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Error while trying to run justmock sample

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Sathyamurthy asked on 31 Jul 2012, 10:48 AM

Hi,
I downloaded the trial version of Justmock. I'm trying to run the tests in HttpContextTest.cs. I'm getting the following error while running it. Here is the code it's trying to run. JustMock was enabled in the menu.
[TestClass]
public class HttpContextTest
{
static HttpContextTest()
{
Mock.Partial<HttpContext>().For<HttpContext, HttpRequest>(x => x.Request);
Mock.Partial<HttpContext>().For(() => HttpContext.Current);
}
[TestMethod]
public void ShouldMockCurrentHtppContext()
{
bool called = false;
Mock.Arrange(() => HttpContext.Current).DoInstead(() => called = true);
var ret = HttpContext.Current;
Assert.True(called);
}

}

Test 'Telerik.JustMock.Tests.Elevated.Integration.HttpContextTest.ShouldMockCurrentHtppContext' failed: Telerik.JustMock.MockException : There were some problems intercepting the mock call. Optionally, please make sure that you have turned on JustMock's profiler while mocking concrete members.
at Telerik.JustMock.Expectations.Expectation.ThrowForInvalidCall(IInvocation invocation)
at Telerik.JustMock.Expectations.Expectation.Process[TResult](IInvocation invocation)
at Telerik.JustMock.Mock.<>c__DisplayClass1`1.<Arrange>b__0(MockContext`1 x)
at Telerik.JustMock.MockContext.Setup[TDelgate,TReturn](Instruction instruction, Func`2 function)
at Telerik.JustMock.Mock.Arrange[TResult](Expression`1 expression)
Elevated\Integration\HttpContextTest.cs(32,0): at Telerik.JustMock.Tests.Elevated.Integration.HttpContextTest.ShouldMockCurrentHtppContext()

15 Answers, 1 is accepted

answered on 03 Aug 2012, 08:33 PM

Hi Sathyamurthy,

Thanks again for contacting us.

From Q2 2012 you no longer have to do Mock.Partial to mock HttpContext class. I wrote the test in the following way and it working as expected:

[TestMethod]

public void ShouldMockCurrentHtppContext()

{

bool called = false;

Mock.Arrange(() => HttpContext.Current).DoInstead(() => called = true);

var ret = HttpContext.Current;

Assert.IsTrue(called);

}

Here to note that we have upgraded the profiler in Q2 2012 therefore if you are using the latest Telerik.JustMock.DLL please check that your profiler is updated as well and vice-versa. The best way it is to do a fresh install and update all your project references for JustMock.

Kind Regards
Ricky
the Telerik team

Explore the entire Telerik portfolio by downloading Telerik DevCraft Ultimate.

answered on 07 Aug 2012, 07:22 AM

Thanks for the response. I have found an issue with mocking DateTime.Now(may be this is applicable for all mscorlib mocking). Taking the example given below, assuming that GetTime takes an argument of reference type which is defined in another assembly, it's failing. I mean mocking is not happening. Rather, DateTime.Now is actually called. I'm not sure if I'm missing something. Consider the following code. Assuming that "User" class is defined in a different assembly, the mocking is failing.

public class Time
{
    public DateTime GetTime(User user)
    {
        return DateTime.Now;
    }
}

Unit Test:

[TestFixture]
public class DateTimeTest
{
    [Test]
    public void GetTime_Returns_Current_Date()
    {
        DateTime expectedTime = new DateTime(2011, 1, 1);
User user= new User();
        Mock.Replace(() => DateTime.Now).In<Time>(x => x.GetTime(user));

        Mock.Arrange(() => DateTime.Now).Returns(expectedTime);
        Time time = new Time();
        DateTime now = time.GetTime(user);

        Assert.IsTrue(now.Year == 2011);
        Assert.IsTrue(now.Month == 1);
        Assert.IsTrue(now.Day == 1);
    }

}

answered on 08 Aug 2012, 05:54 PM

Hi Sathyamurty,

Thanks again for contacting us.

We have identified that the issue is due to loading of User object that is located in another assembly, which is not strongly typed. However, we just the fixed issue and it will be available later this week.

In addition, you can also write the test in the following way that works nicely:

[Test]

public void GetTime_Returns_Current_Date()

{

DateTime expectedTime = new DateTime(2011, 1, 1);

User user= new User();

Mock.Arrange(() => time.GetTime(user)).Returns(expectedTime).IgnoreInstance();

Time time = new Time();

DateTime now = time.GetTime(user);

Assert.IsTrue(now.Year == 2011);

Assert.IsTrue(now.Month == 1);

Assert.IsTrue(now.Day == 1);

}

Kind Regards
Ricky
the Telerik team

Explore the entire Telerik portfolio by downloading Telerik DevCraft Ultimate.

answered on 24 Oct 2012, 04:13 PM

MockObjectInDifferetnAssembly.zip

Hi Rayne,

Thanks again for bringing up the question.

This is indeed resolved in the latest version. I am sending you a sample project that clarifies it even further.

Kind Regards
Ricky
the Telerik team

Explore the entire Telerik portfolio by downloading Telerik DevCraft Ultimate.

answered on 24 Oct 2012, 04:59 PM

This doesn't quite help me. Here's what I'm trying to do:

In the sample you sent, both the method (GetCurrentDate) and the parameter class (User) are defined in the same project (Core). Another thing I notice in your sample, is that you are ignoring the instance, so naturally it will work. You are bypassing the whole method call.

What I'm trying to test is that File.WriteAllBytes was called inside the method. Here is the method I'm trying to test:

public Class1 WriteBytes(FileStructure fs)

{

var tfs = (TextFileStructure) fs;

tfs.Path = Path.Combine(@"C:\Temp", "hello.txt");

try

{

File.WriteAllBytes(tfs.Path, tfs.Text);

IsSuccessful = true;

}

catch (FileNotFoundException)

{

//do nothing

}

return this;

}

Here is the test class:

public void TestMethod3() {

var called = false;

var _sample = new Class1();

// Arrange

var fs = Mock.Create<TextFileStructure>();

Mock.Arrange(() => fs.Text).IgnoreInstance().Returns(new byte[23]);

Mock.Replace<string, byte[]>((s, b) => File.WriteAllBytes(s, b)).In<Class1>();

Mock.Arrange(() => File.WriteAllBytes(null, null)).IgnoreArguments().DoInstead(() => called = true);

// act

_sample.WriteBytes(fs);

// assert

Assert.IsTrue(called);

}

The method I'm testing (WriteBytes) is a method in Class1 located in Project A. The two domain classes (TextFileStructure and FileStructure) are located in Project B. I initially had them in Project A, and the test would pass. As soon as I moved the domain classes to Project B, the test failed, because it was actually calling File.WriteAllBytes instead of using the Mock.

Why does it suddenly fail if I move the domain classes to their own project?

answered on 24 Oct 2012, 09:38 PM

MockMsCorlibUpdated.zip

HI Rayne,

I updated the project with User in a different assembly. However, it is working as expected. Please check that your DLL version points to the latest one. I am also sending you the project to have a look.

Kind Regards
Ricky
the Telerik team

Explore the entire Telerik portfolio by downloading Telerik DevCraft Ultimate.