import ( "testing" "github.com/cockroachdb/cockroach/util" ) func TestMyModule(t *testing.T) { // Set up the tester instance tester := util.NewTester(t) // Run test cases tester.RunTestCases([]util.TestCase{ { Name: "Test case 1", Run: func(t *testing.T) { // Implement test case 1 }, }, { Name: "Test case 2", Run: func(t *testing.T) { // Implement test case 2 }, }, }) // Tear down the tester instance tester.Close() }This code sets up a Tester instance and runs two test cases. Each test case includes a name and a function that implements the test logic. Finally, the tester instance is closed. Overall, the Tester struct is a useful utility provided by the "github.com/cockroachdb/cockroach/util" package library for unit testing CockroachDB modules.