test: added restrict_fk_on_non_standard_key for my cnf

Signed-off-by: Harshit Gangal <[email protected]>

Author: harshit-gangal

go/test/endtoend/vtgate/foreignkey/extra_my.cnf

@@ -0,0 +1,2 @@
+# Foreign key test configuration
+restrict_fk_on_non_standard_key = off

go/test/endtoend/vtgate/foreignkey/fk_test.go

@@ -1504,3 +1504,14 @@ create table temp2(id bigint auto_increment primary key, col varchar(20) not nul
 	mcmp.Exec(`insert into temp1(col) values('a') `)
 	mcmp.ExecAllowAndCompareError(`insert into temp1(col) values('d') `, utils.CompareOptions{})
 }
+
+// TestRestrictFkOnNonStandardKey verifies that restrict_fk_on_non_standard_key is set to off
+func TestRestrictFkOnNonStandardKey(t *testing.T) {
+	mcmp, closer := start(t)
+	defer closer()
+
+	// Check the setting on the MySQL side - this verifies that our extra_my.cnf is being applied
+	result := utils.Exec(t, mcmp.MySQLConn, `SHOW VARIABLES LIKE 'restrict_fk_on_non_standard_key'`)
+	require.Equal(t, 1, len(result.Rows), "Expected exactly one row for restrict_fk_on_non_standard_key variable")
+	require.Equal(t, "OFF", result.Rows[0][1].ToString(), "Expected restrict_fk_on_non_standard_key to be OFF")
+}

go/test/endtoend/vtgate/foreignkey/main_test.go

@@ -101,11 +101,18 @@ func TestMain(m *testing.M) {
 	flag.Parse()
 
 	exitCode := func() int {
+		// Setup EXTRA_MY_CNF for foreign key tests
+		err := setupExtraMyConfig()
+		if err != nil {
+			fmt.Printf("Failed to setup extra MySQL config: %v\n", err)
+			return 1
+		}
+
 		clusterInstance = cluster.NewCluster(Cell, "localhost")
 		defer clusterInstance.Teardown()
 
 		// Start topo server
-		err := clusterInstance.StartTopo()
+		err = clusterInstance.StartTopo()
 		if err != nil {
 			return 1
 		}
@@ -232,3 +239,17 @@ func clearOutAllData(t testing.TB, vtConn *mysql.Conn, mysqlConn *mysql.Conn) {
 		}
 	}
 }
+
+// setupExtraMyConfig sets the EXTRA_MY_CNF environment variable to point to our static config file
+func setupExtraMyConfig() error {
+	// Get the absolute path to the config file in the same directory as this test
+	configPath := "go/test/endtoend/vtgate/foreignkey/extra_my.cnf"
+
+	// Set the environment variable
+	err := os.Setenv("EXTRA_MY_CNF", configPath)
+	if err != nil {
+		return fmt.Errorf("failed to set EXTRA_MY_CNF environment variable: %v", err)
+	}
+
+	return nil
+}