * Sinon.JS fake server live demo Christian Johansen’s book Test-Driven JavaScript Development covers some of the design philosophy and initial sketches for Sinon.JS. Join the discussion on Stack Overflow! All copyright is reserved the Sinon committers. Released under the BSD license.
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