def test_list_3col(self):
gradient = [(100, 50, 25), (255, 0, 0), (0, 200, 137)]
for i in range(11):
pct = i / 10.0
color = from_gradient(gradient, pct)
if pct == 0:
assert_col_eq(color, gradient[0])
elif pct < 0.5:
assert_col_eq(from_gradient(gradient, pct), mix_colors(gradient[0], gradient[1], pct * 2))
elif pct == 0.5:
assert_col_eq(from_gradient(gradient, pct), gradient[1])
elif pct < 1:
assert_col_eq(from_gradient(gradient, pct), mix_colors(gradient[1], gradient[2], (pct - 0.5) * 2))
elif pct == 1:
assert_col_eq(from_gradient(gradient, pct), gradient[2])
def test_dict_2col_non_extremes(self):
gradient = {0.25: (100, 0, 255), 0.75: (50, 137, 1)}
assert_col_eq(from_gradient(gradient, 0.0), gradient[0.25])
assert_col_eq(from_gradient(gradient, 0.1), gradient[0.25])
assert_col_eq(from_gradient(gradient, 0.2), gradient[0.25])
for i in range(25, 80, 5):
offset = i / 100.0
assert_col_eq(from_gradient(gradient, offset), mix_colors(gradient[0.25], gradient[0.75], (offset - 0.25) * 2))
assert_col_eq(from_gradient(gradient, 0.8), gradient[0.75])
assert_col_eq(from_gradient(gradient, 0.9), gradient[0.75])
assert_col_eq(from_gradient(gradient, 1), gradient[0.75])
def test_dict_3col(self):
gradient = {0.1: (100, 50, 25), 0.6: (255, 0, 0), 1: (0, 200, 137)}
assert_col_eq(from_gradient(gradient, 0.0), gradient[0.1])
assert_col_eq(from_gradient(gradient, 0.05), gradient[0.1])
assert_col_eq(from_gradient(gradient, 0.1), gradient[0.1])
assert_col_eq(from_gradient(gradient, 0.2), mix_colors(gradient[0.1], gradient[0.6], 0.2))
assert_col_eq(from_gradient(gradient, 0.3), mix_colors(gradient[0.1], gradient[0.6], 0.4))
assert_col_eq(from_gradient(gradient, 0.4), mix_colors(gradient[0.1], gradient[0.6], 0.6))
assert_col_eq(from_gradient(gradient, 0.5), mix_colors(gradient[0.1], gradient[0.6], 0.8))
assert_col_eq(from_gradient(gradient, 0.6), gradient[0.6])
assert_col_eq(from_gradient(gradient, 0.7), mix_colors(gradient[0.6], gradient[1], 0.25))
assert_col_eq(from_gradient(gradient, 0.8), mix_colors(gradient[0.6], gradient[1], 0.5))
assert_col_eq(from_gradient(gradient, 0.9), mix_colors(gradient[0.6], gradient[1], 0.75))
assert_col_eq(from_gradient(gradient, 1.0), gradient[1])
def test_dict_2col_extremes(self):
gradient = {0: (100, 0, 255), 1: (50, 137, 1)}
for i in range(11):
pct = i / 10.0
assert_col_eq(from_gradient(gradient, pct), mix_colors(gradient[0], gradient[1], pct))
def test_list_2col(self):
gradient = [(100, 0, 255), (50, 137, 1)]
for i in range(11):
pct = i / 10.0
assert_col_eq(from_gradient(gradient, pct), mix_colors(*gradient, pct))
def test_rgb(self):
assert_col_eq(mix_colors((255, 0, 0), (0, 0, 0), 0.5), (127, 0, 0))
assert_col_eq(mix_colors((0, 255, 0), (0, 0, 0), 0.5), (0, 127, 0))
assert_col_eq(mix_colors((0, 0, 255), (0, 0, 0), 0.5), (0, 0, 127))
assert_col_eq(mix_colors((255, 0, 0), (0, 255, 128), 0.5), (127, 127, 64))
def test_black(self):
for i in range(11):
offset = i / 10.0
should_be = tuple([int(255 * offset)] * 3)
color = mix_colors(_black, _white, offset)
assert_col_eq(color, should_be)