Added test of config file.

test_config.py

@@ -0,0 +1,37 @@
+"""The purpose of this test is too test that the config and beards imports
+properly before the bot is run."""
+import unittest
+import importlib
+from skybeard.utils import PythonPathContext
+
+import config
+
+class TestConfig(unittest.TestCase):
+    def test_import_all_beards_return_None(self):
+        for path in config.beard_paths:
+            with PythonPathContext(path):
+                for beard in config.beards:
+                    try:
+                        importlib.import_module(beard)
+                    except ImportError:
+                        pass
+
+        # Once the modules are imported (or not), reimporting will return only
+        # the module. If we get an ImportError here, then one of them has gone
+        # wrong
+
+        successfully_imported_modules = []
+        import_exceptions = []
+        for beard in config.beards:
+            try:
+                mod = importlib.import_module(beard)
+                successfully_imported_modules.append(mod)
+            except ImportError as e:
+                import_exceptions.append(e)
+
+        if import_exceptions:
+            self.fail("We got problems: {}".format("\n".join(str(e) for e in import_exceptions)))
+
+
+if __name__ == '__main__':
+    unittest.main()