feat: allow more HTML tags in report description (#20908)

tests/unit_tests/notifications/email_tests.py

@@ -0,0 +1,47 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+import pandas as pd
+from flask.ctx import AppContext
+
+
+def test_render_description_with_html(app_context: AppContext) -> None:
+    # `superset.models.helpers`, a dependency of following imports,
+    # requires app context
+    from superset.reports.models import ReportRecipients, ReportRecipientType
+    from superset.reports.notifications.base import NotificationContent
+    from superset.reports.notifications.email import EmailNotification
+
+    content = NotificationContent(
+        name="test alert",
+        embedded_data=pd.DataFrame(
+            {
+                "A": [1, 2, 3],
+                "B": [4, 5, 6],
+                "C": ["111", "222", '<a href="http://www.example.com">333</a>'],
+            }
+        ),
+        description='<p>This is <a href="#">a test</a> alert</p><br />',
+    )
+    email_body = (
+        EmailNotification(
+            recipient=ReportRecipients(type=ReportRecipientType.EMAIL), content=content
+        )
+        ._get_content()
+        .body
+    )
+    assert '<p>This is <a href="#">a test</a> alert</p><br>' in email_body
+    assert '<td>&lt;a href="http://www.example.com"&gt;333&lt;/a&gt;</td>' in email_body