1

The following links suggest that this should work.

  1. Compare equality between two objects in NUnit

  2. NNunt Documentation

    [TestFixture()]
public class ResponseMessageUnitTests
{

    private Mock<IConfiguration> _IConfigurationMoq;
    private Mock<ICardReader> _ICardReaderMoq;
    private ResponseMessage responseMessage; 

    public ResponseMessageUnitTests()
    {
        //Act
        this._IConfigurationMoq = new Mock<IConfiguration>();
        _IConfigurationMoq.Setup(x => x.REPEATDELAYTIME).Returns(0);
        _IConfigurationMoq.Setup(x => x.COLOUR_WHOLE_RESPONSE_AREA).Returns(true);
        this._ICardReaderMoq = new Mock<ICardReader>();
        this.responseMessage = new ResponseMessage(_IConfigurationMoq.Object, _ICardReaderMoq.Object);
    } 

    [Test(Description =
    "Calling ResponseMessage DisplayAdditionalInfo_Empty Method " +
    "with a Background Colour that populates the fields " +
    "AdditionalInfoLine[1-4] and " +
    "AdditionalInfoNo[1-4]")]
    [TestCase(BACKGROUNDCOLOURS.GOOD)]
    public void ResponseMessage_DisplayAdditionalInfo_Empty(string backgroundColour)

    {
        //Arrange
        _IConfigurationMoq.Setup(x => x.COLOUR_WHOLE_RESPONSE_AREA).Returns(true);
        _IConfigurationMoq.Setup(x => x.REPEATDELAYTIME).Returns(0);

        DisplayLine expected = new DisplayLine(_IConfigurationMoq.Object, null, null, backgroundColour);

        //Act
        responseMessage.DisplayAdditionalInfo_Empty(backgroundColour);

        //Assert
        Assert.AreEqual(expected,responseMessage.AdditionalInfoLine1);
        //Assert.AreEqual(expected, responseMessage.AdditionalInfoLine2);
        //Assert.AreEqual(expected, responseMessage.AdditionalInfoLine3);
        //Assert.AreEqual(expected, responseMessage.AdditionalInfoLine4);
        //Assert.AreEqual(expected, responseMessage.AdditionalInfoNo1);
        //Assert.AreEqual(expected, responseMessage.AdditionalInfoNo2);
        //Assert.AreEqual(expected, responseMessage.AdditionalInfoNo3);
        //Assert.AreEqual(expected, responseMessage.AdditionalInfoNo4);
    }

If I place a breakpoint on the line with the Assert.AreEqual, I get the following:

The objects being compared

The tests fails to my surprise with the following error message:

Message:   Expected: <EPIC.APIS.REST.Models.Android.DisplayLine>
           But was:  <EPIC.APIS.REST.Models.Android.DisplayLine>

I don't understand why... The 2 objects are of the same type and contain the same values?

 <package id="NUnit" version="3.12.0" targetFramework="net462" />
Charlie
  • 12,928
  • 1
  • 27
  • 31
Craig Gers
  • 544
  • 3
  • 9
  • Does your `DisplayLine` class override `Equals`? – Klaus Gütter Dec 18 '20 at 17:57
  • No, it does not have an Equals override. – Craig Gers Dec 18 '20 at 18:05
  • Your link to https://docs.nunit.org/2.2.2/comparisonAsserts.html is legacy documentation... It even says so at the top of the page! I edited your question so that the link goes to the current documentation. Please try to avoid confusing yourself and others with obsolete docs - NUnit 2.2.2 is from 2004! – Charlie Dec 18 '20 at 23:45

1 Answers1

1

well as the threads you linked to suggest, Assert.AreEqual compares as a reference equal unless you override it.

So even though everything looks the same, they're probably different object / references.

You could have a look at the PropertyValuesAreEquals from this answer: https://stackoverflow.com/a/318238/919324 and either compare your objects like that, or override the comparison of the objects

Ron Sijm
  • 8,490
  • 2
  • 31
  • 48
  • To get an intelligent error message, you should also override ToString() on the object. If you don't do that, only the class name is shown for user-defined Types. – Charlie Dec 18 '20 at 23:46
  • Great suggestion. What I did was create an Equals method for my DisplayLine class. I could then call this Equals method in my test. Assert.IsTrue(expected.Equals(responseMessage.AdditionalInfoLine1)); – Craig Gers Dec 21 '20 at 10:39