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from PIL import GimpGradientFile, ImagePalette
def test_linear_pos_le_middle():
# Arrange
middle = 0.5
pos = 0.25
# Act
ret = GimpGradientFile.linear(middle, pos)
# Assert
assert ret == 0.25
def test_linear_pos_le_small_middle():
# Arrange
middle = 1e-11
pos = 1e-12
# Act
ret = GimpGradientFile.linear(middle, pos)
# Assert
assert ret == 0.0
def test_linear_pos_gt_middle():
# Arrange
middle = 0.5
pos = 0.75
# Act
ret = GimpGradientFile.linear(middle, pos)
# Assert
assert ret == 0.75
def test_linear_pos_gt_small_middle():
# Arrange
middle = 1 - 1e-11
pos = 1 - 1e-12
# Act
ret = GimpGradientFile.linear(middle, pos)
# Assert
assert ret == 1.0
def test_curved():
# Arrange
middle = 0.5
pos = 0.75
# Act
ret = GimpGradientFile.curved(middle, pos)
# Assert
assert ret == 0.75
def test_sine():
# Arrange
middle = 0.5
pos = 0.75
# Act
ret = GimpGradientFile.sine(middle, pos)
# Assert
assert ret == 0.8535533905932737
def test_sphere_increasing():
# Arrange
middle = 0.5
pos = 0.75
# Act
ret = GimpGradientFile.sphere_increasing(middle, pos)
# Assert
assert round(abs(ret - 0.9682458365518543), 7) == 0
def test_sphere_decreasing():
# Arrange
middle = 0.5
pos = 0.75
# Act
ret = GimpGradientFile.sphere_decreasing(middle, pos)
# Assert
assert ret == 0.3385621722338523
def test_load_via_imagepalette():
# Arrange
test_file = "Tests/images/gimp_gradient.ggr"
# Act
palette = ImagePalette.load(test_file)
# Assert
# load returns raw palette information
assert len(palette[0]) == 1024
assert palette[1] == "RGBA"
def test_load_1_3_via_imagepalette():
# Arrange
# GIMP 1.3 gradient files contain a name field
test_file = "Tests/images/gimp_gradient_with_name.ggr"
# Act
palette = ImagePalette.load(test_file)
# Assert
# load returns raw palette information
assert len(palette[0]) == 1024
assert palette[1] == "RGBA"
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