1 files changed, 22 insertions, 0 deletions
diff --git a/tests/roots/test-util-copyasset_overwrite/myext.py b/tests/roots/test-util-copyasset_overwrite/myext.py
new file mode 100644
index 0000000..544057c
--- /dev/null
+++ b/tests/roots/test-util-copyasset_overwrite/myext.py
@@ -0,0 +1,22 @@
+from pathlib import Path
+
+from sphinx.util.fileutil import copy_asset
+
+
+def _copy_asset_overwrite_hook(app):
+    css = app.outdir / '_static' / 'custom-styles.css'
+    # html_static_path is copied by default
+    assert css.read_text() == '/* html_static_path */\n', 'invalid default text'
+    # warning generated by here
+    copy_asset(
+        Path(__file__).parent.joinpath('myext_static', 'custom-styles.css'),
+        app.outdir / '_static',
+    )
+    # This demonstrates the overwriting
+    assert css.read_text() == '/* extension styles */\n', 'overwriting failed'
+    return []
+
+
+def setup(app):
+    app.connect('html-collect-pages', _copy_asset_overwrite_hook)
+    app.add_css_file('custom-styles.css')