Added extract output test

IPython/nbconvert/transformers/tests/test_extractoutput.py

@@ -0,0 +1,56
+"""
+Module with tests for the extractoutput transformer
+"""
+
+#-----------------------------------------------------------------------------
+# Copyright (c) 2013, the IPython Development Team.
+#
+# Distributed under the terms of the Modified BSD License.
+#
+# The full license is in the file COPYING.txt, distributed with this software.
+#-----------------------------------------------------------------------------
+
+#-----------------------------------------------------------------------------
+# Imports
+#-----------------------------------------------------------------------------
+
+from .base import TransformerTestsBase
+from ..extractoutput import ExtractOutputTransformer
+
+
+#-----------------------------------------------------------------------------
+# Class
+#-----------------------------------------------------------------------------
+
+class TestExtractOutput(TransformerTestsBase):
+    """Contains test functions for extractoutput.py"""
+
+    def test_constructor(self):
+        """Can a ExtractOutputTransformer be constructed?"""
+        transformer = ExtractOutputTransformer()
+        transformer.enabled = True
+        return transformer
+    
+
+    def test_output(self):
+        """Test the output of the ExtractOutputTransformer"""
+        nb, res = self.test_constructor()(self.build_notebook(), {})
+
+        # Check if text was extracted.
+        assert 'text_filename' in nb.worksheets[0].cells[0].outputs[1]
+        text_filename = nb.worksheets[0].cells[0].outputs[1]['text_filename']
+
+        # Check if png was extracted.
+        assert 'png_filename' in nb.worksheets[0].cells[0].outputs[6]
+        png_filename = nb.worksheets[0].cells[0].outputs[6]['png_filename']
+
+        # Make sure an entry to the resources was added.
+        assert 'outputs' in res
+
+        # Verify text output
+        assert text_filename in res['outputs']
+        self.assertEqual(res['outputs'][text_filename], 'b')
+
+        # Verify png output
+        assert png_filename in res['outputs']
+        self.assertEqual(res['outputs'][png_filename], 'g')