fix: eingefügte Bilder beim ersten Speichern dauerhaft ablegen

tests/test_embedded_images.py

@@ -0,0 +1,48 @@
+import base64
+from io import BytesIO
+import importlib.util
+from pathlib import Path
+import sys
+
+from PIL import Image
+
+
+spec = importlib.util.spec_from_file_location(
+    "documentation_embedded_images",
+    Path(__file__).parents[1] / "netbox_documentation" / "embedded_images.py",
+)
+embedded = importlib.util.module_from_spec(spec)
+sys.modules[spec.name] = embedded
+spec.loader.exec_module(embedded)
+
+
+def image_data_url():
+    stream = BytesIO()
+    Image.new("RGB", (2, 2), "red").save(stream, format="PNG")
+    return "data:image/png;base64," + base64.b64encode(stream.getvalue()).decode()
+
+
+def test_embedded_image_is_replaced_with_stored_url():
+    html = f'<p><img alt="Test" src="{image_data_url()}"></p>'
+    stored = []
+
+    def store(mime, content):
+        stored.append((mime, content))
+        return "/media/documentation/bild.png"
+
+    result = embedded.store_embedded_images(html, 1024 * 1024, store)
+
+    assert 'src="/media/documentation/bild.png"' in result
+    assert "data:image/" not in result
+    assert stored[0][0] == "image/png"
+    assert stored[0][1]
+
+
+def test_embedded_images_respect_total_size_limit():
+    html = f'<img src="{image_data_url()}">'
+    try:
+        embedded.validate_embedded_images(html, 1)
+    except embedded.EmbeddedImageError as exc:
+        assert "Gesamtgröße" in str(exc)
+    else:
+        raise AssertionError("Größenlimit wurde nicht angewendet")