1  """Tests for _resolve_requests_verify() env var precedence.
 2  
 3  Verifies that custom provider `/models` fetches honour the three supported
 4  CA bundle env vars (HERMES_CA_BUNDLE, REQUESTS_CA_BUNDLE, SSL_CERT_FILE)
 5  in the documented priority order, and that non-existent paths are
 6  skipped gracefully rather than breaking the request.
 7  
 8  No filesystem or network I/O required — we use tmp_path to create real
 9  CA bundle stand-in files and monkeypatch env vars.
10  """
11  
12  import os
13  import sys
14  from pathlib import Path
15  
16  sys.path.insert(0, os.path.join(os.path.dirname(__file__), ".."))
17  
18  import pytest
19  
20  from agent.model_metadata import _resolve_requests_verify
21  
22  
23  _CA_ENV_VARS = ("HERMES_CA_BUNDLE", "REQUESTS_CA_BUNDLE", "SSL_CERT_FILE")
24  
25  
26  @pytest.fixture
27  def clean_env(monkeypatch):
28      """Clear all three SSL env vars so each test starts from a known state."""
29      for var in _CA_ENV_VARS:
30          monkeypatch.delenv(var, raising=False)
31      return monkeypatch
32  
33  
34  @pytest.fixture
35  def bundle_file(tmp_path: Path) -> str:
36      """Create a placeholder CA bundle file and return its absolute path."""
37      path = tmp_path / "ca.pem"
38      path.write_text("-----BEGIN CERTIFICATE-----\nstub\n-----END CERTIFICATE-----\n")
39      return str(path)
40  
41  
42  class TestResolveRequestsVerify:
43      def test_no_env_returns_true(self, clean_env):
44          assert _resolve_requests_verify() is True
45  
46      def test_hermes_ca_bundle_returns_path(self, clean_env, bundle_file):
47          clean_env.setenv("HERMES_CA_BUNDLE", bundle_file)
48          assert _resolve_requests_verify() == bundle_file
49  
50      def test_requests_ca_bundle_returns_path(self, clean_env, bundle_file):
51          clean_env.setenv("REQUESTS_CA_BUNDLE", bundle_file)
52          assert _resolve_requests_verify() == bundle_file
53  
54      def test_ssl_cert_file_returns_path(self, clean_env, bundle_file):
55          clean_env.setenv("SSL_CERT_FILE", bundle_file)
56          assert _resolve_requests_verify() == bundle_file
57  
58      def test_priority_hermes_over_requests(self, clean_env, tmp_path, bundle_file):
59          other = tmp_path / "other.pem"
60          other.write_text("stub")
61          clean_env.setenv("HERMES_CA_BUNDLE", bundle_file)
62          clean_env.setenv("REQUESTS_CA_BUNDLE", str(other))
63          assert _resolve_requests_verify() == bundle_file
64  
65      def test_priority_requests_over_ssl_cert_file(self, clean_env, tmp_path, bundle_file):
66          other = tmp_path / "other.pem"
67          other.write_text("stub")
68          clean_env.setenv("REQUESTS_CA_BUNDLE", bundle_file)
69          clean_env.setenv("SSL_CERT_FILE", str(other))
70          assert _resolve_requests_verify() == bundle_file
71  
72      def test_nonexistent_path_falls_through(self, clean_env, tmp_path, bundle_file):
73          missing = tmp_path / "does_not_exist.pem"
74          clean_env.setenv("HERMES_CA_BUNDLE", str(missing))
75          clean_env.setenv("REQUESTS_CA_BUNDLE", bundle_file)
76          assert _resolve_requests_verify() == bundle_file
77  
78      def test_all_nonexistent_returns_true(self, clean_env, tmp_path):
79          missing1 = tmp_path / "a.pem"
80          missing2 = tmp_path / "b.pem"
81          missing3 = tmp_path / "c.pem"
82          clean_env.setenv("HERMES_CA_BUNDLE", str(missing1))
83          clean_env.setenv("REQUESTS_CA_BUNDLE", str(missing2))
84          clean_env.setenv("SSL_CERT_FILE", str(missing3))
85          assert _resolve_requests_verify() is True
86  
87      def test_empty_string_env_var_ignored(self, clean_env, bundle_file):
88          clean_env.setenv("HERMES_CA_BUNDLE", "")
89          clean_env.setenv("REQUESTS_CA_BUNDLE", bundle_file)
90          assert _resolve_requests_verify() == bundle_file