Rename unused testing parameter to _

The parameter is an additional marker that the test helper must only be
used for tests.

internal/backend/retry/testing.go

@@ -3,6 +3,6 @@ package retry
 import "testing"
 
 // TestFastRetries reduces the initial retry delay to 1 millisecond
-func TestFastRetries(t testing.TB) {
+func TestFastRetries(_ testing.TB) {
 	fastRetries = true
 }

internal/debug/testing.go

@@ -8,7 +8,7 @@ import (
 
 // TestLogToStderr configures debug to log to stderr if not the debug log is
 // not already configured and returns whether logging was enabled.
-func TestLogToStderr(t testing.TB) bool {
+func TestLogToStderr(_ testing.TB) bool {
 	if opts.isEnabled {
 		return false
 	}
@@ -17,7 +17,7 @@ func TestLogToStderr(t testing.TB) bool {
 	return true
 }
 
-func TestDisableLog(t testing.TB) {
+func TestDisableLog(_ testing.TB) {
 	opts.logger = nil
 	opts.isEnabled = false
 }

internal/repository/testing.go

@@ -34,7 +34,7 @@ func TestUseLowSecurityKDFParameters(t logger) {
 }
 
 // TestBackend returns a fully configured in-memory backend.
-func TestBackend(t testing.TB) restic.Backend {
+func TestBackend(_ testing.TB) restic.Backend {
 	return mem.New()
 }
 

internal/restic/testing.go

@@ -209,7 +209,7 @@ func TestParseHandle(s string, t BlobType) BlobHandle {
 }
 
 // TestSetSnapshotID sets the snapshot's ID.
-func TestSetSnapshotID(t testing.TB, sn *Snapshot, id ID) {
+func TestSetSnapshotID(_ testing.TB, sn *Snapshot, id ID) {
 	sn.id = &id
 }
 

internal/ui/progress/counter_test.go

@@ -59,7 +59,7 @@ func TestCounter(t *testing.T) {
 	t.Log("number of calls:", ncalls)
 }
 
-func TestCounterNil(t *testing.T) {
+func TestCounterNil(_ *testing.T) {
 	// Shouldn't panic.
 	var c *progress.Counter
 	c.Add(1)

internal/ui/progress/updater_test.go

@@ -26,7 +26,8 @@ func TestUpdater(t *testing.T) {
 	test.Assert(t, ncalls > 0, "no progress was reported")
 }
 
-func TestUpdaterStopTwice(t *testing.T) {
+func TestUpdaterStopTwice(_ *testing.T) {
+	// must not panic
 	c := progress.NewUpdater(0, func(runtime time.Duration, final bool) {})
 	c.Done()
 	c.Done()