gapfill G4: cover caps.py:54-55 env-get-exception fallback and quota.py:73-74 illegal-env fallback (A9 subset gaps); line numbers verified unchanged after rebase

cloud/tests/test_v6_a9_caps_quota.py

@@ -17,18 +17,30 @@
 只加测试，不改生产代码。
 """
 
+import os
 import sys
 import unittest
 from datetime import datetime, timezone
 from pathlib import Path
+from unittest import mock
 
 try:
-    from cloud.caps import running_count
-    from cloud.quota import monthly_usage, utc_month
+    from cloud.caps import DEFAULT_CAPACITY, resolve_capacity, running_count
+    from cloud.quota import (
+        DEFAULT_QUOTA_USD_MICROS,
+        default_quota_usd_micros,
+        monthly_usage,
+        utc_month,
+    )
 except ImportError:  # discover -s cloud/tests 时把项目根目录补进 sys.path
     sys.path.insert(0, str(Path(__file__).resolve().parents[2]))
-    from cloud.caps import running_count
-    from cloud.quota import monthly_usage, utc_month
+    from cloud.caps import DEFAULT_CAPACITY, resolve_capacity, running_count
+    from cloud.quota import (
+        DEFAULT_QUOTA_USD_MICROS,
+        default_quota_usd_micros,
+        monthly_usage,
+        utc_month,
+    )
 
 
 class CapsRunningCountFallbackTestCase(unittest.TestCase):
@@ -46,6 +58,45 @@ class CapsRunningCountFallbackTestCase(unittest.TestCase):
         self.assertEqual(running_count({"a": {}, "b": {}}), 2)
 
 
+class _RaisingEnv:
+    """get 一律抛异常的环境替身：模拟 env 映射本身坏掉时
+    resolve_capacity 的 except 分支（caps.py:54-55）。"""
+
+    def get(self, key):
+        raise RuntimeError("env broken")
+
+
+class CapsResolveCapacityEnvErrorTestCase(unittest.TestCase):
+    def test_raising_env_falls_back_to_default(self):
+        # caps.py:54-55：source.get 抛异常 -> raw=None -> 默认上限，
+        # 异常不得漏到调用方。
+        self.assertEqual(resolve_capacity(None, env=_RaisingEnv()),
+                         DEFAULT_CAPACITY)
+        self.assertEqual(DEFAULT_CAPACITY, 1)
+
+    def test_normal_env_still_parses(self):
+        # 回落分支不得改变正常解析语义。
+        self.assertEqual(
+            resolve_capacity(None, env={"CLOUD_WORKER_CAPACITY": "4"}), 4)
+
+
+class QuotaDefaultIllegalEnvTestCase(unittest.TestCase):
+    def test_illegal_env_value_falls_back_to_default(self):
+        # quota.py:73-74：int(非法串) 抛 ValueError -> 回落 $10
+        #（DEFAULT_QUOTA_USD_MICROS 微美元），不得把异常漏出。
+        with mock.patch.dict(os.environ,
+                             {"CLOUD_DEFAULT_QUOTA_USD_MICROS": "not-a-number"}):
+            self.assertEqual(default_quota_usd_micros(),
+                             DEFAULT_QUOTA_USD_MICROS)
+        self.assertEqual(DEFAULT_QUOTA_USD_MICROS, 10000000)
+
+    def test_valid_env_value_still_parses(self):
+        # 回落分支不得改变正常解析语义。
+        with mock.patch.dict(os.environ,
+                             {"CLOUD_DEFAULT_QUOTA_USD_MICROS": "250"}):
+            self.assertEqual(default_quota_usd_micros(), 250)
+
+
 class QuotaUtcMonthTestCase(unittest.TestCase):
     def test_utc_month_direct_call(self):
         # quota.py:79-80：显式 now 直接格式化，不走 now=None 分支。