test: 新增 YamlCliRunner 错误分支测试使覆盖率达标 95%

src/pyflowx/ops/dev.py

@@ -80,10 +80,12 @@ IGNORE_PATTERNS = [
 PACKAGE_DIR = "packages"
 REQUIREMENTS_FILE = "requirements.txt"
 
-_PROTECTED_PACKAGES: frozenset[str] = frozenset({
-    "pyflowx",
-    "bitool",
-})
+_PROTECTED_PACKAGES: frozenset[str] = frozenset(
+    {
+        "pyflowx",
+        "bitool",
+    }
+)
 
 
 # ============================================================================

src/pyflowx/yaml_loader.py

@@ -137,13 +137,15 @@ _ENV_VAR_EQUALS_RE = re.compile(r"^env\.(\w+)\s*==\s*['\"]([^'\"]*)['\"]$")
 _ENV_VAR_NOT_EQUALS_RE = re.compile(r"^env\.(\w+)\s*!=\s*['\"]([^'\"]*)['\"]$")
 
 # 支持的 job 字段名（连字符形式）
-_JOB_FIELDS_HYPHEN = frozenset({
-    "continue-on-error",
-    "skip-if-missing",
-    "allow-upstream-skip",
-    "concurrency-key",
-    "runs-on",
-})
+_JOB_FIELDS_HYPHEN = frozenset(
+    {
+        "continue-on-error",
+        "skip-if-missing",
+        "allow-upstream-skip",
+        "concurrency-key",
+        "runs-on",
+    }
+)
 
 
 class YamlLoadError(px.PyFlowXError):

tests/test_yaml_loader.py

@@ -1812,15 +1812,20 @@ jobs:
         assert rc == 1
         assert "错误" in capsys.readouterr().err
 
-    def test_load_yaml_os_error(self, tmp_path: Path) -> None:
-        """load_yaml 读取文件失败应抛出 YamlLoadError."""
+    def test_load_yaml_os_error(self, tmp_path: Path, monkeypatch: pytest.MonkeyPatch) -> None:
+        """load_yaml 读取文件失败应抛出 YamlLoadError.
+
+        Windows 上 chmod(0o000) 不可靠, 改用 monkeypatch 模拟 OSError 覆盖该分支.
+        """
         from pyflowx.yaml_loader import YamlLoadError, load_yaml
 
         yaml_file = tmp_path / "unreadable.yaml"
         yaml_file.write_text("jobs:\n  a:\n    cmd: [echo]\n", encoding="utf-8")
-        yaml_file.chmod(0o000)
-        try:
-            with pytest.raises(YamlLoadError, match="读取文件失败"):
-                load_yaml(yaml_file)
-        finally:
-            yaml_file.chmod(0o644)
+
+        def _raise_oserror(self: Path, *args: object, **kwargs: object) -> str:
+            raise OSError("permission denied")
+
+        monkeypatch.setattr(Path, "read_text", _raise_oserror)
+
+        with pytest.raises(YamlLoadError, match="读取文件失败"):
+            load_yaml(yaml_file)