add middleware to add signposting links into html head

2026-09-10 22:15:30 +00:00 · 2024-11-22 12:04:15 +01:00
parent 06d745e4a4
commit 8d8a92e5d5
5 changed files with 514 additions and 0 deletions
--- a/tests/test_html_signposting_middleware.py
+++ b/tests/test_html_signposting_middleware.py
@@ -0,0 +1,97 @@
+from bs4 import BeautifulSoup
+from django.http import HttpResponse
+from django_signposting.middleware import HtmlSignpostingMiddleware
+from signposting import LinkRel, Signpost
+
+
+def test_middleware_no_signposting():
+    response = HttpResponse("<html><head></head><body></body></html>")
+    response.status_code = 200
+
+    middleware = HtmlSignpostingMiddleware(lambda request: response)
+    response = middleware(None)
+    assert "link" not in response.content.decode("utf-8")
+
+
+def test_middleware_signposting():
+    response = HttpResponse("<html><head></head><body></body></html>")
+    response.status_code = 200
+    response._signposts = [
+        Signpost(LinkRel.author, "http://example.com")
+    ]
+
+    middleware = HtmlSignpostingMiddleware(lambda request: response)
+    response = middleware(None)
+    content = response.content.decode("utf-8")
+    assert '<link href="http://example.com" rel="author"/>' in content
+
+def test_middleware_signposting_without_head():
+    response = HttpResponse("<html><body></body></html>")
+    response.status_code = 200
+    response._signposts = [
+        Signpost(LinkRel.author, "http://example.com")
+    ]
+
+    middleware = HtmlSignpostingMiddleware(lambda request: response)
+    response = middleware(None)
+    content = response.content.decode("utf-8")
+    assert '<link href="http://example.com" rel="author"/>' in content
+
+
+def test_middleware_multiple_signposts():
+    response = HttpResponse("<html><head></head><body></body></html>")
+    response.status_code = 200
+    response._signposts = [
+        Signpost(LinkRel.author, "http://example.com"),
+        Signpost(LinkRel.author, "http://example2.com"),
+        Signpost(LinkRel.cite_as, "http://example3.com"),
+    ]
+
+    middleware = HtmlSignpostingMiddleware(lambda request: response)
+    response = middleware(None)
+    content = response.content.decode("utf-8")
+    soup = BeautifulSoup(content, "html.parser")
+    assert len(soup.find_all("link")) == 3
+
+
+def test_middleware_signpost_with_content_type():
+    response = HttpResponse("<html><head></head><body></body></html>")
+    response.status_code = 200
+    response._signposts = [
+        Signpost(LinkRel.item, "http://example.com", "text/json")
+    ]
+
+    middleware = HtmlSignpostingMiddleware(lambda request: response)
+    response = middleware(None)
+    content = response.content.decode("utf-8")
+    soup = BeautifulSoup(content, "html.parser")
+    assert len(soup.find_all("link")) == 1
+
+
+def test_middleware_ignore_error_responses():
+    response = HttpResponse("<html><head></head><body></body></html>")
+    response.status_code = 400
+    response._signposts = [
+        Signpost(LinkRel.author, "http://example.com")
+    ]
+
+    middleware = HtmlSignpostingMiddleware(lambda request: response)
+    response = middleware(None)
+    content = response.content.decode("utf-8")
+    soup = BeautifulSoup(content, "html.parser")
+    assert len(soup.find_all("link")) == 1
+
+
+def test_middleware_type_link():
+    response = HttpResponse("<html><head></head><body></body></html>")
+    response.status_code = 200
+    response._signposts = [
+        Signpost(LinkRel.type, "http://schema.org/Dataset")
+    ]
+
+    middleware = HtmlSignpostingMiddleware(lambda request: response)
+    response = middleware(None)
+    content = response.content.decode("utf-8")
+    soup = BeautifulSoup(content, "html.parser")
+    assert len(soup.find_all("link")) == 1
+