public void EqualsIsSummetricWithSemanticallyUnequalObjects()
{
// Fixture setup
var source = new ConcreteType("Lorem", "ipsum", "dolor", "sit");
var dest = new DoublePropertyHolder <object, object>();
dest.Property1 = source.Property1;
dest.Property2 = "abc";
var sut = new SemanticComparer <ConcreteType, DoublePropertyHolder <object, object> >();
// Exercise system and verify outcome
Assert.False(sut.Equals(source, dest) && sut.Equals(dest, source));
// Teardown
}
private static void CompareSemantically <TSource, TDestination>(TSource likenObject, TDestination comparee, bool expectedResult)
{
// Fixture setup
var sut = new SemanticComparer <TSource, TDestination>();
// Exercise system
bool result = sut.Equals(likenObject, comparee);
// Verify outcome
Assert.Equal(expectedResult, result);
// Teardown
}
public void SutDoesNotEqualAnonymousObject()
{
// Fixture setup
var sut = new SemanticComparer <ConcreteType, ConcreteType>();
object anonymousObject = new object();
// Exercise system
var result = sut.Equals(new ConcreteType(), anonymousObject);
// Verify outcome
Assert.False(result);
// Teardown
}
public void SutEqualsIdenticalStrongType()
{
// Fixture setup
var ticks = 8293247;
var value = TimeSpan.FromTicks(ticks);
var sut = new SemanticComparer <TimeSpan, TimeSpan>();
var other = TimeSpan.FromTicks(ticks);
// Exercise system
var result = sut.Equals(value, other);
// Verify outcome
Assert.True(result);
// Teardown
}
public void SutWithSemanticEqualityWillReturnTrue()
{
// Fixture setup
var value = new ConcreteType("Lorem", "ipsum", "dolor", "sit");
var sut = new SemanticComparer <ConcreteType, DoublePropertyHolder <object, object> >();
var other = new DoublePropertyHolder <object, object>();
other.Property1 = value.Property1;
other.Property2 = value.Property2;
// Exercise system
var result = sut.Equals(value, other);
// Verify outcome
Assert.True(result);
// Teardown
}
public void EqualsWhenOverriddenSourcePropertyEqualsReturnsFalseWillReturnFalse()
{
// Fixture setup
var equalityResponse = false;
var value = new PropertyHolder <EqualityResponder>();
value.Property = new EqualityResponder(equalityResponse);
var sut = new SemanticComparer <PropertyHolder <EqualityResponder>, PropertyHolder <object> >();
var other = new PropertyHolder <object>();
other.Property = new object();
// Exercise system
var result = sut.Equals(value, other);
// Verify outcome
Assert.Equal(equalityResponse, result);
// Teardown
}
public void SutOfAbstractTypeDoesNotEqualConcreteInstanceWhenPropertyDiffers()
{
// Fixture setup
var value = new ConcreteType("Lorem", "ipsum", "dolor", "sit");
value.Property4 = "Ploeh";
var sut = new SemanticComparer <ConcreteType, AbstractType>();
var other = new ConcreteType();
other.Property1 = value.Property1;
other.Property2 = value.Property2;
other.Property3 = value.Property3;
other.Property4 = "Fnaah";
// Exercise system
var result = sut.Equals(value, other);
// Verify outcome
Assert.False(result);
// Teardown
}
public void SutOfAbstractTypeEqualsConcreteInstancesThatDifferOnlyOnMemberNotDefinedByAbstraction()
{
// Fixture setup
var value = new ConcreteType("Lorem", "ipsum", "dolor", "sit");
value.Property5 = "Ploeh";
var sut = new SemanticComparer <ConcreteType, AbstractType>();
var other = new ConcreteType();
other.Property1 = value.Property1;
other.Property2 = value.Property2;
other.Property3 = value.Property3;
other.Property4 = value.Property4;
other.Property5 = "Fnaah";
// Exercise system
var result = sut.Equals(value, other);
// Verify outcome
Assert.True(result);
// Teardown
}
private static IEnumerable <bool> BothEquals <T>(SemanticComparer <T> sut, T x, T y)
{
yield return(sut.Equals(x, y));
yield return(((IEqualityComparer)sut).Equals(x, y));
}