[paths] Document and test translate_path

The documentation was inaccurate.

Signed-off-by: Lubomír Sedlář <lsedlar@redhat.com>

tests/test_paths.py

@@ -0,0 +1,36 @@
+#!/usr/bin/env python2
+# -*- coding: utf-8 -*-
+
+import mock
+import unittest
+import os
+import sys
+
+sys.path.insert(0, os.path.join(os.path.dirname(__file__), ".."))
+
+from pungi import paths
+
+
+class TranslatePathTestCase(unittest.TestCase):
+    def test_does_nothing_without_config(self):
+        compose = mock.Mock(conf={})
+        ret = paths.translate_path(compose, '/mnt/koji/compose/rawhide/XYZ')
+        self.assertEqual(ret, '/mnt/koji/compose/rawhide/XYZ')
+
+    def test_translates_prefix(self):
+        compose = mock.Mock(conf={
+            'translate_paths': [('/mnt/koji', 'http://example.com')]
+        })
+        ret = paths.translate_path(compose, '/mnt/koji/compose/rawhide/XYZ')
+        self.assertEqual(ret, 'http://example.com/compose/rawhide/XYZ')
+
+    def test_does_not_translate_not_matching(self):
+        compose = mock.Mock(conf={
+            'translate_paths': [('/mnt/koji', 'http://example.com')]
+        })
+        ret = paths.translate_path(compose, '/mnt/fedora_koji/compose/rawhide/XYZ')
+        self.assertEqual(ret, '/mnt/fedora_koji/compose/rawhide/XYZ')
+
+
+if __name__ == "__main__":
+    unittest.main()