#26 Exception message improvements

[Ralf Ebert]

Take this code:

public class EasyMockMessages {

interface ISomething {
    public int someOperation(String s);
}

@Test
public void someTest() throws Exception {
    ISomething something = EasyMock.createMock(ISomething.class);
    EasyMock.expect(something.someOperation("hello")).andReturn(42);
    EasyMock.replay(something);

    something.someOperation("hello\t");

}

}

This gives the following error now

java.lang.AssertionError:
Unexpected method call someOperation("hello "):
someOperation("hello"): expected: 1, actual: 0

This error could be more helpful by:
- Using a ComparisonFailure exception which would allow to compare the actual and expected method in a Result Comparison Diff in Eclipse IDE (ComparisonFailure still allows a custom plain text message, fake screenshot attached)
- Having the text "Expected method call" in front of the 3rd line (I think this would clarify the message)
- Quoting special characters as "\t", "\n" to make tiny but important differences regarding "invisible" characters visible

[Ralf Ebert]

ComparisonFailure for EasyMock?