Function TestLogQueryErrorRoutesInfraCancelToErrorLevel

server/transient_test.go:628–649

TestLogQueryErrorRoutesInfraCancelToErrorLevel locks in the alerting invariant: a worker-death cancellation (gRPC Canceled bubbling up while c.ctx is still healthy) must produce slog.LevelError "Query execution errored.", not Info "Query execution failed." — because the latter gets filtered out of a

(t *testing.T)

// filtered out of alerting and drove the dev/prod observability blind spot
// reported on 2026-05-04 (PR #516).
func TestLogQueryErrorRoutesInfraCancelToErrorLevel(t *testing.T) {
	prevLogger := slog.Default()
	defer slog.SetDefault(prevLogger)

	var buf bytes.Buffer
	slog.SetDefault(slog.New(slog.NewTextHandler(&buf, &slog.HandlerOptions{Level: slog.LevelDebug})))

	c := &clientConn{ctx: context.Background(), username: "test"}
	infraErr := errors.New("flight execute: rpc error: code = Canceled desc = context canceled")
	c.logQueryError("SELECT 1", infraErr)

	out := buf.String()
	if !strings.Contains(out, `level=ERROR`) {
		t.Errorf("expected ERROR level for infra cancel, got:\n%s", out)
	}
	if !strings.Contains(out, `Query execution errored.`) {
		t.Errorf("expected message 'Query execution errored.', got:\n%s", out)
	}
	if strings.Contains(out, `Query execution failed.`) {
		t.Errorf("infra cancel should NOT emit 'Query execution failed.':\n%s", out)
	}
}