init commit with repo structure and basic files

tests/conftest.py

@@ -0,0 +1 @@
+from fixtures import *  # noqa

tests/fixtures.py

@@ -0,0 +1,25 @@
+import os
+from typing import Callable
+
+import pytest
+
+
+@pytest.fixture
+def current_dir(request) -> str:
+    return os.path.dirname(request.module.__file__)
+
+
+@pytest.fixture
+def get_test_image(current_dir) -> Callable[[str], bytes]:
+    def f(name):
+        return open(os.path.join(current_dir, "test_images", name), "rb").read()
+
+    return f
+
+
+@pytest.fixture
+def save_test_image(current_dir) -> Callable[[str, bytes], None]:
+    def f(name: str, data: bytes):
+        open(os.path.join(current_dir, "test_images", name), "wb").write(data)
+
+    return f

tests/labeler/domain/test_objects.py

@@ -0,0 +1,29 @@
+import math
+
+from labeler.domain.objects import Dimension, MediaDefinition
+
+
+def test_dimension():
+    dimension = Dimension(mm=25.4)
+
+    assert dimension.mm == 25.4
+    assert dimension.inch == 1.0
+
+    assert dimension.in_pixels(dpi=300) == 300
+
+    assert dimension + Dimension(mm=10) == Dimension(mm=35.4)
+    assert dimension * 2 == Dimension(mm=50.8)
+
+    assert dimension / 2 == Dimension(mm=12.7)
+
+
+def test_infinite_media():
+    media = MediaDefinition(
+        width=Dimension(mm=12),
+        length=Dimension(mm=math.inf),
+        minimal_margin_vertical=Dimension(mm=1),
+        minimal_margin_horizontal=Dimension(mm=2),
+        dpi=300,
+    )
+
+    assert media.printable_length == Dimension(mm=math.inf)

tests/labeler/infra/test_renderer.py

@@ -0,0 +1,50 @@
+from labeler.domain.objects import LabelDefinition, Dimension
+from labeler.infra.renderer import PILRenderer
+
+
+def test_simple_label(get_test_image):
+    renderer = PILRenderer()
+    expected_label = get_test_image("simple_label_test.png")
+
+    definition = LabelDefinition(
+        text="dolphin", length=Dimension(mm=40), width=Dimension(mm=10), dpi=600
+    )
+
+    label = renderer.render_label(definition)
+
+    assert label.bytes == expected_label
+
+
+def test_multiline_label(get_test_image):
+    label_text = "dolphin\nis\nawesome"
+    expected_label = get_test_image("multiline_label_test.png")
+
+    renderer = PILRenderer()
+    definition = LabelDefinition(
+        text=label_text, length=Dimension(mm=40), width=Dimension(mm=10), dpi=600
+    )
+
+    label = renderer.render_label(definition)
+    assert label.bytes == expected_label
+
+
+def test_simple_label_no_fixed_width(get_test_image, save_test_image):
+    renderer = PILRenderer()
+    expected_label = get_test_image("no_fixed_width.png")
+
+    definition = LabelDefinition(text="dolphin", width=Dimension(mm=10), dpi=600)
+
+    label = renderer.render_label(definition)
+    assert label.bytes == expected_label
+
+
+def test_multiline_label_no_fixed_width(get_test_image, save_test_image):
+    renderer = PILRenderer()
+    expected_label = get_test_image("multiline_no_fixed_width.png")
+
+    definition = LabelDefinition(
+        text="dolphin\nis\nawesome", width=Dimension(mm=10), dpi=600
+    )
+
+    label = renderer.render_label(definition)
+    assert label.bytes == expected_label