test: Add coverage for empty references

[ARCoder181105]

Description

Resolves #1048 by adding missing defensive test coverage to the /stop endpoint.

Changes Made

• Added explicit assert.Empty checks for references.Trips and references.StopTimes to the standard end-to-end test to enforce the wiki spec guarantees.

Testing

• Verified the new test assertions pass successfully using make test.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: fec3f2bf-2458-45ee-9e81-2f8899865b71

📥 Commits

Reviewing files that changed from the base of the PR and between 589b92f and 38c48dc.

📒 Files selected for processing (1)

• internal/restapi/stop_handler_test.go

📝 Walkthrough

Walkthrough

Two test additions in stop_handler_test.go: TestStopHandlerEndToEnd gains assert.Empty checks on References.Trips and References.StopTimes; a new TestStopHandler_DanglingParentStation seeds a stop with a non-existent parent_station and asserts a 200 OK response with empty References.Stops.

Changes

Stop Handler Test Coverage

Layer / File(s)	Summary
Empty references assertions and dangling parent station test internal/restapi/stop_handler_test.go	TestStopHandlerEndToEnd adds assert.Empty for References.Trips and References.StopTimes. New TestStopHandler_DanglingParentStation seeds an agency and child stop with a non-existent parent_station, calls the stop endpoint, and asserts 200 OK, code OK, and empty References.Stops.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~4 minutes

Possibly related issues

• #1048: This PR directly implements all acceptance criteria from the issue — adding assert.Empty checks for Trips and StopTimes in TestStopHandlerEndToEnd and introducing TestStopHandler_DanglingParentStation to verify graceful handling of a non-existent parent_station.

Possibly related PRs

• OneBusAway/maglev#999: Modifies the same test file with parent_station-related assertions about references.stops population, directly complementary to the dangling parent station scenario added here.
• OneBusAway/maglev#1069: Updates the same end-to-end test to assert specific model.Data.References.* arrays stay empty (for Situations), the same pattern applied here for Trips and StopTimes.
• OneBusAway/maglev#1049: Touches stop_handler reference payload behavior with includeReferences logic, directly relevant to the empty-reference guarantees being asserted in this PR.

Suggested reviewers

• burma-shave

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 33.33% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	The PR implements both acceptance criteria from issue #1048: explicit assert.Empty checks for Trips/StopTimes in the standard test, and a new TestStopHandler_DanglingParentStation test verifying graceful 200 OK response with empty references.stops.
Out of Scope Changes check	✅ Passed	All changes are directly scoped to the test file and address the exact coverage gaps identified in issue #1048 with no extraneous modifications.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'test: Add coverage for empty references' directly corresponds to the main changes: adding explicit assertions for empty references (Trips and StopTimes) and a new test for handling edge cases with empty references.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud