tests for ScriptExporter

verify that it delegates to PythonExporter
if specified in language_info

IPython/nbconvert/exporters/tests/test_script.py

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+"""Tests for ScriptExporter"""
+
+# Copyright (c) IPython Development Team.
+# Distributed under the terms of the Modified BSD License.
+
+import sys
+
+from IPython.nbformat import v4
+from IPython.utils.py3compat import PY3
+
+from .base import ExportersTestsBase
+from ..script import ScriptExporter
+
+
+class TestScriptExporter(ExportersTestsBase):
+    """Tests for ScriptExporter"""
+
+    exporter_class = ScriptExporter
+
+    def test_constructor(self):
+        """Construct ScriptExporter"""
+        e = self.exporter_class()
+
+    def test_export(self):
+        """ScriptExporter can export something"""
+        (output, resources) = self.exporter_class().from_filename(self._get_notebook())
+        assert len(output) > 0
+    
+    def test_export_python(self):
+        """delegate to custom exporter from language_info"""
+        exporter = self.exporter_class()
+        
+        pynb = v4.new_notebook()
+        (output, resources) = self.exporter_class().from_notebook_node(pynb)
+        self.assertNotIn('# coding: utf-8', output)
+        
+        pynb.metadata.language_info = {
+            'name': 'python',
+            'mimetype': 'text/x-python',
+            'nbconvert_exporter': 'python',
+        }
+        (output, resources) = self.exporter_class().from_notebook_node(pynb)
+        self.assertIn('# coding: utf-8', output)
+
+        
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