init commit with repo structure and basic files

tests/labeler/infra/test_renderer.py

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+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