Types that implement ISerializable can't be mocked anymore with the 2019.1.115.2 version resulting in System.ArgumentException. The issue is a regression compared to older versions of JustMock.

Example of such type is System.Reflection.Assembly. 

A simple WinForms application crashes on start when JustMock(2019.1.115.2) profiler is enabled.

Steps to reproduce:
1. Create a new WinForms Application.
2. Start the application. In Debug it is most visible. 
3. After the application is started move the mouse in the middle of the application. The exact location is not important.
4. A FieldAccessExceptionis is thrown.



Temporary workaround: disable the JustMock Profiler from the JustMock menu while developing the application and enable it while running the tests.
A fix can be expected with the next official release. You can follow this item in order to receive status updates.

Basically calling Mock.Reset at the end of the method is not safe.
It seems like the the way JustMock iterates over an IEnumerable is not correct.
Log:
2019-01-25T09:23:53.9254819Z Warning: System.InvalidOperationException: Collection was modified; enumeration operation may not execute.
2019-01-25T09:23:53.9254819Z    at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource)
2019-01-25T09:23:53.9254819Z    at System.Collections.Generic.Dictionary`2.Enumerator.MoveNext()
2019-01-25T09:23:53.9254819Z    at Telerik.JustMock.Core.MocksRepository.CopyConfigurationFromParent()
2019-01-25T09:23:53.9254819Z    at Telerik.JustMock.Core.MocksRepository.Reset()
2019-01-25T09:23:53.9254819Z    at Telerik.JustMock.Core.Context.HierarchicalTestFrameworkContextResolver.RepositoryOperationsStrongRef.RetireRepository(Object key, MocksRepository repo)
2019-01-25T09:23:53.9254819Z    at Telerik.JustMock.Core.Context.HierarchicalTestFrameworkContextResolver.FindRepositoryInOps(RepositoryOperationsBase entryOps, Object entryKey)
2019-01-25T09:23:53.9254819Z    at Telerik.JustMock.Core.Context.HierarchicalTestFrameworkContextResolver.RetireRepository()
2019-01-25T09:23:53.9254819Z    at Telerik.JustMock.Core.Context.MockingContext.RetireRepository()
2019-01-25T09:23:53.9254819Z    at Telerik.JustMock.Core.ProfilerInterceptor.GuardInternal(Action guardedAction)
2019-01-25T09:23:53.9254819Z    at Sap.Tests.<MyTests_DoAsync_ReturnTrue>d__26.MoveNext() in E:\Builds\_work\9\s\Tests\MyTests.cs:line 476
2019-01-25T09:23:53.9254819Z    at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
2019-01-25T09:23:53.9254819Z    at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
2019-01-25T09:23:53.9410972Z    at System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.Run()
2019-01-25T09:23:53.9410972Z    at System.Threading.ThreadPoolWorkQueue.Dispatch()
2019-01-25T09:23:53.9410972Z    at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource)
2019-01-25T09:23:53.9410972Z    at System.Collections.Generic.Dictionary`2.Enumerator.MoveNext()
2019-01-25T09:23:53.9410972Z    at Telerik.JustMock.Core.MocksRepository.CopyConfigurationFromParent()
2019-01-25T09:23:53.9410972Z    at Telerik.JustMock.Core.MocksRepository.Reset()
2019-01-25T09:23:53.9410972Z    at Telerik.JustMock.Core.Context.HierarchicalTestFrameworkContextResolver.RepositoryOperationsStrongRef.RetireRepository(Object key, MocksRepository repo)
2019-01-25T09:23:53.9410972Z    at Telerik.JustMock.Core.Context.HierarchicalTestFrameworkContextResolver.FindRepositoryInOps(RepositoryOperationsBase entryOps, Object entryKey)
2019-01-25T09:23:53.9410972Z    at Telerik.JustMock.Core.Context.HierarchicalTestFrameworkContextResolver.RetireRepository()
2019-01-25T09:23:53.9410972Z    at Telerik.JustMock.Core.Context.MockingContext.RetireRepository()
2019-01-25T09:23:53.9410972Z    at Telerik.JustMock.Core.ProfilerInterceptor.GuardInternal(Action guardedAction)
2019-01-25T09:23:53.9410972Z    at Sap.Tests.<MyTests_DoAsync_ReturnTrue>d__26.MoveNext() in E:\Builds\_work\9\s\Tests\MyTests.cs:line 476
2019-01-25T09:23:53.9410972Z    at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
2019-01-25T09:23:53.9410972Z    at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
2019-01-25T09:23:53.9410972Z    at System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.Run()
2019-01-25T09:23:53.9410972Z    at System.Threading.ThreadPoolWorkQueue.Dispatch()

If there are more that one mock objects existing in the test, Mock.Assert wrongly succeeds while evaluating arrangements for each mock, but not the very first one. This is a regression compared to an older version from 2012. The following sample demonstrates the case:
public interface IFoo
{
    void Bar();
}

[TestClass]
public class UnitTest1
{
    [TestMethod]
    public void TestMethod1()
    {
        var bar = Mock.Create<IFoo>();
        Mock.Arrange(() => bar.Bar()).OccursOnce();

        var foo = Mock.Create<IFoo>();
        Mock.Arrange(() => foo.Bar()).OccursOnce();

        Mock.Assert(foo); // Would wrongly succeed
        Mock.Assert(bar); // Would fail as expected
    }
}

Creating a share link with Visual Studio Live Share does not work if you have the JustMock profiler enabled. We specifically have to disable the JustMock profiler in order for VS Live Share to create sharing links. This has been reproduced by several different members of our team.

Could this please be looked into? Thanks!

When using Mock.CreateLike<> we've found that trying to directly mock anything lower than two layers down on a concrete class (e.g. x => x.Layer1.Layer2.Property == "test") throws a NullReferenceException unless the profiler is enabled. It wasn't clear in the exception or the documentation relating to this method that the real issue was the profiler being disabled, and only by trial and error did we find the solution.

this nuts, forcing me to answer a dialog for JustMock and JustTrace to turn off sending usage to Telerik.  Very poor UX.  Stop doing this.

Resharper 10 code coverage have tests failing when arrange to have JustMock to return values from methods called under test. Perhaps one tool too many manipulating .NET objects behind-the-scenes at a time?

A class property get wrongly mocked when used as parameter for arranging other class methods. The following sample demonstrates the scenario:

class Foo
{
	public string Prop{ get; set; }

	public void Bar(string val)
	{
	}
}

[TestMethod]
public void Sample()
{
	var sut = Mock.Create<Foo>(Behavior.CallOriginal);

	Mock.Arrange(() => sut.Bar(sut.Prop)).DoNothing();
}

MbUnitContextResolver gets wrongly initialized because of the weak check based on Gallio.Framework.Assertions.AssertionException type presence in the current app domain. Needs to be improved with some additional type check from mbunit assembly, MbUnit.Framework.TestFixtureAttribute for example.

Mocking an async calls alse triggers hidden mocking of the return type. Depending of the type it might cause unexpected behavior or exception.

Asynchronous test execution might be run in a separate thread (it depends of the environment and it is completely transparent) which causes arrangements to lose their context. That is why the expected mocked return value for DateTime.UtcNow calls the original code and finally the test fails.

My team and I have spotted some odd behaviour with the latest version of JustMock (2015.3.929.5) when targeting a Windows Store app.

If we create a mock for an object in a helper method, the mock fails when making assertions for calls to the mock.

The following code illustrates the issue:

        [TestMethod]
        public void ThisWillFail()
        {
            var subject = CreateSubject();

            subject.DoSomething();

            subject.Assert(s => s.DoSomething(), Occurs.Once());
        }

        [TestMethod]
        public void ThisWillPass()
        {
            var subject = Mock.Create<ISubject>();

            subject.DoSomething();

            subject.Assert(s => s.DoSomething(), Occurs.Once());
        }

        public interface ISubject
        {
            void DoSomething();
        }

        private static ISubject CreateSubject()
        {
            return Mock.Create<ISubject>();
        }

In this code, the first test will fail but the second test will pass. The only difference is that, in the first test, we're setting up the mock in a helper method.

We have a "Unit Test Library (.NET for Windows Store apps)" referencing the Telerik.JustMock assembly. I have attached a simple project containing this implementation.

It's worth noting that the same code passes in a regular .NET class library; it only fails in a "Unit Test Library (.NET for Windows Store apps)". It's also worth noting that this worked under an older version of the assembly (2014.3.1021.2).

Any help would be appreciated, as we currently have around 3,000 tests and a good proportion of them set up their mocks using a helper method in this way.

Regards
William Cowell

There is a different behaviour when mocking the same method using the following two Arrange overrides:

public static FuncExpectation<TResult> Arrange<TResult>(Expression<Func<TResult>> expression);
public static FuncExpectation<TResult> Arrange<T, TResult>(T obj, Func<T, TResult> func);

Repro project attached. Steps to reproduce:
1. Open attached solution
2. In Tests.cs, run JustMockArrangeQueryableTest - it passes
3. Run JustMockArrangeQueryableTest2 - it fails with a invalid cast exception on the Residents collection.

In Visual Studio 2015 Pro justmock generates this error error MSB6006: "vbc.exe" To function properly you need to uninstall VS2015 justmock.

Bye

Tests fail when run with vstest.console.exe but pass when run from VS2015.

Findings: The problematic scenario includes reference to Microsoft.WindowsAzure.ServiceRuntime.dll and usage of the RoleEnvironment class. When the RoleEnvironment class is used in a test project without JustMock and runned from vstest.console the exception will be thrown as well. Here is the exact exception: 
System.TypeInitializationException: The type initializer for 'Microsoft.WindowsAzure.ServiceRuntime.RoleEnvironment' threw an exception. ---> System.TypeInitializationException: The type initializer for '<Module>' threw an exception. ---> <CrtImplementationDetails>.ModuleLoadException: The C++ module failed to load while attempting to initialize the default appdomain.
 ---> System.Runtime.InteropServices.COMException: Invalid operation. (Exception from HRESULT: 0x80131022)
Stack Trace:
    at System.Runtime.InteropServices.Marshal.ThrowExceptionForHRInternal(Int32 errorCode, IntPtr errorInfo)
   at <CrtImplementationDetails>.GetDefaultDomain()
   at <CrtImplementationDetails>.DoCallBackInDefaultDomain(IntPtr function, Void* cookie)
   at <CrtImplementationDetails>.LanguageSupport.InitializeDefaultAppDomain(LanguageSupport* )
   at <CrtImplementationDetails>.LanguageSupport._Initialize(LanguageSupport* )
   at <CrtImplementationDetails>.LanguageSupport.Initialize(LanguageSupport* )
--- End of inner exception stack trace ---
    at <CrtImplementationDetails>.LanguageSupport.Initialize(LanguageSupport* )
   at .cctor()
--- End of inner exception stack trace ---
    at Microsoft.WindowsAzure.ServiceRuntime.RoleEnvironment.InitializeEnvironment()
   at Microsoft.WindowsAzure.ServiceRuntime.RoleEnvironment..cctor()
--- End of inner exception stack trace ---
    at Microsoft.WindowsAzure.ServiceRuntime.RoleEnvironment.get_IsAvailable()

Workaround: the vstest.console.exe could be started with parameter /InIsolation, which runs the tests in an isolated process. Here is the link to the command line options: https://msdn.microsoft.com/en-us/library/jj155796.aspx

I have logging class which are using everywhere.
I want to Mock this class for all tests. And i tried to use AssemblyInitialize but got problem. I have simulated this problem with JustMock.ElevatedExamples.AdvancedUsage examples:
1) Add BaseTest class
 [TestClass]
    public class BaseTest
    {
        [AssemblyInitialize()]
        public static void AssemblyInit(TestContext context)
        {
            Mock.SetupStatic(typeof(Common1), StaticConstructor.Mocked);
            // Arranging: When the static(Foo.FooProp_GET) property is called, it should return expected.
            var fakeUsed = Mock.Create<LogWriter1>(Constructor.Mocked);
            Mock.Arrange(() => Common1.Log).Returns(fakeUsed);
        }

        [AssemblyCleanup]
        public static void Cleanup()
        {
            //clean up stuff here
        }
    }
    public static class Common1
    {
        static Common1()
        {

            Log = new LogWriter1();

        }

        public static LogWriter1 Log { get; set; }

    }

    public class LogWriter1
    {

    }

2) When run test from VS - all ok
3) When run from command line it is not working. Show Message box "Process Starts Now".

SET JUSTMOCK_INSTANCE=1
SET COR_ENABLE_PROFILING=1
SET COR_PROFILER={B7ABE522-A68F-44F2-925B-81E7488E9EC0}
"C:\Program Files (x86)\Telerik\JustMock\Libraries\JustMockRunner.exe" "C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE\MSTest.exe" /testcontainer:"D:\test\CSExamples\JustMock.ElevatedExamples\bin\Debug\JustMock.ElevatedExamples.dll"

How i can mock logger for all test? It is static public property.

I use MS Test + VS 2015.

I have installed the trial version of JustMock to evaluate it. I have been trying to mock the static calls of Azure RoleEnvironment class, but the SetupStatic does not work. It seems to be calling the original method. Please see my simple test below:

[Test]
public void VerifyRoleEnvironment()
{
       bool expected = true;
       Mock.SetupStatic(typeof(RoleEnvironment), StaticConstructor.Mocked);
       Mock.Arrange(() => RoleEnvironment.IsAvailable).Returns(true);
       Assert.AreEqual(expected, RoleEnvironment.IsAvailable);
}

1. Load the attached project in Visual Studio 2013.
2. Update the NuGet packages (NUnit).
3. Update the reference to JustMock to point to the correct path to a retail version of Telerik.JustMock.dll.
4. Run tests in NUnit runner (or any other runner that will run them in the same process/sequentially.
5. --> Notice that the first TestCase will pass, the second will fail.
6. Run the two test cases separately.
7. --> Notice that they both pass.
8. Remove the reference to Telerik.JustMock.dll.
9. Use NuGet to get the latest JustMock Lite.
10. Run the tests again.
11. --> Notice that they both pass.

This appears to be a bug with JustMock (retail) 2013.3.1119.2.  The bug does not reproduce when using JustMock Lite from NuGet.

If you drop into a debugger and step through both tests in a row you see the following behavior:
1. When the first test is started (after SetUp has been called) FlagA is correctly set to true and FlagB is defaulted to false.
2. When you step over the Mock.Arrange, FlagA is still true and FlagB is set to the value of input (order of running tests doesn't appear to matter, second always fails).
3. When the second test starts (after SetUp has been called again) Flag A is correctly set to true and FlagB is defaulted to false.
4. When you step over the Mock.Arrange, FlagB is set to the value of input but FlagA has been reverted to default!

If you add several other properties to the interface they will all be reset to default (no matter how many you arrange) when the second test executes the Mock.Arrange.

This bug reproduces without the JustMock profiler attached, and also with the profiler attached.

The version of JustMock Lite that was tested against is 2014.1.1217.4.  When I run the Telerik Control Panel I am not prompted to update my version of JustMock beyond 2013.3.1119.2 (perhaps this bug is already fixed and I just need to figure out how to upgrade).