#55 Add tests and check for command not found

tests/rules/test_has_exists_script.py

@@ -0,0 +1,20 @@
+from mock import Mock, patch
+from thefuck.rules. has_exists_script import match, get_new_command
+
+
+def test_match():
+    with patch('os.path.exists', return_value=True):
+        assert match(Mock(script='main', stderr='main: command not found'),
+                     None)
+        assert match(Mock(script='main --help',
+                          stderr='main: command not found'),
+                     None)
+        assert not match(Mock(script='main', stderr=''), None)
+
+    with patch('os.path.exists', return_value=False):
+        assert not match(Mock(script='main', stderr='main: command not found'),
+                         None)
+
+
+def test_get_new_command():
+    assert get_new_command(Mock(script='main --help'), None) == './main --help'