def test_GrayscaleImage_border(self):
i = GrayscaleImage.load(filepath=self.TEST_IMAGE['path'])
b = i.border(pixels=2)
self.assertEquals(b[0][0], i[0][0])
self.assertEquals(b[0][1], i[0][1])
self.assertEquals(b[0][2], i[0][2])
self.assertEquals(b[1][0], i[1][0])
self.assertEquals(b[1][1], i[1][1])
self.assertEquals(b[3][3], 0)
self.assertNotEquals(b[2][2], i[2][2])
self.assertEquals(b[-1][-1], i[-1][-1])
def load_image(self):
image_filename = self.get_filename()
if not image_filename:
raise SystemExit(1)
self.root.title(image_filename)
try:
return image_filename, GrayscaleImage.load(image_filename)
except IOError:
tkMessageBox.showerror(
"Error while opening image",
"Cannot open %s. Looks like it's not a valid image." % image_filename,
)
return None, None
def test_GrayscaleImage_invert(self):
i = GrayscaleImage.load(filepath=self.TEST_IMAGE['path'])
inv = i.invert()
self.assertEquals(inv.size, i.size)
self.assertEquals(inv[0][0] + i[0][0], 255)
def setUp(self):
assert exists(self.TEST_IMAGE['path']), \
'Test picture missing: %s' % self.TEST_IMAGE['path']
self.i = GrayscaleImage.load(filepath=self.TEST_IMAGE['path'])
