def test_output_type():
"""
This function checks the output image format is one of the valid image formats.
"""
output_path = sharpen_image("test_img/mirror.png")
assert imghdr.what(output_path) == imghdr.what(
"test_img/mirror.png"), "file formats do not match, please try again"
def test_sharpened_effect():
"""
This function test that the sharpened effect actually implemented on the inpug image.
"""
input_img = skimage.io.imread("test_img/mirror.png")
output_img= skimage.io.imread(sharpen_image("test_img/mirror.png"))
in_width, in_height,in_rgb = input_img.shape
out_width, out_height,out_rgb = output_img.shape
assert in_rgb != out_rgb, "no effect applied, something is wrong"
def test_output_dimension():
"""
This function checks whether the output image has the same dimension as the input image.
"""
input_img = skimage.io.imread("test_img/mirror.png")
output_img= skimage.io.imread(sharpen_image("test_img/mirror.png"))
in_width, in_height,in_rgb = input_img.shape
out_width, out_height,out_rgb = output_img.shape
assert in_width == out_width and in_height==out_height, "dimension has changed, something is wrong"
def test_sharpen_invalid_input_2():
with pytest.raises(AttributeError):
sharpen_image(123)
def test_sharpen_input_1():
with pytest.raises(FileNotFoundError):
sharpen_image("not a file path")