work on framework for testing completion

kitty_tests/completion.py

@@ -0,0 +1,61 @@
+#!/usr/bin/env python
+# License: GPLv3 Copyright: 2022, Kovid Goyal <kovid at kovidgoyal.net>
+
+
+import json
+import shlex
+import subprocess
+import tempfile
+
+from kitty.constants import kitty_tool_exe as kitty_tool
+
+from . import BaseTest
+
+
+class TestCompletion(BaseTest):
+
+    def test_completion(self):
+        completion(self)
+
+
+def has_words(*words):
+    def t(self, result):
+        q = set(words)
+        for group in result['groups']:
+            for m in group['matches']:
+                if m['word'] in words:
+                    q.discard(m['word'])
+        self.assertFalse(q, f'Command line: {self.current_cmd!r}')
+    return t
+
+
+def completion(self: TestCompletion):
+    all_cmds = []
+    all_argv = []
+    all_tests = []
+
+    def add(cmdline: str, *tests):
+        all_cmds.append(cmdline)
+        new_word = cmdline.endswith(' ')
+        if new_word:
+            cmdline = cmdline[:-1]
+        all_argv.append(shlex.split(cmdline))
+        if new_word:
+            all_argv[-1].append('')
+        all_tests.append(tests)
+
+    def run_tool():
+        with tempfile.TemporaryDirectory() as tdir:
+            return json.loads(subprocess.run(
+                [kitty_tool(), '__complete__', 'json'],
+                check=True, stdout=subprocess.PIPE, cwd=tdir, input=json.dumps(all_argv).encode()
+            ).stdout)
+
+    add('kitty ', has_words('@', '@ls'))
+    add('kitty @ l', has_words('ls', 'last-used-layout', 'launch'))
+    add('kitty @l', has_words('@ls', '@last-used-layout', '@launch'))
+
+    for cmd, tests, result in zip(all_cmds, all_tests, run_tool()):
+        self.current_cmd = cmd
+        for test in tests:
+            test(self, result)