python-escpos/test/test_function_image.py at development · python-escpos/python-escpos · GitHub

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#!/usr/bin/env python

""" Image function tests- Check that image print commands are sent correctly.

:author: `Michael Billington <michael.billington@gmail.com>`_

:organization: `python-escpos <https://github.com/python-escpos>`_

:license: MIT

"""

from __future__ import absolute_import

from __future__ import division

from __future__ import print_function

from __future__ import unicode_literals

import pytest

from PIL import Image

import escpos.printer as printer

from escpos.exceptions import ImageWidthError

# Raster format print

def test_bit_image_black():

"""

Test printing solid black bit image (raster)

"""

instance = printer.Dummy()

instance.image('test/resources/canvas_black.png', impl="bitImageRaster")

assert(instance.output == b'\x1dv0\x00\x01\x00\x01\x00\x80')

# Same thing w/ object created on the fly, rather than a filename

instance = printer.Dummy()

im = Image.new("RGB", (1, 1), (0, 0, 0))

instance.image(im, impl="bitImageRaster")

assert(instance.output == b'\x1dv0\x00\x01\x00\x01\x00\x80')

def test_bit_image_white():

"""

Test printing solid white bit image (raster)

"""

instance = printer.Dummy()

instance.image('test/resources/canvas_white.png', impl="bitImageRaster")

assert(instance.output == b'\x1dv0\x00\x01\x00\x01\x00\x00')

def test_bit_image_both():

"""

Test printing black/white bit image (raster)

"""

instance = printer.Dummy()

instance.image('test/resources/black_white.png', impl="bitImageRaster")

assert(instance.output == b'\x1dv0\x00\x01\x00\x02\x00\xc0\x00')

def test_bit_image_transparent():

"""

Test printing black/transparent bit image (raster)

"""

instance = printer.Dummy()

instance.image('test/resources/black_transparent.png', impl="bitImageRaster")

assert(instance.output == b'\x1dv0\x00\x01\x00\x02\x00\xc0\x00')

# Column format print

def test_bit_image_colfmt_black():

"""

Test printing solid black bit image (column format)

"""

instance = printer.Dummy()

instance.image('test/resources/canvas_black.png', impl="bitImageColumn")

assert(instance.output == b'\x1b3\x10\x1b*!\x01\x00\x80\x00\x00\x0a\x1b2')

def test_bit_image_colfmt_white():

"""

Test printing solid white bit image (column format)

"""

instance = printer.Dummy()

instance.image('test/resources/canvas_white.png', impl="bitImageColumn")

assert(instance.output == b'\x1b3\x10\x1b*!\x01\x00\x00\x00\x00\x0a\x1b2')

def test_bit_image_colfmt_both():

"""

Test printing black/white bit image (column format)

"""

instance = printer.Dummy()

instance.image('test/resources/black_white.png', impl="bitImageColumn")

assert(instance.output == b'\x1b3\x10\x1b*!\x02\x00\x80\x00\x00\x80\x00\x00\x0a\x1b2')

def test_bit_image_colfmt_transparent():

"""

Test printing black/transparent bit image (column format)

"""

instance = printer.Dummy()

instance.image('test/resources/black_transparent.png', impl="bitImageColumn")

assert(instance.output == b'\x1b3\x10\x1b*!\x02\x00\x80\x00\x00\x80\x00\x00\x0a\x1b2')

# Graphics print

def test_graphics_black():

"""

Test printing solid black graphics

"""

instance = printer.Dummy()

instance.image('test/resources/canvas_black.png', impl="graphics")

assert(instance.output == b'\x1d(L\x0b\x000p0\x01\x011\x01\x00\x01\x00\x80\x1d(L\x02\x0002')

def test_graphics_white():

"""

Test printing solid white graphics

"""

instance = printer.Dummy()

instance.image('test/resources/canvas_white.png', impl="graphics")

assert(instance.output == b'\x1d(L\x0b\x000p0\x01\x011\x01\x00\x01\x00\x00\x1d(L\x02\x0002')

def test_graphics_both():

"""

Test printing black/white graphics

"""

instance = printer.Dummy()

instance.image('test/resources/black_white.png', impl="graphics")

assert(instance.output == b'\x1d(L\x0c\x000p0\x01\x011\x02\x00\x02\x00\xc0\x00\x1d(L\x02\x0002')

def test_graphics_transparent():

"""

Test printing black/transparent graphics

"""

instance = printer.Dummy()

instance.image('test/resources/black_transparent.png', impl="graphics")

assert(instance.output == b'\x1d(L\x0c\x000p0\x01\x011\x02\x00\x02\x00\xc0\x00\x1d(L\x02\x0002')

def test_large_graphics():

"""

Test whether 'large' graphics that induce a fragmentation are handled correctly.

"""

instance = printer.Dummy()

instance.image('test/resources/black_white.png', impl="bitImageRaster", fragment_height=1)

assert(instance.output == b'\x1dv0\x00\x01\x00\x01\x00\xc0\x1dv0\x00\x01\x00\x01\x00\x00')

@pytest.fixture

def dummy_with_width():

instance = printer.Dummy()

instance.profile.profile_data = {

'media': {

'width': {

'pixels': 384

}

return instance

def test_width_too_large(dummy_with_width):

"""

Test printing an image that is too large in width.

"""

instance = dummy_with_width

with pytest.raises(ImageWidthError):

instance.image(Image.new("RGB", (385, 200)))

instance.image(Image.new("RGB", (384, 200)))

def test_center_image(dummy_with_width):

instance = dummy_with_width

with pytest.raises(ImageWidthError):

instance.image(Image.new("RGB", (385, 200)), center=True)

instance.image(Image.new("RGB", (384, 200)), center=True)

python-escpos/test/test_function_image.py at development · python-escpos/python-escpos · GitHub

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