A test for optional_include_mako

common/djangoapps/pipeline_mako/templates/test_exists.html

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+# Only for testing.
+<p>This is test_exists.html</p>

common/djangoapps/pipeline_mako/templates/test_optional_include_mako.html

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+# A test template for optional_include_mako
+
+<%namespace name='static' file='static_content.html'/>
+
+<p>Welcome to test_optional_include_mako.html</p>
+
+<%static:optional_include_mako file="test_exists.html" />
+<%static:optional_include_mako file="definitely_doesnt_exist.html" />

common/djangoapps/pipeline_mako/tests/test_static_content.py

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+"""
+Tests of pipeline_mako/templates/static_content.html
+"""
+
+import unittest
+
+from edxmako.shortcuts import render_to_string
+
+
+class TestStaticContent(unittest.TestCase):
+    """Tests for static_content.html"""
+
+    def test_optional_include_mako(self):
+        out = render_to_string("test_optional_include_mako.html", {})
+        self.assertIn("Welcome to test_optional_include_mako.html", out)
+        self.assertIn("This is test_exists.html", out)