Add test for integrity and crossorigin attributes of CDN resources

Author: jazib

requirements/tests.in

@@ -2,3 +2,4 @@ pytest
 pytest-cov
 flask-wtf
 flask-sqlalchemy
+beautifulsoup4

tests/test_bootstrap5/test_integrity.py

@@ -0,0 +1,32 @@
+import pytest
+from bs4 import BeautifulSoup
+from flask import Flask, render_template_string
+
+
+@pytest.fixture
+def app():
+    app = Flask(__name__)
+    app.secret_key = "test"
+    return app
+
+
+def test_cdn_integrity(app):
+    @app.route("/")
+    def index():
+        return render_template_string(
+            "{{ bootstrap.load_css() }}{{ bootstrap.load_js() }}"
+        )
+
+    client = app.test_client()
+    response = client.get("/")
+    html = response.get_data(as_text=True)
+    soup = BeautifulSoup(html, "html.parser")
+
+    css = soup.find("link", rel="stylesheet")
+    js = soup.find("script", src=lambda s: s and "bootstrap" in s)
+
+    bootstrap = app.extensions["bootstrap"]
+    assert css["integrity"] == bootstrap.bootstrap_css_integrity
+    assert js["integrity"] == bootstrap.bootstrap_js_integrity
+    assert css["crossorigin"] == "anonymous"
+    assert js["crossorigin"] == "anonymous"