ai-agent-book 精选快照（<2MB 代码与文档，来自 github.com/bojieli/ai-agent-book）

chapter5/conversational-ui/test_customize_malformed_args.py

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+"""模型返回的 apply_edits 参数缺字段/为 null 时，customize 应干净处理而非崩溃。"""
+import json
+import types
+
+import pytest
+
+import agent
+
+
+def _fake_client(arguments):
+    fn = types.SimpleNamespace(name="apply_edits", arguments=arguments)
+    tc = types.SimpleNamespace(id="c1", type="function", function=fn)
+    msg = types.SimpleNamespace(tool_calls=[tc], content=None)
+    resp = types.SimpleNamespace(choices=[types.SimpleNamespace(message=msg)])
+    completions = types.SimpleNamespace(create=lambda **kw: resp)
+    return types.SimpleNamespace(chat=types.SimpleNamespace(completions=completions))
+
+
+@pytest.fixture
+def frontend_dir(tmp_path):
+    (tmp_path / "src").mkdir()
+    (tmp_path / "src" / "App.jsx").write_text("// app", encoding="utf-8")
+    (tmp_path / "src" / "theme.css").write_text("/* css */", encoding="utf-8")
+    return tmp_path
+
+
+def test_files_null_normalized_to_empty(frontend_dir):
+    """files 为显式 null → 归一化为空列表，下游迭代不崩溃。"""
+    args = agent.customize(
+        _fake_client(json.dumps({"summary": "s", "files": None})),
+        "model", frontend_dir, "把按钮改成蓝色")
+    assert args["files"] == []
+
+
+def test_file_entry_missing_path_rejected_cleanly(frontend_dir):
+    """文件项缺 path → 清晰的白名单拒绝（RuntimeError），而非 KeyError。"""
+    with pytest.raises(RuntimeError, match="白名单"):
+        agent.customize(
+            _fake_client(json.dumps({"summary": "s", "files": [{"content": "x"}]})),
+            "model", frontend_dir, "把按钮改成蓝色")
+
+
+def test_normal_edits_pass(frontend_dir):
+    """合法参数不受影响。"""
+    files = [{"path": "src/theme.css", "content": "body { color: red; }"}]
+    args = agent.customize(
+        _fake_client(json.dumps({"summary": "s", "files": files})),
+        "model", frontend_dir, "把文字改成红色")
+    assert args["files"] == files
+
+
+def test_file_entry_missing_content_dropped(frontend_dir):
+    """文件项有合法 path 但缺 content → 丢弃该项，避免下游写盘 f["content"]
+    抛出 KeyError 而中断整个 demo（与缺 path 抛白名单错误对称处理）。"""
+    args = agent.customize(
+        _fake_client(json.dumps({"summary": "s", "files": [{"path": "src/theme.css"}]})),
+        "model", frontend_dir, "把按钮改成蓝色")
+    assert args["files"] == []