tests: use test font

tests/baseline_data.py

@@ -1,8 +1,10 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
-# Copyright (c) 2017-2020 Richard Hull and contributors
+# Copyright (c) 2017-2024 Richard Hull and contributors
 # See LICENSE.rst for details.
 
+from .helpers import test_font
+
 
 def primitives(device, draw):
     padding = 2
@@ -20,5 +22,5 @@ def primitives(device, draw):
     draw.line((x, bottom, x + shape_width, top), fill="yellow")
     draw.line((x, top, x + shape_width, bottom), fill="yellow")
     x += shape_width + padding
-    draw.text((x, top), 'Hello', fill="cyan")
-    draw.text((x, top + 20), 'World!', fill="purple")
+    draw.text((x, top), 'Hello', font=test_font, fill="cyan")
+    draw.text((x, top + 20), 'World!', font=test_font, fill="purple")

tests/helpers.py

@@ -1,20 +1,21 @@
 # -*- coding: utf-8 -*-
-# Copyright (c) 2017-2023 Richard Hull and contributors
+# Copyright (c) 2017-2024 Richard Hull and contributors
 # See LICENSE.rst for details.
 
 import sys
 import hashlib
 from pathlib import Path
 from io import StringIO
 from contextlib import contextmanager
+from PIL import ImageFont
 
 
 def md5(fname):
     with open(fname, 'rb') as fp:
         return hashlib.md5(fp.read()).hexdigest()
 
 
-def get_reference_image(fname):
+def get_reference_file(fname):
     """
     Get absolute path for ``fname``.
 
@@ -25,6 +26,22 @@ def get_reference_image(fname):
     return str(Path(__file__).resolve().parent.joinpath('reference', fname))
 
 
+def get_reference_pillow_font(fname):
+    """
+    Load :py:class:`PIL.ImageFont` type font from provided fname
+
+    :param fname: The name of the file that contains the PIL.ImageFont
+    :type fname: str
+    :rtype: :py:class:`PIL.ImageFont`
+    """
+    path = get_reference_file(Path('font').joinpath(fname))
+    return ImageFont.load(path)
+
+
+# font used in (most) tests
+test_font = get_reference_pillow_font('courB08.pil')
+
+
 def assert_identical(rname, fname):
     """
     Files that are compared have the same MD5 hash.
@@ -34,7 +51,7 @@ def assert_identical(rname, fname):
     :param fname: Target file location.
     :type fname: str
     """
-    reference = get_reference_image(rname)
+    reference = get_reference_file(rname)
     md5_ref = md5(reference)
     md5_target = md5(fname)
     assert md5_ref == md5_target, \

tests/test_asciiblock.py

@@ -1,6 +1,6 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
-# Copyright (c) 2018-2022 Richard Hull and contributors
+# Copyright (c) 2018-2024 Richard Hull and contributors
 # See LICENSE.rst for details.
 
 """
@@ -10,14 +10,12 @@
 import sys
 import struct
 import hashlib
-from pathlib import Path
 from unittest.mock import patch
 
 from luma.core.render import canvas
 
 from .baseline_data import primitives
-from .helpers import md5, redirect_stdout
-
+from .helpers import md5, redirect_stdout, get_reference_file
 
 def noop():
     pass
@@ -48,7 +46,7 @@ def test_display():
         out = f.getvalue().encode('utf-8')
 
         digest = hashlib.md5(out).hexdigest()
-        fname = Path(__file__).resolve().parent.joinpath('reference', 'asciiblock.txt')
+        fname = get_reference_file('asciiblock.txt')
         assert md5(str(fname)) == digest
 
 

tests/test_gifanim.py

@@ -1,6 +1,6 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
-# Copyright (c) 2017-2022 Richard Hull and contributors
+# Copyright (c) 2017-2024 Richard Hull and contributors
 # See LICENSE.rst for details.
 
 """
@@ -18,7 +18,7 @@
 import pytest
 
 from .baseline_data import primitives
-from .helpers import get_reference_image, assert_identical
+from .helpers import get_reference_file, test_font, assert_identical
 
 
 def test_gifanim_write():
@@ -30,7 +30,7 @@ def test_gifanim_write():
             primitives(device, draw)
 
         with canvas(device) as draw:
-            draw.text((30, 10), text="Blipvert", fill="white")
+            draw.text((30, 10), text="Blipvert", font=test_font, fill="white")
 
         with canvas(device) as draw:
             primitives(device, draw)
@@ -48,7 +48,7 @@ def test_gifanim_noimages():
 
 
 def test_gifanim_max_frames():
-    reference = get_reference_image('anim.gif')
+    reference = get_reference_file('anim.gif')
     img = Image.open(reference)
     with NamedTemporaryFile(suffix='.gif') as temp:
         fname = temp.name

tests/test_transformer.py

@@ -1,6 +1,6 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
-# Copyright (c) 2017-2022 Richard Hull and contributors
+# Copyright (c) 2017-2024 Richard Hull and contributors
 # See LICENSE.rst for details.
 
 """
@@ -14,11 +14,11 @@
 from luma.core.render import canvas
 from luma.emulator.render import transformer
 
-from .helpers import get_reference_image
+from .helpers import get_reference_file, test_font
 
 
 def baseline_im():
-    return pygame.image.load(get_reference_image("capture.png"))
+    return pygame.image.load(get_reference_file("capture.png"))
 
 
 def to_pillow_img(surface):
@@ -31,7 +31,7 @@ def to_pygame_surface(im):
 
 
 def test_none():
-    with open(get_reference_image("capture.png"), "rb") as fp:
+    with open(get_reference_file("capture.png"), "rb") as fp:
         ref = Image.open(fp)
         surface = baseline_im()
         tf = transformer(pygame, 128, 64, 1)
@@ -41,7 +41,7 @@ def test_none():
 
 
 def test_scale2x():
-    with open(get_reference_image("scale2x.png"), "rb") as fp:
+    with open(get_reference_file("scale2x.png"), "rb") as fp:
         ref = Image.open(fp)
         surface = baseline_im()
         tf = transformer(pygame, 128, 64, 2)
@@ -51,7 +51,7 @@ def test_scale2x():
 
 
 def test_smoothscale():
-    with open(get_reference_image("smoothscale.png"), "rb") as fp:
+    with open(get_reference_file("smoothscale.png"), "rb") as fp:
         ref = Image.open(fp)
         surface = baseline_im()
         tf = transformer(pygame, 128, 64, 2)
@@ -61,7 +61,7 @@ def test_smoothscale():
 
 
 def test_identity():
-    with open(get_reference_image("identity.png"), "rb") as fp:
+    with open(get_reference_file("identity.png"), "rb") as fp:
         ref = Image.open(fp)
         surface = baseline_im()
         tf = transformer(pygame, 128, 64, 2)
@@ -71,13 +71,13 @@ def test_identity():
 
 
 def test_led_matrix():
-    with open(get_reference_image("led_matrix.png"), "rb") as fp:
+    with open(get_reference_file("led_matrix.png"), "rb") as fp:
         ref = Image.open(fp)
         device = dummy(width=40, height=24)
         with canvas(device) as draw:
             draw.rectangle(device.bounding_box, outline="white")
-            draw.text((5, 2), "Hello", fill="white")
-            draw.text((5, 10), "World", fill="white")
+            draw.text((5, 2), "Hello", font=test_font, fill="white")
+            draw.text((5, 10), "World", font=test_font, fill="white")
         surface = to_pygame_surface(device.image)
         tf = transformer(pygame, device.width, device.height, 16)
         im = to_pillow_img(tf.led_matrix(surface))
@@ -86,7 +86,7 @@ def test_led_matrix():
 
 
 def test_seven_segment():
-    with open(get_reference_image("seven_segment.png"), "rb") as fp:
+    with open(get_reference_file("seven_segment.png"), "rb") as fp:
         ref = Image.open(fp)
         chars = [
             # Alphabet with omissions