public void EqualsIsReflexive()
{
//Given
Entity x = new EntityA(Guid.NewGuid());
//When
//Then
Assert.True(x.Equals(x));
}
public void EqualsIsSymmetric()
{
//Given
Guid id = Guid.NewGuid();
Entity x = new EntityA(id);
Entity y = new EntityA(id);
//When
//Then
Assert.Equal(x.Equals(y), y.Equals(x));
}
public void SameTypeAndDifferentIdIsNotEqual()
{
//Given
Entity x = new EntityA(Guid.NewGuid());
Entity y = new EntityA(Guid.NewGuid());
//When
//Then
Assert.NotEqual(x, y);
Assert.False(x == y);
Assert.True(x != y);
}
public void NullIsNotEqualToNonNull()
{
//Given
Entity x = null;
Entity y = new EntityA(Guid.NewGuid());
//When
//Then
Assert.NotEqual(x, y);
Assert.False(x == y);
Assert.True(x != y);
}
public void DifferentTypeIsNotEqual()
{
//Given
Guid id = Guid.NewGuid();
Entity x = new EntityA(id);
Entity y = new EntityB(id);
//When
//Then
Assert.NotEqual(x, y);
Assert.False(x == y);
Assert.True(x != y);
}
public void SameTypeAndSameIdIsEqual()
{
//Given
Guid id = Guid.NewGuid();
Entity x = new EntityA(id);
Entity y = new EntityA(id);
//When
//Then
Assert.Equal(x, y);
Assert.True(x == y);
Assert.False(x != y);
}
public void EqualsIsTransitive()
{
//Given
Guid id = Guid.NewGuid();
Entity x = new EntityA(id);
Entity y = new EntityA(id);
Entity z = new EntityA(id);
//When
//Then
if (x.Equals(y) && y.Equals(z))
{
Assert.Equal(x, z);
}
}
public void SuccessiveInvocationsReturnSameValue()
{
//Given
Guid id = Guid.NewGuid();
Entity entity1 = new EntityA(id);
Entity entity2 = new EntityA(id);
bool[] results = new bool[10];
//When
for (int i = 0; i < results.Length; i++)
{
results[i] = entity1.Equals(entity2);
}
//Then
Assert.All(results, b => { if (b != results[0])
{
throw new Exception();
}
});
}
