public static void GetHashCode___Should_return_different_hash_code___For_different_Color_objects()
{
// Arrange
var item1 = Color.FromArgb(255, 255, 218, 185);
var item2 = Color.FromArgb(254, 255, 218, 185);
var item3 = Color.FromArgb(255, 254, 218, 185);
var item4 = Color.FromArgb(255, 255, 219, 185);
var item5 = Color.FromArgb(255, 255, 218, 184);
var systemUnderTest = new ColorEqualityComparer();
// Act
var hash1 = systemUnderTest.GetHashCode(item1);
var hash2 = systemUnderTest.GetHashCode(item2);
var hash3 = systemUnderTest.GetHashCode(item3);
var hash4 = systemUnderTest.GetHashCode(item4);
var hash5 = systemUnderTest.GetHashCode(item5);
// Assert
hash1.Should().NotBe(hash2);
hash1.Should().NotBe(hash3);
hash1.Should().NotBe(hash4);
hash1.Should().NotBe(hash5);
hash2.Should().NotBe(hash3);
hash2.Should().NotBe(hash4);
hash2.Should().NotBe(hash5);
hash3.Should().NotBe(hash4);
hash3.Should().NotBe(hash5);
hash4.Should().NotBe(hash5);
}
public static void GetHashCode___Should_return_same_hash_code___For_Color_objects_that_are_equal()
{
// Arrange
var item1 = Color.FromArgb(255, 255, 218, 185);
var item2 = Color.FromArgb(255, 218, 185);
var item3 = Color.PeachPuff;
var systemUnderTest = new ColorEqualityComparer();
// Act
var hash1 = systemUnderTest.GetHashCode(item1);
var hash2 = systemUnderTest.GetHashCode(item2);
var hash3 = systemUnderTest.GetHashCode(item3);
// Assert
hash1.Should().Be(hash2);
hash2.Should().Be(hash3);
}
public static void GetHashCode___Should_return_same_hash_code___When_called_twice_on_same_object_reference()
{
// Arrange
var item1 = Color.FromArgb(255, 218, 185);
var item2 = Color.PeachPuff;
var systemUnderTest = new ColorEqualityComparer();
// Act
var hash1a = systemUnderTest.GetHashCode(item1);
var hash1b = systemUnderTest.GetHashCode(item1);
var hash2a = systemUnderTest.GetHashCode(item2);
var hash2b = systemUnderTest.GetHashCode(item2);
// Assert
hash1a.Should().Be(hash1b);
hash2a.Should().Be(hash2b);
}