public void Equals_TwoNullInstances_ReturnsTrue()
{
// Arrange
var comparer = new EntityIdentityComparer <string>();
// Act
var result = comparer.Equals(null, null);
// Assert
Assert.True(result);
}
public void GetHashCode_NullInstance_ReturnsZero()
{
// Arrange
var comparer = new EntityIdentityComparer <string>();
// Act
var result = comparer.GetHashCode(null);
// Assert
Assert.Equal(0, result);
}
public void Equals_SecondInstanceNull_ReturnsFalse()
{
// Arrange
var entity1 = new SimpleEntityRepresentation1("test-id");
var comparer = new EntityIdentityComparer <string>();
// Act
var result = comparer.Equals(entity1, null);
// Assert
Assert.False(result);
}
public void Equals_DifferentInstanceTypeWithSameIdValue_ReturnsTrue()
{
// Arrange
var entity1 = new SimpleEntityRepresentation1("test-id");
var entity2 = new SimpleEntityRepresentation2("test-id");
var comparer = new EntityIdentityComparer <string>();
// Act
var result = comparer.Equals(entity1, entity2);
// Assert
Assert.True(result);
}
public void Equals_CustomIdentityComparerAndDistinctIdentityValue_ReturnsFalse()
{
// Arrange
var entity1 = new ComplexEntityRepresentation1(new ComplexIdentity("test-id"));
var entity2 = new ComplexEntityRepresentation1(new ComplexIdentity("test-id2"));
var comparer = new EntityIdentityComparer <ComplexIdentity>(new ComplexIdentityComparer());
// Act
var result = comparer.Equals(entity1, entity2);
// Assert
Assert.False(result);
}
public void GetHashCode_CustomIdentityComparerAndEqualIdentityValue_ReturnsSameValue()
{
// Arrange
var entity1 = new ComplexEntityRepresentation1(new ComplexIdentity("test-id"));
var entity2 = new ComplexEntityRepresentation1(new ComplexIdentity("test-id"));
var comparer = new EntityIdentityComparer <ComplexIdentity>(new ComplexIdentityComparer());
// Act
var result1 = comparer.GetHashCode(entity1);
var result2 = comparer.GetHashCode(entity2);
// Assert
Assert.NotEqual(0, result1);
Assert.Equal(result1, result2);
}
public void GetHashCode_DifferentInstanceTypeWithSameIdValue_ReturnsSameValue()
{
// Arrange
var entity1 = new SimpleEntityRepresentation1("test-id");
var entity2 = new SimpleEntityRepresentation2("test-id");
var comparer = new EntityIdentityComparer <string>();
// Act
var result1 = comparer.GetHashCode(entity1);
var result2 = comparer.GetHashCode(entity2);
// Assert
Assert.NotEqual(0, result1);
Assert.Equal(result1, result2);
}
