Add support for blob expressions.

tests/postgres/main_test.go

@@ -31,6 +31,7 @@ const CockroachDB = "COCKROACH_DB"
 func init() {
 	source = os.Getenv("PG_SOURCE")
 	withStatementCaching = os.Getenv("JET_TESTS_WITH_STMT_CACHE") == "true"
+	testRoot = repo.GetTestsDirPath()
 }
 
 func sourceIsCockroachDB() bool {
@@ -46,8 +47,6 @@ func skipForCockroachDB(t *testing.T) {
 func TestMain(m *testing.M) {
 	defer profile.Start().Stop()
 
-	setTestRoot()
-
 	for _, driverName := range []string{"postgres", "pgx"} {
 
 		fmt.Printf("\nRunning postgres tests for driver: %s, caching enabled: %t \n", driverName, withStatementCaching)
@@ -94,10 +93,6 @@ func getConnectionString() string {
 	return dbconfig.PostgresConnectString
 }
 
-func setTestRoot() {
-	testRoot = repo.GetTestsDirPath()
-}
-
 var loggedSQL string
 var loggedSQLArgs []interface{}
 var loggedDebugSQL string