public void CompareTo_ComparableValueObjectWithGreaterComparableComponents_ReturnsLessThanZero(ComparableValueObject a,
ComparableValueObject b)
{
// Act
var result = a.CompareTo(b);
// Assert
result.Should().BeNegative("because argument has greater comparable components than the current object.");
}
public void CompareTo_ComparableValueObjectWithSmallerComparableComponents_ReturnsGreaterThanZero(ComparableValueObject a,
ComparableValueObject b)
{
// Act
var result = a.CompareTo(b);
// Assert
result.Should().BePositive("argument has smaller comparable components than the current object.");
}
public void CompareTo_ComparableValueObjectWithSameComparableComponents_ReturnsZero(ComparableValueObject a,
ComparableValueObject b)
{
// Act
var result = a.CompareTo(b);
// Assert
result.Should().Be(0, "because argument has same comparable components than the current object.");
}
public void CompareTo_PermuteComparableValueObjectsWithSameComparableComponents_ReturnsSameValue(ComparableValueObject a,
ComparableValueObject b)
{
// Act
var result1 = a.CompareTo(b);
var result2 = b.CompareTo(a);
// Assert
result1.Should().Be(result2, "because if a.CompareTo(b) returns zero, then b.CompareTo(a) must also return zero.");
}
public void CompareTo_ComparableValueObjectWithNullReference_ReturnsGreaterThanZero()
{
// Arrange
ComparableValueObject a = NewComparableValueObject();
ComparableValueObject b = null;
// Act
var result = a.CompareTo(b);
// Assert
result.Should().BePositive("because argument is null.");
}
public void CompareTo_PermuteComparableValueObjectsWithDifferentComparableComponents_ReturnsInverseValues(ComparableValueObject a,
ComparableValueObject b)
{
// Act
var result1 = a.CompareTo(b);
var result2 = -b.CompareTo(a);
// Assert
result1.Should().Be(result2,
"because if a.CompareTo(b) returns a value other than zero, then b.CompareTo(a) must return a value of the opposite sign.");
}