flake: Windows test compile error in enterprise/coderd/workspaces_test.go (undefined testutil.CacheTFProviders)

[flake-investigator]

CI Run Link: https://github.com/coder/coder/actions/runs/19320202179

Commit Info:

• SHA: f559e51d7f5dce823ac81da44153e03863d1dbcd
• Author: Jake Howell
• Commit: feat: add duration to the Request Logs details (#20756)

Summary:
Nightly gauntlet failed on Windows in job "test-go-pg (windows-2022)" due to a compile error in enterprise/coderd/workspaces_test.go. macOS job was cancelled as a consequence of the overall workflow failing. This is not a matrix cancellation artifact; the Windows job concluded with failure on run_attempt=1.

Key Error Evidence:

• enterprise\coderd\workspaces_test.go:3403:28: undefined: testutil.CacheTFProviders

Relevant Log Excerpt:

=== Errors
enterprise\coderd\workspaces_test.go:3403:28: undefined: testutil.CacheTFProviders

DONE 12023 tests, 130 skipped, 2 failures, 1 error in 407.983s
Process completed with exit code 1.

Root Cause Classification: Code Change

• The test helper enterprise/coderd/workspaces_test.go uses testutil.CacheTFProviders in function downloadProviders().
• testutil/terraform_cache.go defines CacheTFProviders behind a build tag: //go:build linux || darwin, so it is not compiled on Windows. This causes an undefined symbol on Windows.

Code Evidence:

• Reference in enterprise/coderd/workspaces_test.go:
  • Function starts at line 3395; call site around 3403:

  func downloadProviders(t *testing.T, providersTf string) string {
      t.Helper()
      cacheRootDir := filepath.Join(testutil.PersistentCacheDir(t), "terraform_workspace_tags_test")
      templateFiles := map[string]string{"providers.tf": providersTf}
      testName := "TestWorkspaceTagsTerraform"
      cliConfigPath := testutil.CacheTFProviders(t, cacheRootDir, testName, templateFiles)
      t.Logf("Set TF_CLI_CONFIG_FILE=%s", cliConfigPath)
      return cliConfigPath
  }

• Definition of CacheTFProviders (non-Windows only): testutil/terraform_cache.go

  //go:build linux || darwin
  package testutil
  ...
  func CacheTFProviders(t *testing.T, rootDir string, testName string, templateFiles map[string]string) string { ... }

Precise Assignment Analysis:

• Primary (test function blame): The failure occurs in helper function downloadProviders() within enterprise/coderd/workspaces_test.go. The most recent change to this function was introduced by commit f543a87b7871cbea2b9f23e1ac6a8a807608dafb ("chore: cache terraform providers for workspaces terraform tests (#20603)") authored by Kacper Sawicki. That commit replaces the previous in-test provider mirror logic with calls into testutil.CacheTFProviders and is responsible for introducing the Linux/Darwin-only helper usage into this file.
• Diff reference: coder/coder@f543a87
  • It modifies lines ~3390–3407 in enterprise/coderd/workspaces_test.go to call testutil.CacheTFProviders.

Related Behavior in the Same Run:

• There are also two test failures in scaletest workspace updates (e.g., TestRun) involving a 409 conflict ("A workspace build is already active."). Those appear secondary to the compile error and can be addressed separately if they persist; the compile error is deterministic on Windows and is the gating failure here.

Proposed Fix:

• Provide a Windows-compatible implementation of the Terraform provider caching helper (e.g., add a Windows build of testutil/terraform_cache.go or a no-op shim with equivalent behavior on Windows), OR gate the usage in enterprise/coderd/workspaces_test.go behind OS-specific build tags to avoid invoking non-Windows helpers on Windows.

Reproduction:

• On Windows, run the enterprise coderd tests that exercise downloadProviders():
  • go test ./enterprise/coderd -run TestWorkspaceTagsTerraform (or run the nightly job workflow on a Windows runner)
  • Observe compile error: undefined: testutil.CacheTFProviders

Duplicates Search:

• Searched coder/internal for:
  • "CacheTFProviders"
  • "undefined: testutil.CacheTFProviders"
  • "windows tests compile undefined testutil"
• No existing or closed issues found describing this failure.

Ownership Note:

• Based on the primary assignment strategy (function-level blame), the change introducing the failing call was authored by Kacper Sawicki in #20603. Leaving unassigned; please triage to the appropriate owner (test infra/testutil or enterprise workspace tests) if Kacper is not the correct assignee.

[ethanndickson]

@kacpersaw Looks like the new CacheTFProviders helper isn't available on Windows so it's failing to build.

[flake-investigator]

Recurrence observed in nightly gauntlet.

CI Run Link: https://github.com/coder/coder/actions/runs/19489417903

Commit Info:

• SHA: 085370ec6d3ff92830e6403f43b18bed91451c42
• Author: AlexanderSarson
• Commit: chore: add "positron:" to allowed external app protocols (#20803)

Job: test-go-pg (windows-2022)

• run_attempt: 1
• macOS variant succeeded; Windows failed.

Key Error Evidence:

=== Errors
enterprise\coderd\workspaces_test.go:3403:28: undefined: testutil.CacheTFProviders

DONE 12046 tests, 131 skipped, 1 failure, 1 error in 437.594s
Process completed with exit code 1.

Classification: Code Change (Windows-only compile error in tests)

Notes: Same symptom as originally reported; leaving assignment as-is.