Fix test : do not consider deleted migrations

* Change way to detect deleted migrations (diff-filter of 'git diff' command)

tests/functional/test_cmd_line_call.py

@@ -116,6 +116,21 @@ class CallLinterFromCommandLineTest(unittest.TestCase):
         self.assertTrue(lines[2].endswith('IGNORE'))
 
     def test_call_linter_cmd_line_git_id(self):
+        cmd = '{0} {1} d7125d5f4f0cc9623f670a66c54f131acc50032d'.format(
+            self.linter_exec,
+            fixtures.MULTI_COMMIT_PROJECT)
+        fixtures.prepare_git_project(fixtures.MULTI_COMMIT_PROJECT)
+
+        process = Popen(
+            cmd, shell=True, stdout=PIPE, stderr=PIPE)
+        process.wait()
+        self.assertEqual(process.returncode, 0)
+        lines = list(map(utils.clean_bytes_to_str, process.stdout.readlines()))
+        self.assertEqual(len(lines), 3)
+        self.assertTrue(lines[0].endswith('OK'))
+        self.assertTrue(lines[1].startswith('*** Summary'))
+
+    def test_call_linter_with_deleted_migrations(self):
         cmd = '{0} {1} 154ecf6119325cc3b1f3f5a4e709bfbd61a4a4ba'.format(
             self.linter_exec,
             fixtures.DELETED_MIGRATION_PROJECT)