test: speed up go tests (#39914)

- Skip race instrumentation of the transpiled SQLite engine
`modernc.org/sqlite/lib` when `GOTEST_FLAGS` contains `-race`, Gitea
code and the driver boundary stay instrumented. `models/issues` drops
from ~10s to ~5s.
- Hash OAuth2 client secrets with `bcrypt.MinCost` in tests, like user
passwords already use the `dummy` hasher. `TestOAuth2` drops from ~22s
to ~2s on the PostgreSQL job.
- Stop the Redis locker's extension loop directly on `Close` instead of
waiting for its next tick, and run the memory locker tests under
`testing/synctest`. `modules/globallock` drops from ~12s to ~4s.

Signed-off-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

models/auth/oauth2.go

@@ -217,7 +217,7 @@ func (app *OAuth2Application) GenerateClientSecret(ctx context.Context) (string,
 	// for code scanners to grab sensitive tokens.
 	clientSecret := "gto_" + base32Lower.EncodeToString(rBytes)
 
-	hashedSecret, err := bcrypt.GenerateFromPassword([]byte(clientSecret), bcrypt.DefaultCost)
+	hashedSecret, err := bcrypt.GenerateFromPassword([]byte(clientSecret), util.Iif(setting.IsInTesting, bcrypt.MinCost, bcrypt.DefaultCost))
 	if err != nil {
 		return "", err
 	}

models/auth/oauth2_test.go

@@ -9,10 +9,13 @@ import (
 
 	auth_model "gitea.dev/models/auth"
 	"gitea.dev/models/unittest"
+	"gitea.dev/modules/setting"
+	"gitea.dev/modules/test"
 	"gitea.dev/modules/timeutil"
 
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
+	"golang.org/x/crypto/bcrypt"
 	"golang.org/x/oauth2"
 )
 
@@ -147,6 +150,13 @@ func TestOAuth2ApplicationAndGrant(t *testing.T) {
 		unittest.AssertExistsAndLoadBean(t, &auth_model.OAuth2Application{ID: 1, ClientSecret: app.ClientSecret})
 		assert.True(t, app.ValidateClientSecret([]byte(secret)))
 		assert.False(t, app.ValidateClientSecret([]byte("fewijfowejgfiowjeoifew")))
+
+		defer test.MockVariableValue(&setting.IsInTesting, false)()
+		_, err = app.GenerateClientSecret(t.Context())
+		require.NoError(t, err)
+		cost, err := bcrypt.Cost([]byte(app.ClientSecret))
+		require.NoError(t, err)
+		assert.Equal(t, bcrypt.DefaultCost, cost)
 	})
 
 	t.Run("CreateOAuth2Application", func(t *testing.T) {
@@ -161,6 +171,7 @@ func TestOAuth2ApplicationAndGrant(t *testing.T) {
 func BenchmarkOAuth2Application_GenerateClientSecret(b *testing.B) {
 	assert.NoError(b, unittest.PrepareTestDatabase())
 	app := unittest.AssertExistsAndLoadBean(b, &auth_model.OAuth2Application{ID: 1})
+	defer test.MockVariableValue(&setting.IsInTesting, false)()
 	for b.Loop() {
 		_, _ = app.GenerateClientSecret(b.Context())
 	}