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tests/unit/test_udict.py

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+"""
+测试字典工具。
+无外部依赖，可离线运行。
+"""
+
+from paste.util import udict
+
+
+class TestUdict:
+    """字典工具测试"""
+
+    def test_get_by_path_simple(self):
+        """简单路径读取"""
+        data = {"a": 1, "b": 2}
+        assert udict.get_by_path(data, "a") == 1
+
+    def test_get_by_path_nested(self):
+        """嵌套路径读取"""
+        data = {"a": {"b": {"c": 123}}}
+        assert udict.get_by_path(data, "a.b.c") == 123
+
+    def test_get_by_path_missing(self):
+        """缺失路径处理"""
+        data = {"a": 1}
+        assert udict.get_by_path(data, "b.c.d", "default") == "default"
+
+    def test_get_by_path_none_default(self):
+        """缺失路径无默认值"""
+        data = {"a": 1}
+        assert udict.get_by_path(data, "b") is None
+
+    def test_get_with_default_existing(self):
+        """存在的键读取"""
+        data = {"key": "value"}
+        assert udict.get_with_default(data, "key", "fallback") == "value"
+
+    def test_get_with_default_missing(self):
+        """缺失键使用默认值"""
+        data = {"key": "value"}
+        assert udict.get_with_default(data, "missing", "fallback") == "fallback"
+
+    def test_get_with_default_none_value(self):
+        """值为 None 时使用默认值"""
+        data = {"key": None}
+        assert udict.get_with_default(data, "key", "fallback") == "fallback"