public void GivenCollection_WhenAddingManyTags_ThenCountIsIncreasedByThatNumberAndContains(int number)
{
// Arrange
var oldCount = _tags.GetCount <string>();
// Act
_tags.AddMany <string>(number);
var newCount = _tags.GetCount <string>();
// Assert
Assert.That(newCount, Is.EqualTo(oldCount + number));
Assert.That(_tags.Contains <string>());
}
