Adds test to ensure trailing slashes are handled for fetch_url task

tests/integration_tests/tasks/test_cache.py

@@ -0,0 +1,58 @@
+# 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.
+from unittest import mock
+
+import pytest
+
+from tests.integration_tests.test_app import app
+
+
+@pytest.mark.parametrize(
+    "base_url",
+    [
+        "http://base-url",
+        "http://base-url/",
+    ],
+    ids=["Without trailing slash", "With trailing slash"],
+)
+@mock.patch("superset.tasks.cache.request.Request")
+@mock.patch("superset.tasks.cache.request.urlopen")
+def test_fetch_url(mock_urlopen, mock_request_cls, base_url):
+    from superset.tasks.cache import fetch_url
+
+    mock_request = mock.MagicMock()
+    mock_request_cls.return_value = mock_request
+
+    mock_urlopen.return_value = mock.MagicMock()
+    mock_urlopen.return_value.code = 200
+
+    app.config["WEBDRIVER_BASEURL"] = base_url
+    headers = {"key": "value"}
+    data = "data"
+    data_encoded = b"data"
+
+    result = fetch_url(data, headers)
+
+    assert data == result["success"]
+    mock_request_cls.assert_called_once_with(
+        "http://base-url/superset/warm_up_cache/",
+        data=data_encoded,
+        headers=headers,
+        method="PUT",
+    )
+    # assert the same Request object is used
+    mock_urlopen.assert_called_once_with(mock_request, timeout=mock.ANY)