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There is a newer prerelease version of this package available. See the version list below for details.

Moq: an enjoyable mocking library


Moq is the most popular and friendly mocking framework for .NET

To install Moq: an enjoyable mocking library, run the following command in the Package Manager Console

Install-Package Moq -Version 4.5.16

Release Notes

Version 4.5
* Updated to .NET 4.5
* Dropped support for .NET < 4.5 and Silverlight
* Remove ILMerge. Depend on Castle NuGet package instead.

Version 4.3
* Added support for Roslyn
* Automatically add implemented interfaces to mock

Version 4.2
* Improved support for async APIs by making default value a completed task
* Added support for async Returns and Throws
* Improved mock invocation sequence testing
* Improved support for multi-threaded tests
* Added support for named mocks

Version 4.1
* Added covariant IMock<out T> interface to Mock<T>
* Added It.IsNotNull<T>
* Fix: 'NullReferenceException when subscribing to an event'
* Added overloads to Verify to accept Times as a Method Group
* Feature request: It.IsIn(..), It.IsNotIn(...)
* Corrected Verify method behavior for generic methods calls
* Differentiate verification error from mock crash
* Fix: Adding (and removing) handlers for events declared on interfaces works
when CallBase = true.
* Update to latest Castle
* Fix: Mock.Of (Functional Syntax) doesn't work on properties with non-public setters
* Fix: Allow to use CallBase instead of Returns
* Fix: Solved Multi-threading issue - IndexOutOfRangeException
* Capability of mocking delegates (event handlers)

Version 4.0
* Linq to Mocks: Mock.Of<T>(x => x.Id == 23 && x.Title == "Rocks!")
* Fixed issues:
  *  87 BadImageFormatException when using a mock with a Visual Studio generated Accessor object
  *  166 Unable to use a delegate to mock a function that takes 5 or more parameters.
  *  168 Call count failure message never says which is the actual invocation count
  *  175 theMock.Object failing on VS2010 Beta 1
  *  177 Generic constraint on interface method causes BadImageFormatException when getting Object.
  *  183 Display what invocations were recieved when the expected one hasn't been met
  *  186 Methods that are not virtual gives non-sense-exception message
  *  188 More Callback Overloads
  *  199 Simplify SetupAllProperties implementation to simply iterate and call SetupProperty
  *  200 Fluent mock does not honor parent mock CallBase setting.
  *  202 Mock.Protected().Expect() deprecated with no work-around
  *  204 Allow default return values to be specified (per-mock)
  *  205 Error calling SetupAllProperties for Mock<IDataErrorInfo>
  *  206 Linq-to-Mocks Never Returns on Implicit Boolean Property
  *  207 NullReferenceException thrown when using Mocks.CreateQuery with implicit boolean expression
  *  208 Can't setup a mock for method that accept lambda expression as argument.
  *  211 SetupAllProperties should return the Mock<T> instead of void.
  *  223 When a method is defined to make the setup an asserts mock fails
  *  226 Can't raise events on mocked Interop interfaces
  *  229 CallBase is not working for virtual events
  *  238 Moq fails to mock events defined in F#
  *  239 Use Func instead of Predicate
  *  250 4.0 Beta 2 regression - cannot mock MethodInfo when targetting .NET 4
  *  251 When a generic interface also implements a non-generic version, Verify does not work in some cases
  *  254 Unable to create mock of EnvDTE.DTE
  *  261 Can not use protected setter in public property
  *  267 Generic argument as dependency for method Setup overrides all previous method setups for a given method
  *  273 Attempting to create a mock thrown a Type Load exception. The message refers to an inaccessible interface.
  *  276 .Net 3.5 no more supported

Version 3.0

* Silverlight support! Finally integrated Jason's Silverlight contribution! Issue #73
* Brand-new simplified event raising syntax (#130): mock.Raise(foo => foo.MyEvent += null, new MyArgs(...));
* Support for custom event signatures (not compatible with EventHandler): mock.Raise(foo => foo.MyEvent += null, arg1, arg2, arg3);
* Substantially improved property setter behavior: mock.VerifySet(foo => foo.Value = "foo");  //(also available for SetupSet
* Renamed Expect* with Setup*
* Vastly simplified custom argument matchers: public int IsOdd() < return Match<int>.Create(v => i % 2 == 0); >
* Added support for verifying how many times a member was invoked: mock.Verify(foo => foo.Do(), Times.Never());
* Added simple sample app named StoreSample
* Moved Stub functionality to the core API (SetupProperty and SetupAllProperties)
* Fixed sample ASP.NET MVC app to work with latest version
* Allow custom matchers to be created with a substantially simpler API
* Fixed issue #145 which prevented discrimination of setups by generic method argument types
* Fixed issue #141 which prevented ref arguments matching value types (i.e. a Guid)
* Implemented improvement #131: Add support for It.IsAny and custom argument matchers for SetupSet/VerifySet
* Implemented improvement #124 to render better error messages
* Applied patch from David Kirkland for improvement #125 to improve matching of enumerable parameters
* Implemented improvement #122 to provide custom errors for Verify
* Implemented improvement #121 to provide null as default value for Nullable<T>
* Fixed issue #112 which fixes passing a null argument to a mock constructor
* Implemented improvement #111 to better support params arguments
* Fixed bug #105 about improperly overwriting setups for property getter and setter
* Applied patch from Ihar.Bury for issue #99 related to protected expectations
* Fixed issue #97 on not being able to use SetupSet/VerifySet if property did not have a getter
* Better integration with Pex (http://research.microsoft.com/en-us/projects/Pex/)
* Various other minor fixes (#134, #135, #137, #138, #140, etc.)

Version 2.6

* Implemented Issue #55: We now provide a mock.DefaultValue = [DefaultValue.Empty | DefaultValue.Mock] which will provide the current behavior (default) or mocks for mockeable return types for loose mock invocations without expectations.
* Added support for stubbing properties from moq-contrib: now you can do mock.Stub(m => m.Value) and add stub behavior to the property. mock.StubAll() is also provided. This integrates with the DefaultValue behavior too, so you can stub entire hierarchies :).
* Added support for mocking methods with out and ref parameters (Issue #50)
* Applied patch contributed by slava for Issue #72: add support to limit numbor of calls on mocked method (we now have mock.Expect(...).AtMost(5))
* Implemented Issue #94: Easier setter verification: Now we support ExpectSet(m = m.Value, "foo") and VerifySet(m = m.Value, 5) (Thanks ASP.NET MVC Team!)
* Implemented issue #96: Automatically chain mocks when setting expectations. It's now possible to specify expectations for an entire hierarchy of objects just starting from the root mock. THIS IS REALLY COOL!!!
* Fixed Issue #89: Expects() does not always return last expectation
* Implemented Issue 91: Expect a method/property to never be called (added Never() method to an expectation. Can be used on methods, property getters and setters)
* Fixed Issue 86: IsAny<T> should check if the value is actually of type T
* Fixed Issue 88: Cannot mock protected internal virtual methods using Moq.Protected
* Fixed Issue 90: Removing event handlers from mocked objects
* Updated demo and added one more test for the dynamic addition of interfaces

Version 2.5

* Added support for mocking protected members
* Added new way of extending argument matchers which is now very straightforward
* Added support for mocking events
* Added support for firing events from expectations
* Removed usage of MBROs which caused inconsistencies in mocking features
* Added ExpectGet and ExpectSet to better support properties, and provide better intellisense.
* Added verification with expressions, which better supports Arrange-Act-Assert testing model (can do Verify(m => m.Do(...)))
* Added Throws<TException>
* Added mock.CallBase property to specify whether the virtual members base implementation should be called
* Added support for implementing and setting expectations and verifying additional interfaces in the mock, via the new mock.As<TInterface>() method (thanks Fernando Simonazzi!)
* Improved argument type matching for Is/IsAny  (thanks Jeremy.Skinner!)

Version 2.0

* Refactored fluent API on mocks. This may cause some existing tests to fail, but the fix is trivial (just reorder the calls to Callback, Returns and Verifiable)
* Added support for retrieving a Mock<T> from a T instance created by a mock.
* Added support for retrieving the invocation arguments from a Callback or Returns.
* Implemented AtMostOnce() constraint
* Added support for creating MBROs with protected constructors
* Loose mocks now return default empty arrays and IEnumerables instead of nulls

Version 1.5.1

* Refactored MockFactory to make it simpler and more explicit to use with regards to verification. Thanks Garry Shutler for the feedback!

Version 1.5

* Added MockFactory to allow easy construction of multiple mocks with the same behavior and verification

Version 1.4

* Added support for passing constructor arguments for mocked classes.
* Improved code documentation

Version 1.3

* Added support for overriding expectations set previously on a Mock. Now adding a second expectation for the same method/property call will override the existing one. This facilitates setting up default expectations in a fixture setup and overriding when necessary in a specific test.
* Added support for mock verification. Both Verify and VerifyAll are provided for more flexibility (the former only verifies methods marked Verifiable)

Version 1.2

* Added support for MockBehavior mock constructor argument to affect the way the mocks expect or throw on calls.

Version 1.1

* Merged branch for dynamic types. Now Moq is based on Castle DynamicProxy2 to support a wider range of mock targets.
* Added ILMerge so that Castle libraries are merged into Moq assembly (no need for external references and avoid conflicts)

Version 1.0

* Initial release, initial documentation process in place, etc.



Daniel Cazzulino, kzu



Version History

Version Downloads Last updated
Moq: an enjoyable... 4.6.36-alpha 921 Wednesday, July 20, 2016
Moq: an enjoyable... 4.6.25-alpha 14,266 Monday, June 6, 2016
Moq: an enjoyable... 4.5.13 15,073 Monday, July 11, 2016
Moq: an enjoyable... 4.5.10 54,414 Tuesday, June 21, 2016
Moq: an enjoyable... 4.5.9 43,325 Thursday, June 9, 2016
Moq: an enjoyable... 4.5.9-alpha 1,908 Sunday, May 22, 2016
Moq: an enjoyable... 4.5.8 47,376 Thursday, May 26, 2016
Moq: an enjoyable... 4.5.7 1,111 Thursday, May 26, 2016
Moq: an enjoyable... 4.5.7-alpha 67 Sunday, May 22, 2016
Moq: an enjoyable... 4.5.6-alpha 51 Sunday, May 22, 2016
Moq: an enjoyable... 4.5.3 5,475 Wednesday, May 25, 2016
Moq: an enjoyable... 4.5.0 11,912 Tuesday, May 24, 2016
Moq: an enjoyable... 4.2.1510.2205 1,026,964 Thursday, October 22, 2015
Moq: an enjoyable... 4.2.1507.118 624,471 Wednesday, July 1, 2015
Moq: an enjoyable... 4.2.1506.2515 38,969 Thursday, June 25, 2015
Moq: an enjoyable... 4.2.1506.2016 21,479 Saturday, June 20, 2015
Moq: an enjoyable... 4.2.1502.911 932,743 Monday, February 9, 2015
Moq: an enjoyable... 4.2.1409.1722 563,289 Wednesday, September 17, 2014
Moq: an enjoyable... 4.2.1408.717 479,410 Thursday, August 7, 2014
Moq: an enjoyable... 4.2.1408.619 15,711 Wednesday, August 6, 2014
Moq: an enjoyable... 4.2.1402.2112 747,791 Friday, February 21, 2014
Moq: an enjoyable... 4.2.1312.1622 304,497 Tuesday, December 17, 2013
Moq: an enjoyable... 4.2.1312.1621 851 Monday, December 16, 2013
Moq: an enjoyable... 4.2.1312.1615 1,561 Monday, December 16, 2013
Moq: an enjoyable... 4.2.1312.1416 9,227 Saturday, December 14, 2013
Moq: an enjoyable... 4.2.1312.1323 879 Saturday, December 14, 2013
Moq: an enjoyable... 4.2.1312.1319 4,057 Friday, December 13, 2013
Moq: an enjoyable... 4.1.1311.615 198,270 Monday, November 18, 2013
Moq: an enjoyable... 4.1.1309.1617 226,059 Monday, September 16, 2013
Moq: an enjoyable... 4.1.1309.919 206,896 Monday, September 9, 2013
Moq: an enjoyable... 4.1.1309.801 4,819 Sunday, September 8, 2013
Moq: an enjoyable... 4.1.1309.800 731 Sunday, September 8, 2013
Moq: an enjoyable... 4.1.1308.2321 53,711 Friday, August 23, 2013
Moq: enjoyable... 4.1.1308.2316 917 Friday, August 23, 2013
Moq 4.1.1308.2120 21,968 Wednesday, August 21, 2013
Moq 4.0.10827 1,279,379 Wednesday, February 9, 2011
Moq 3.1.416.3 28,914 Wednesday, February 9, 2011