Create opensearch_external_url_formatter_test.py

Add a test file for opensearch_external_url_formatter

tests/opensearch_external_url_formatter_test.py

@@ -0,0 +1,48 @@
+from typing import Any
+import os
+import pytest
+
+import requests
+from requests.auth import AuthBase, HTTPBasicAuth
+
+from elastalert.opensearch_external_url_formatter import AbsoluteOpensearchExternalUrlFormatter
+from elastalert.opensearch_external_url_formatter import OpensearchExternalUrlFormatter
+from elastalert.opensearch_external_url_formatter import create_opensearch_external_url_formatter
+
+from elastalert.auth import RefeshableAWSRequestsAuth
+from elastalert.util import EAException
+
+from unittest import mock
+
+
+class AbsoluteFormatTestCase:
+    def __init__(
+         self,
+         base_url: str,
+         relative_url: str,
+         expected_url: str,
+    ) -> None:
+        self.base_url = base_url
+        self.relative_url = relative_url
+        self.expected_url = expected_url
+
+
+@pytest.mark.parametrize("test_case", [
+    # Relative to OpenSearch Dashboards
+    AbsoluteFormatTestCase(
+        base_url='http://opensearch.test.org/_dashboards/',
+        relative_url='app/dev_tools#/console',
+        expected_url='http://opensearch.test.org/_dashboards/app/dev_tools#/console'
+    ),
+])
+
+
+def test_absolute_opensearch_external_url_formatter(
+    test_case: AbsoluteFormatTestCase
+):
+    formatter = AbsoluteOpensearchExternalUrlFormatter(
+        base_url=test_case.base_url
+    )
+    actualUrl = formatter.format(test_case.relative_url)
+    print(actualUrl)
+    assert actualUrl == test_case.expected_url