Joakim Helleśen
f8236034a3
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106 lines
4 KiB
Python
106 lines
4 KiB
Python
import re
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from typing import TYPE_CHECKING
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from django.template.loader import render_to_string
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from django.test import RequestFactory
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if TYPE_CHECKING:
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from django.core.handlers.wsgi import WSGIRequest
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def _render_meta_tags(context: dict | None = None, path: str = "/test/") -> str:
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"""Helper function to render meta tags template with a test request and given context.
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Args:
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context: Optional dictionary of context variables to pass to the template.
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path: The URL path for the test request.
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Returns:
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The rendered HTML content of the meta tags.
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"""
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request: WSGIRequest = RequestFactory().get(path)
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return render_to_string(
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"includes/meta_tags.html",
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context=context or {},
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request=request,
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)
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def _extract_meta_content(content: str, key: str) -> str:
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"""Extract the content of a meta tag by its name or property.
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Args:
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content: The full HTML content to search within.
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key: The value of the name or property attribute to match.
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Returns:
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The content attribute value of the matched meta tag.
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"""
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pattern: re.Pattern[str] = re.compile(
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rf'<meta\s+(?:name|property)="{re.escape(key)}"\s+content="([^"]*)"\s*/?>',
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)
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match: re.Match[str] | None = pattern.search(content)
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assert match is not None, f"Expected meta tag for {key!r} in rendered output."
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return match.group(1)
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def test_meta_tags_use_request_absolute_url_for_og_url_and_canonical() -> None:
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"""Test that without page_url in context, og:url and canonical tags use request.build_absolute_uri."""
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content: str = _render_meta_tags(path="/drops/")
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assert _extract_meta_content(content, "og:url") == "http://testserver/drops/"
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assert '<link rel="canonical" href="http://testserver/drops/" />' in content
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def test_meta_tags_use_explicit_page_url_for_og_url_and_canonical() -> None:
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"""Test that providing page_url in context results in correct og:url and canonical tags."""
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content: str = _render_meta_tags(
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{
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"page_url": "https://example.com/custom-page/",
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},
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path="/ignored/",
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)
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assert (
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_extract_meta_content(content, "og:url") == "https://example.com/custom-page/"
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)
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assert '<link rel="canonical" href="https://example.com/custom-page/" />' in content
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def test_meta_tags_twitter_card_is_summary_without_image() -> None:
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"""Test that without page_image in context, twitter:card is summary and no twitter:image tag is present."""
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content: str = _render_meta_tags()
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assert _extract_meta_content(content, "twitter:card") == "summary"
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assert 'name="twitter:image"' not in content
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def test_meta_tags_twitter_card_is_summary_large_image_with_page_image() -> None:
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"""Test that providing page_image in context results in twitter:card being summary_large_image and correct og:image and twitter:image tags."""
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content: str = _render_meta_tags({
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"page_image": "https://example.com/image.png",
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"page_image_width": 1200,
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"page_image_height": 630,
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})
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assert _extract_meta_content(content, "twitter:card") == "summary_large_image"
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assert _extract_meta_content(content, "og:image") == "https://example.com/image.png"
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assert (
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_extract_meta_content(content, "twitter:image")
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== "https://example.com/image.png"
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)
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assert _extract_meta_content(content, "og:image:width") == "1200"
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assert _extract_meta_content(content, "og:image:height") == "630"
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def test_meta_tags_render_pagination_links() -> None:
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"""Test that pagination_info in context results in correct prev/next link tags in output."""
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content: str = _render_meta_tags({
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"pagination_info": [
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{"rel": "prev", "url": "https://example.com/page/1/"},
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{"rel": "next", "url": "https://example.com/page/3/"},
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],
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})
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assert '<link rel="prev" href="https://example.com/page/1/" />' in content
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assert '<link rel="next" href="https://example.com/page/3/" />' in content
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