Switch to Postgres when running tests and turn off the fsync setting (#13678)

* Run all tests fasts in postgres

* Moving postgres config to a file

* Addressing PR review comments

* Testing against mysql in the CI to keep things less changed

* Revert "Testing against mysql in the CI to keep things less changed"

This reverts commit fc940c111db269a821c54e005d76df87cb70e031.

* Fixing a test broken in postgres but working in mysql

* Fixing some tests

* Fixing some config tests with postgres

* Fixing the rest of config tests

* Fixing govet error

* Fixing search tests for postgres

config/migrate_test.go

@@ -4,25 +4,34 @@
 package config
 
 import (
-	"fmt"
 	"testing"
 
-	"github.com/mattermost/mattermost-server/v5/store/storetest"
+	"github.com/mattermost/mattermost-server/v5/model"
 	"github.com/mattermost/mattermost-server/v5/testlib"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )
 
+func getDsn(driver string, source string) string {
+	if driver == model.DATABASE_DRIVER_MYSQL {
+		return driver + "://" + source
+	}
+	return source
+}
+
 func TestMigrateDatabaseToFile(t *testing.T) {
 	helper := testlib.NewMainHelper()
 	sqlSettings := helper.GetSQLSettings()
-	defer storetest.CleanupSqlSettings(sqlSettings)
-	sqlDSN := fmt.Sprintf("%s://%s", *sqlSettings.DriverName, *sqlSettings.DataSource)
 	fileDSN := "config.json"
 	files := []string{"IdpCertificateFile", "PublicCertificateFile", "PrivateKeyFile"}
-	data := make([]byte, 5)
-	ds, err := NewDatabaseStore(sqlDSN)
+	data := []byte("aaaaa")
+	ds, err := NewDatabaseStore(getDsn(*sqlSettings.DriverName, *sqlSettings.DataSource))
 	defer ds.Close()
+	defer func() {
+		defaultCfg := &model.Config{}
+		defaultCfg.SetDefaults()
+		ds.Set(defaultCfg)
+	}()
 	require.NoError(t, err)
 	config := ds.Get()
 	config.SamlSettings.IdpCertificateFile = &files[0]
@@ -35,7 +44,7 @@ func TestMigrateDatabaseToFile(t *testing.T) {
 		err = ds.SetFile(file, data)
 		require.NoError(t, err)
 	}
-	err = Migrate(sqlDSN, fileDSN)
+	err = Migrate(getDsn(*sqlSettings.DriverName, *sqlSettings.DataSource), fileDSN)
 	require.NoError(t, err)
 
 	fs, err := NewFileStore(fileDSN, false)
@@ -55,13 +64,11 @@ func TestMigrateDatabaseToFile(t *testing.T) {
 func TestMigrateFileToDatabaseWhenFilePathIsNotSpecified(t *testing.T) {
 	helper := testlib.NewMainHelper()
 	sqlSettings := helper.GetSQLSettings()
-	defer storetest.CleanupSqlSettings(sqlSettings)
-	sqlDSN := fmt.Sprintf("%s://%s", *sqlSettings.DriverName, *sqlSettings.DataSource)
 	fileDSN := "config.json"
 
 	_, err := NewFileStore(fileDSN, true)
 	require.NoError(t, err)
 
-	err = Migrate(fileDSN, sqlDSN)
+	err = Migrate(fileDSN, getDsn(*sqlSettings.DriverName, *sqlSettings.DataSource))
 	require.NoError(t, err)
 }