#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'

thefuck/rules/has_exists_script.py

@@ -1,8 +1,10 @@
 import os
 
+
 def match(command, settings):
-	exist = os.path.exists(command.script)
+    return os.path.exists(command.script.split()[0]) \
-	return exist
+        and 'command not found' in command.stderr
+
 
 def get_new_command(command, settings):
     return './{}'.format(command.script)