Problem

The nightly gauntlet is failing on macOS due to test failures in agent/agentcontainers. The issue is a path mismatch in mock expectations where tests expect paths without the /private prefix, but macOS is resolving them with /private.

Failed run: https://github.com/coder/coder/actions/runs/17088219216
Commit: 60d611fc78fdbd85618b49f489e1ef022003568f
Public issue: coder/coder#19434

Error Details

Multiple test cases in TestAPI/Create are failing with:

expected call at /Users/runner/work/coder/coder/agent/agentcontainers/api_test.go:2468 doesn't match the argument at index 2.
Got: /private/var/folders/rs/pdkp4bzs6r53dmgkthjgwkpm0000gn/T/go-build1803124527/b1322/agentcontainers.test (string)
Want: is equal to /var/folders/rs/pdkp4bzs6r53dmgkthjgwkpm0000gn/T/go-build1803124527/b1322/agentcontainers.test (string)

Affected Tests

• TestAPI/Create/Name
• TestAPI/Create/AppDeduplication
• TestAPI/Create/WithApps
• TestAPI/Create/WithSomeDisplayAppsDisabled
• TestAPI/Create/WithAllDisplayApps
• TestAPI/Create/WithDefaultDisplayApps

Root Cause

On macOS, /var is a symlink to /private/var, and the system is resolving the full path including the /private prefix. The mock expectations in the tests need to account for this macOS-specific behavior.

Solution

The mock expectations should either:

1. Use path resolution to handle the /private prefix on macOS
2. Normalize paths before comparison
3. Use more flexible path matching in the mocks

Assignment

Assigning to @DanielleMaywood as the most recent contributor to the failing test file.