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changedetection.io/changedetectionio/tests/plugins/test_html_head_extras.py
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dgtlmoon 0ad4090d68
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Extendable theme pluggy implementation for main theme/template <head> section (#4011)
2026-03-27 12:28:13 +01:00

84 lines
3.6 KiB
Python

"""Test that plugins can inject HTML into base.html <head> via get_html_head_extras hookimpl."""
import pytest
from flask import url_for, Response
from changedetectionio.pluggy_interface import hookimpl, plugin_manager
_MY_JS = "console.log('my_module_content loaded');"
_MY_CSS = ".my-module-example { color: red; }"
class _HeadExtrasPlugin:
"""Test plugin that injects tags pointing at its own Flask routes."""
@hookimpl
def get_html_head_extras(self):
css_url = url_for('test_plugin_my_module_content_css')
js_url = url_for('test_plugin_my_module_content_js')
return (
f'<link rel="stylesheet" id="test-head-extra-css" href="{css_url}">\n'
f'<script id="test-head-extra-js" src="{js_url}" defer></script>'
)
@pytest.fixture(scope='module')
def plugin_routes(live_server):
"""Register plugin asset routes once per module (Flask routes can't be added twice)."""
app = live_server.app
@app.route('/test-plugin/my_module_content/css')
def test_plugin_my_module_content_css():
return Response(_MY_CSS, mimetype='text/css',
headers={'Cache-Control': 'max-age=3600'})
@app.route('/test-plugin/my_module_content/js')
def test_plugin_my_module_content_js():
return Response(_MY_JS, mimetype='application/javascript',
headers={'Cache-Control': 'max-age=3600'})
@pytest.fixture
def head_extras_plugin(plugin_routes):
"""Register the hookimpl for one test then unregister it — function-scoped for clean isolation."""
plugin = _HeadExtrasPlugin()
plugin_manager.register(plugin, name="test_head_extras")
yield plugin
plugin_manager.unregister(name="test_head_extras")
def test_plugin_html_injected_into_head(client, live_server, measure_memory_usage, datastore_path, head_extras_plugin):
"""get_html_head_extras output must appear inside <head> in the rendered page."""
res = client.get(url_for("watchlist.index"), follow_redirects=True)
assert res.status_code == 200
assert b'id="test-head-extra-css"' in res.data, "Plugin <link> tag missing from rendered page"
assert b'id="test-head-extra-js"' in res.data, "Plugin <script> tag missing from rendered page"
head_end = res.data.find(b'</head>')
assert head_end != -1
for marker in (b'id="test-head-extra-css"', b'id="test-head-extra-js"'):
pos = res.data.find(marker)
assert pos != -1 and pos < head_end, f"{marker} must appear before </head>"
def test_plugin_js_route_returns_correct_content(client, live_server, measure_memory_usage, datastore_path, plugin_routes):
"""The plugin-registered JS route must return JS with the right Content-Type."""
res = client.get(url_for('test_plugin_my_module_content_js'))
assert res.status_code == 200
assert 'javascript' in res.content_type
assert _MY_JS.encode() in res.data
def test_plugin_css_route_returns_correct_content(client, live_server, measure_memory_usage, datastore_path, plugin_routes):
"""The plugin-registered CSS route must return CSS with the right Content-Type."""
res = client.get(url_for('test_plugin_my_module_content_css'))
assert res.status_code == 200
assert 'css' in res.content_type
assert _MY_CSS.encode() in res.data
def test_no_extras_without_plugin(client, live_server, measure_memory_usage, datastore_path):
"""With no hookimpl registered the markers must not appear (isolation check)."""
res = client.get(url_for("watchlist.index"), follow_redirects=True)
assert b'id="test-head-extra-css"' not in res.data
assert b'id="test-head-extra-js"' not in res.data