test(langchain): Add basic agent test with Responses call

[alexander-alderman-webb]

Description

Add a test that uses langchain functionality introduced in v1.0 of the library.

Re-use sample Responses API response from openai-agents test.

Issues

Reminders

• Please add tests to validate your changes, and lint your code using tox -e linters.
• Add GH Issue ID & Linear ID (if applicable)
• PR title should use conventional commit style (feat:, fix:, ref:, meta:)
• For external contributors: CONTRIBUTING.md, Sentry SDK development docs, Discord community

[github-actions]

Semver Impact of This PR

🟢 Patch (bug fixes)

📋 Changelog Preview

This is how your changes will appear in the changelog.
Entries from this PR are highlighted with a left border (blockquote style).

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New Features ✨

• (asgi) Add option to disable suppressing chained exceptions by alexander-alderman-webb in #5714
• (logging) Separate ignore lists for events/breadcrumbs and sentry logs by sl0thentr0py in #5698

Bug Fixes 🐛

Anthropic

• Set exception info on streaming span when applicable by alexander-alderman-webb in #5683
• Patch AsyncStream.close() and AsyncMessageStream.close() to finish spans by alexander-alderman-webb in #5675
• Patch Stream.close() and MessageStream.close() to finish spans by alexander-alderman-webb in #5674

Other

• (starlette) Catch Jinja2Templates ImportError by alexander-alderman-webb in #5741

Documentation 📚

• Add note on AI PRs to CONTRIBUTING.md by sentrivana in #5696

Internal Changes 🔧

Langchain

• Add basic agent test with Responses call by alexander-alderman-webb in #5726

• Consolidate available tools assertion by alexander-alderman-webb in #5721
• Consolidate span origin assertion by alexander-alderman-webb in #5723
• Replace mocks with httpx types by alexander-alderman-webb in #5724

Other

• Add -latest alias for each integration test suite by sentrivana in #5706
• Use date-based branch names for toxgen PRs by sentrivana in #5704
• 🤖 Update test matrix with new releases (03/19) by github-actions in #5703
• Add client report tests for span streaming by sentrivana in #5677

Other

• Update CHANGELOG.md by sentrivana in #5685

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_{🤖 This preview updates automatically when you update the PR.}

[github-actions]

Codecov Results 📊

✅ 14 passed | Total: 14 | Pass Rate: 100% | Execution Time: 4.00s

All tests are passing successfully.

✅ Patch coverage is 100.00%. Project has 15535 uncovered lines.

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Generated by Codecov Action

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

Bugbot Autofix prepared a fix for the issue found in the latest run.

• ✅ Fixed: Mutable default argument shared across function calls
  • Replaced the mutable {} default with None and create a fresh dict inside the fixture helper to avoid cross-call state sharing.

Or push these changes by commenting:

@cursor push 8a8c5fff76

Preview (8a8c5fff76)

diff --git a/tests/conftest.py b/tests/conftest.py
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -1039,7 +1039,10 @@
 
 @pytest.fixture
 def get_model_response():
-    def inner(response_content, serialize_pydantic=False, request_headers={}):
+    def inner(response_content, serialize_pydantic=False, request_headers=None):
+        if request_headers is None:
+            request_headers = {}
+
         model_request = HttpxRequest(
             "POST",
             "/responses",

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