SemanticComparison Unit Test Example

UnitTest.cs

 public class SemanticTests
{
    public class Foo
    {
        public int Bar { get; set; }
        public string Baz { get; set; }
    }

    public class FooDto
    {
        public int Bar { get; set; }
        public string Baz { get; set; }
    }

    [Fact]
    public void TestSameClass()
    {
        var exp = new Foo { Bar = 1, Baz = "1" };
        var act = new Foo { Bar = 1, Baz = "2" };

        //Create proxy for better error messages
        var expected = new Likeness<Foo, Foo>(exp)
            .Without(x => x.Baz).CreateProxy();
        Assert.Equal(expected, act);

        var expectedAll = new Likeness<Foo, Foo>(exp).CreateProxy();
        Assert.NotEqual(expectedAll, act);
    }

    [Fact]
    public void TestInequalityMessage()
    {
        var exp = new Foo { Bar = 1, Baz = "1" };
        var act = new Foo { Bar = 1, Baz = "2" };

        var compAll = new Likeness<Foo, Foo>(exp);
        compAll.ShouldEqual(act);
        var expected = compAll.CreateProxy();
        Assert.Equal(expected, act);
        // Errors:
        /*
         * Message: SemanticComparison.LikenessException : The provided value Models.Tests.Unit.AddressTest+Foo
         * did not match the expected value Models.Tests.Unit.AddressTest+Foo. The following members did not match:
         *   - Baz.
         */
    }

    [Fact]
    public void TestDifferentClassesEquality()
    {
        var exp = new Foo { Bar = 1, Baz = "1" };
        var act = new FooDto { Bar = 1, Baz = "1" };

        var expected = new Likeness<Foo, FooDto>(exp);
        // expected.ShouldEqual(act) will throw on error but returns void
        // expected.CreateProxy() returns regular Foo, so will fail comparing to FooDto
        //This passes, but doesn't show error when not equal
        Assert.True(expected.Equals(act));
    }
}