def test_find_nearest_colour_by_euclidean_distance_when_no_distance_type_is_specified(
self):
colours_to_find = [Colour("#000000", "hex"), Colour("#010101", "hex")]
origin_colour = Colour("#010101", "hex")
self.assertEqual(
Colour("#010101", "hex"),
find_nearest_colour(colours_to_find, origin_colour, ""))
def test_colour_evaluates_rgb_from_rgba_decimal_when_instantiating(self):
self.assertTupleEqual(
(0, 0, 0),
Colour("0 0 0 0", "rgba_decimal").rgb,
)
self.assertTupleEqual((51, 51, 51),
Colour("0.2 0.2 0.2 0.2", "rgba_decimal").rgb)
self.assertTupleEqual((255, 255, 255),
Colour("1 1 1 1", "rgba_decimal").rgb)
def test_find_nearest_colour_by_euclidean_distance(self):
colours_to_find = [
Colour("#ff0000", "hex"),
Colour("#00ff00", "hex"),
Colour("#0000ff", "hex")
]
origin_colour = Colour("#123456", "hex")
self.assertEqual(
Colour("#0000ff", "hex"),
find_nearest_colour(colours_to_find, origin_colour, ""))
def test_colour_distance_calculates_uniform_distance_when_distance_type_is_specified(
self):
self.assertEqual(
1,
ColourDistance(Colour("#010101", "hex"), Colour("#000000",
"hex"))["uniform"])
def test_colour_distance_calculates_manhattan_distance_when_distance_type_is_specified(
self):
self.assertEqual(
3,
ColourDistance(Colour("#010101", "hex"),
Colour("#000000", "hex"))["manhattan"])
def test_colour_distance_calculates_euclidean_distance_when_distance_type_is_specified(
self):
self.assertEqual(
math.sqrt(3),
ColourDistance(Colour("#010101", "hex"),
Colour("#000000", "hex"))["euclidean"])
def test_colour_distances_equal_when_they_have_same_differences(self):
self.assertEqual(
ColourDistance(Colour("#010101", "hex"), Colour("#000000", "hex")),
ColourDistance(Colour("#020202", "hex"), Colour("#010101", "hex")))
def test_colour_distance_calculates_rgb_respective_differences(self):
self.assertTupleEqual((1, 1, 1),
ColourDistance(Colour("#010101", "hex"),
Colour("#000000",
"hex")).rgb_differences)
def test_colour_outputs_to_text_by_format(self):
colour = Colour("#333333", "hex")
self.assertEqual("#333333", format(colour, "hex"))
self.assertEqual("0.2 0.2 0.2", format(colour, "rgba_decimal"))
def test_colours_subtraction_results_in_a_colour_distance(self):
self.assertEqual(
ColourDistance(Colour("#010101", "hex"), Colour("#000000", "hex")),
Colour("#010101", "hex") - Colour("#000000", "hex"))
def test_colour_unequals_when_rgb_is_different(self):
self.assertNotEqual(Colour("#000000", "hex"), Colour("#123456", "hex"))
def test_colour_equals_when_text_is_exactly_same(self):
self.assertEqual(Colour("#000000", "hex"), Colour("#000000", "hex"))
def test_colour_represents_twice(self):
colour = Colour("#000000", "hex")
self.assertEqual("Colour(original_text=#000000, rgb=(0, 0, 0))",
repr(colour))
self.assertEqual("Colour(original_text=#000000, rgb=(0, 0, 0))",
repr(colour))
def test_colour_evaluates_rgb_from_hex_when_instantiating(self):
self.assertTupleEqual((0, 0, 0), Colour("#000000", "hex").rgb)
def test_colour_keep_original_text_when_instantiating(self):
self.assertEqual("#000000", Colour("#000000", "hex").original_text)