public static void Equals___Should_return_false___When_item1_and_item2_have_different_ARGB()
{
// Arrange
var systemUnderTest = new ColorEqualityComparer();
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);
// Act
var actual1 = systemUnderTest.Equals(item1, item2);
var actual2 = systemUnderTest.Equals(item1, item3);
var actual3 = systemUnderTest.Equals(item1, item4);
var actual4 = systemUnderTest.Equals(item1, item5);
var actual5 = systemUnderTest.Equals(item2, item3);
var actual6 = systemUnderTest.Equals(item2, item4);
var actual7 = systemUnderTest.Equals(item2, item5);
var actual8 = systemUnderTest.Equals(item3, item4);
var actual9 = systemUnderTest.Equals(item3, item5);
var actual10 = systemUnderTest.Equals(item4, item5);
// Assert
actual1.Should().BeFalse();
actual2.Should().BeFalse();
actual3.Should().BeFalse();
actual4.Should().BeFalse();
actual5.Should().BeFalse();
actual6.Should().BeFalse();
actual7.Should().BeFalse();
actual8.Should().BeFalse();
actual9.Should().BeFalse();
actual10.Should().BeFalse();
}
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);
}
/// <summary>
/// Add a new entry for the given colour,
/// if needed. Return true if the given
/// colour differs from the current colour,
/// and update the current colour.
/// </summary>
public bool AddColor(Color color)
{
if (!ContainsKey(color))
{
this[color] = Count;
}
bool rc = !ColorEqualityComparer.EqualsJ(
_current, color);
_current = color;
return(rc);
}
public static void Equals___Should_return_true___When_both_items_are_the_same_object_reference()
{
// Arrange
var systemUnderTest = new ColorEqualityComparer();
var item1 = Color.FromArgb(255, 218, 185);
var item2 = Color.PeachPuff;
// Act
var actual1 = systemUnderTest.Equals(item1, item1);
var actual2 = systemUnderTest.Equals(item2, item2);
// Assert
actual1.Should().BeTrue();
actual2.Should().BeTrue();
}
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);
}
public static void Equals___Should_return_true___When_item1_and_item2_have_the_same_ARGB()
{
// Arrange
var systemUnderTest = new ColorEqualityComparer();
var item1 = Color.FromArgb(255, 255, 218, 185);
var item2 = Color.FromArgb(255, 218, 185);
var item3 = Color.PeachPuff;
// Act
var actual1 = systemUnderTest.Equals(item1, item2);
var actual2 = systemUnderTest.Equals(item1, item3);
var actual3 = systemUnderTest.Equals(item2, item3);
// Assert
actual1.Should().BeTrue();
actual2.Should().BeTrue();
actual3.Should().BeTrue();
}
