public void WhenIsNull_ThenReturnNull() { var result = StringReplaceExtensions.ReplaceFirst(null, "John", "Peter"); Assert.That(result, Is.Null); }
public void WhenSourceIsNull_ThenReturnNull() { var result = StringReplaceExtensions.ReplaceToken(null, "customerId", 123); Assert.That(result, Is.Null); }