Added unit test.

tests.py

@@ -1,10 +1,20 @@
 """Installer unit tests."""
 
+try:
+    import configparser
+except ImportError:
+    import ConfigParser as configparser
 import os
 import shutil
+import sys
 import tempfile
 import unittest
 
+try:
+    from unittest.mock import patch
+except ImportError:
+    from mock import patch
+
 import run
 
 
@@ -28,6 +38,25 @@ class ConfigFileTestCase(unittest.TestCase):
             "example.test"])
         self.assertTrue(os.path.exists(self.cfgfile))
 
+    @patch("modoboa_installer.utils.user_input")
+    def test_interactive_mode(self, mock_user_input):
+        """Check interactive mode."""
+        mock_user_input.side_effect = [
+            "0", "0", "", "", "", ""
+        ]
+        with open(os.devnull, "w") as fp:
+            sys.stdout = fp
+            run.main([
+                "--stop-after-configfile-check",
+                "--configfile", self.cfgfile,
+                "--interactive",
+                "example.test"])
+        self.assertTrue(os.path.exists(self.cfgfile))
+        config = configparser.ConfigParser()
+        config.read(self.cfgfile)
+        self.assertEqual(config.get("certificate", "type"), "self-signed")
+        self.assertEqual(config.get("database", "engine"), "postgres")
+
 
 if __name__ == "__main__":
     unittest.main()