public void YouCanDoArbitraryStuffWhenAMethodIsCalled()
{
// Create a stub.
ISampleClass stub = CreateStub();
// Prepare stub method.
stub.MethodThatReturnsInteger(Arg.Any <string>()).Returns(s => int.Parse(s.Arg <string>()));
// Check that method returns proper values.
stub.MethodThatReturnsInteger("3").Should(Be.EqualTo(3));
stub.MethodThatReturnsInteger("6").Should(Be.EqualTo(6));
}
public void YouCanTellTheStubWhatValueToReturnWhenIsMethodIsCalledWithAnyArgument()
{
// Create a stub.
ISampleClass stub = CreateStub();
// Arrange stub method.
stub.Stub(s => s.MethodThatReturnsInteger(Arg <string> .Is.Anything)).Return(5);
// Now it doesn't matter what the parameter is, we'll always get 5.
stub.MethodThatReturnsInteger("foo").Should(Be.EqualTo(5));
stub.MethodThatReturnsInteger("bar").Should(Be.EqualTo(5));
stub.MethodThatReturnsInteger(null).Should(Be.EqualTo(5));
}
public void YouCanTellTheStubWhatValueToReturnWhenIsMethodIsCalledWithSpecificArguments()
{
// Create a stub.
ISampleClass stub = CreateStub();
// Arrange stub method.
stub.Stub(s => s.MethodThatReturnsInteger("foo")).Return(5);
// Calling the method with "foo" as the parameter will return 5.
stub.MethodThatReturnsInteger("foo").Should(Be.EqualTo(5));
// Calling the method with anything other than "foo" as the parameter will return the default value.
stub.MethodThatReturnsInteger("bar").Should(Be.EqualTo(0));
}
public void YouCanTellTheStubToThrowAnExceptionWhenAMethodIsCalled()
{
// Create a stub.
ISampleClass stub = CreateStub();
// Calling the void method will throw exception.
stub.When(s => s.VoidMethod()).Do(x => { throw new InvalidOperationException(); });
// Calling the method with "foo" as the parameter will throw exception.
stub.MethodThatReturnsInteger("foo").Returns(x => { throw new InvalidOperationException(); });
// Call method that throws exception.
Assert.Throws <InvalidOperationException>(stub.VoidMethod);
Assert.Throws <InvalidOperationException>(() => stub.MethodThatReturnsInteger("foo"));
}
public void YouCanTellTheStubWhatValueToReturnWhenIsMethodIsCalledWithAnyArgument()
{
// Create a stub.
ISampleClass stub = CreateStub();
Mock <ISampleClass> stubClass = Mock.Get(stub);
// Arrange stub method.
stubClass.Setup(s => s.MethodThatReturnsInteger(It.IsAny <string>())).Returns(5);
// Now it doesn't matter what the parameter is, we'll always get 5.
stub.MethodThatReturnsInteger("foo").Should(Be.EqualTo(5));
stub.MethodThatReturnsInteger("bar").Should(Be.EqualTo(5));
stub.MethodThatReturnsInteger(null).Should(Be.EqualTo(5));
}
public void YouCanGetTheArgumentsOfCallsToAMethod()
{
// Create a stub.
ISampleClass stub = CreateStub();
// Call some methods.
stub.MethodThatReturnsInteger("foo");
stub.MethodThatReturnsInteger("bar");
// GetArgumentsForCallsMadeOn() returns a list of arrays that contain
// the parameter values for each call to the method.
IList <object[]> argsPerCall = stub.GetArgumentsForCallsMadeOn(s => s.MethodThatReturnsInteger(null));
argsPerCall[0][0].Should(Be.EqualTo("foo"));
argsPerCall[1][0].Should(Be.EqualTo("bar"));
}
public void YouCanGetFancyWithParametersInStubs()
{
// Create a stub.
ISampleClass stub = CreateStub();
// Arg<>.Matches() allows us to specify a lambda expression that specifies
// whether the return value should be used in this case. Here we're saying
// that we'll return 5 if the string passed in is longer than 2 characters.
stub.Stub(s => s.MethodThatReturnsInteger(Arg <string> .Matches(arg => arg != null && arg.Length > 2))).Return(5);
// Call method with different parameters.
stub.MethodThatReturnsInteger("fooo").Should(Be.EqualTo(5));
stub.MethodThatReturnsInteger("foo").Should(Be.EqualTo(5));
stub.MethodThatReturnsInteger("fo").Should(Be.EqualTo(0));
stub.MethodThatReturnsInteger("f").Should(Be.EqualTo(0));
stub.MethodThatReturnsInteger(null).Should(Be.EqualTo(0));
}
public void CallingMethodsThatReturnValueTypesWillReturnTheDefaultValueForThatType()
{
// Create a stub.
ISampleClass stub = CreateStub();
// Call method that returns value type.
stub.MethodThatReturnsInteger("foo").Should(Be.EqualTo(0));
}
public void YouCanTellTheStubToReturnValuesInALazyWay()
{
// Create a stub.
ISampleClass stub = CreateStub();
int[] count = { 0 };
// Arrange stub method.
stub.MethodThatReturnsInteger(Arg.Any <string>()).Returns(s => count[0]);
// Calling the method will return 1.
count[0]++;
stub.MethodThatReturnsInteger("foo").Should(Be.EqualTo(1));
// Calling the method will return 2.
count[0]++;
stub.MethodThatReturnsInteger("bar").Should(Be.EqualTo(2));
}
public void YouCanDoArbitraryStuffWhenAMethodIsCalled()
{
// Create a stub.
ISampleClass stub = CreateStub();
// Prepare stub method.
stub.Stub(s => s.MethodThatReturnsInteger(Arg <string> .Is.Anything))
.Return(0)
.WhenCalled(method =>
{
var param = (string)method.Arguments[0];
method.ReturnValue = int.Parse(param);
});
// Check that method returns proper values.
stub.MethodThatReturnsInteger("3").Should(Be.EqualTo(3));
stub.MethodThatReturnsInteger("6").Should(Be.EqualTo(6));
}
public void YouCanCheckToSeeIfAMethodWasCalled()
{
// Create a stub.
ISampleClass stub = CreateStub();
// Call some method.
stub.MethodThatReturnsInteger("foo");
// Check that particular method was called.
stub.Received().MethodThatReturnsInteger("foo");
stub.ReceivedWithAnyArgs().MethodThatReturnsInteger(Arg.Any <string>());
}
public void YouCanDoArbitraryStuffWhenAMethodIsCalled()
{
// Create a stub.
ISampleClass stub = CreateStub();
Mock <ISampleClass> stubClass = Mock.Get(stub);
bool before = false;
bool after = false;
// Prepare stub method.
stubClass.Setup(s => s.MethodThatReturnsInteger(It.IsAny <string>()))
.Callback(() => { before = true; })
.Returns <string>(int.Parse)
.Callback <string>(s => { after = true; });
// Check that method returns proper values.
stub.MethodThatReturnsInteger("3").Should(Be.EqualTo(3));
stub.MethodThatReturnsInteger("6").Should(Be.EqualTo(6));
before.Should(Be.True);
after.Should(Be.True);
}
public void YouCanCheckToSeeIfAMethodWasCalledACertainNumberOfTimes()
{
// Create a stub.
ISampleClass stub = CreateStub();
// Call some methods.
stub.MethodThatReturnsInteger("foo");
stub.MethodThatReturnsInteger("bar");
// This will pass.
stub.Received(1).MethodThatReturnsInteger("foo");
// Call the method a second time.
stub.MethodThatReturnsInteger("foo");
// Now this will fail because we called it a second time.
Assert.Throws <ReceivedCallsException>(() => stub.Received(1).MethodThatReturnsInteger("foo"));
// Some other options.
stub.Received(2).MethodThatReturnsInteger("foo");
}
public void YouCanCheckToSeeIfAMethodWasCalled()
{
// Create a stub.
ISampleClass stub = CreateStub();
// Call some method.
stub.MethodThatReturnsInteger("foo");
// Check that particular method was called.
stub.AssertWasCalled(s => s.MethodThatReturnsInteger("foo"));
stub.AssertWasCalled(s => s.MethodThatReturnsInteger(Arg <string> .Is.Anything));
}
public void YouCanCheckToSeeIfAMethodWasNotCalled()
{
// Create a stub.
ISampleClass stub = CreateStub();
// Call some method.
stub.MethodThatReturnsInteger("foo");
// Check that other methods were not called.
stub.AssertWasNotCalled(s => s.MethodThatReturnsInteger("asdfdsf"));
stub.AssertWasNotCalled(s => s.MethodThatReturnsObject(Arg <int> .Is.Anything));
stub.AssertWasNotCalled(s => s.VoidMethod());
}
public void YouCanCheckToSeeIfAMethodWasCalled()
{
// Create a stub.
ISampleClass stub = CreateStub();
Mock <ISampleClass> stubClass = Mock.Get(stub);
// Call some method.
stub.MethodThatReturnsInteger("foo");
// Check that particular method was called.
stubClass.Verify(s => s.MethodThatReturnsInteger("foo"));
stubClass.Verify(s => s.MethodThatReturnsInteger(It.IsAny <string>()));
}
public void YouCanCheckToSeeIfAMethodWasNotCalled()
{
// Create a stub.
ISampleClass stub = CreateStub();
// Call some method.
stub.MethodThatReturnsInteger("foo");
// Check that other methods were not called.
stub.DidNotReceive().MethodThatReturnsInteger("asdfdsf");
stub.DidNotReceiveWithAnyArgs().MethodThatReturnsObject(Arg.Any <int>());
stub.DidNotReceive().VoidMethod();
}
public void YouCanCheckToSeeIfAMethodWasNotCalled()
{
// Create a stub.
ISampleClass stub = CreateStub();
Mock <ISampleClass> stubClass = Mock.Get(stub);
// Call some method.
stub.MethodThatReturnsInteger("foo");
// Check that other methods were not called.
Assert.Throws <MockException>(() => stubClass.Verify(s => s.MethodThatReturnsInteger("asdfdsf")));
Assert.Throws <MockException>(() => stubClass.Verify(s => s.MethodThatReturnsObject(It.IsAny <int>())));
Assert.Throws <MockException>(() => stubClass.Verify(s => s.VoidMethod()));
}
public void YouCanCheckToSeeIfAMethodWasCalledACertainNumberOfTimes()
{
// Create a stub.
ISampleClass stub = CreateStub();
Mock <ISampleClass> stubClass = Mock.Get(stub);
// Call some methods.
stub.MethodThatReturnsInteger("foo");
stub.MethodThatReturnsInteger("bar");
// This will pass.
stubClass.Verify(s => s.MethodThatReturnsInteger("foo"), Times.Once());
// Call the method a second time.
stub.MethodThatReturnsInteger("foo");
// Now this will fail because we called it a second time.
Assert.Throws <MockException>(() => stubClass.Verify(s => s.MethodThatReturnsInteger("foo"), Times.Once()));
// Some other options.
stubClass.Verify(s => s.MethodThatReturnsInteger("foo"), Times.Exactly(2));
stubClass.Verify(s => s.MethodThatReturnsInteger("foo"), Times.AtLeastOnce());
}
public void YouCanTellTheStubToReturnValuesInALazyWay()
{
// Create a stub.
ISampleClass stub = CreateStub();
int[] count = { 0 };
// Arrange stub method.
stub.Stub(s => s.MethodThatReturnsInteger(Arg <string> .Is.Anything))
.Return(0)
.WhenCalled(method =>
{
method.ReturnValue = count[0];
});
// Calling the method will return 1.
count[0]++;
stub.MethodThatReturnsInteger("foo").Should(Be.EqualTo(1));
// Calling the method will return 2.
count[0]++;
stub.MethodThatReturnsInteger("bar").Should(Be.EqualTo(2));
}
public void YouCanCheckToSeeIfAMethodWasCalledACertainNumberOfTimes()
{
// Create a stub.
ISampleClass stub = CreateStub();
// Call some methods.
stub.MethodThatReturnsInteger("foo");
stub.MethodThatReturnsInteger("bar");
// This will pass.
stub.AssertWasCalled(s => s.MethodThatReturnsInteger("foo"), o => o.Repeat.Once());
// Call the method a second time.
stub.MethodThatReturnsInteger("foo");
// Now this will fail because we called it a second time.
Assert.Throws <ExpectationViolationException>(() => stub.AssertWasCalled(s => s.MethodThatReturnsInteger("foo"), o => o.Repeat.Once()));
// Some other options.
stub.AssertWasCalled(s => s.MethodThatReturnsInteger("foo"), o => o.Repeat.Times(2));
stub.AssertWasCalled(s => s.MethodThatReturnsInteger("foo"), o => o.Repeat.AtLeastOnce());
stub.AssertWasCalled(s => s.MethodThatReturnsInteger("foo"), o => o.Repeat.Twice());
}
public void YouCanClearReceivedCalls()
{
// Create a stub.
ISampleClass stub = CreateStub();
// Call some method.
stub.MethodThatReturnsInteger("foo");
// Check that method was called.
stub.Received().MethodThatReturnsInteger("foo");
stub.ClearReceivedCalls();
// Check that method was not called.
stub.DidNotReceiveWithAnyArgs().MethodThatReturnsInteger(Arg.Any <string>());
}
public void YouCanCreateStubByCallingMockRepositoryGenerateStub()
{
// Create a stub.
ISampleClass stub = CreateStub();
// Ensure that its string property is null or empty.
stub.Property.Should(Be.Null.Or.Empty);
int outparam;
string refparam = "test";
// Call some methods.
stub.VoidMethod();
stub.MethodThatReturnsInteger("test").Should(Be.EqualTo(0));
stub.MethodThatReturnsObject(0).Should(Be.Null);
stub.MethodWithOutParameter(out outparam);
outparam.Should(Be.EqualTo(0));
stub.MethodWithRefParameter(ref refparam);
refparam.Should(Be.EqualTo("test"));
}