How does jest execute a single set of test cases

If there is this documenttests/test.test.ts：

describe('test-group', () => {
    it('t1', async() => {
        console.log('t1');
    });
    it('t2', () => {
        console.log('t2');
    });
});

I just want to run T2 inside, so I can do this:

npx jest tests/test.test.ts --testNamePattern="test-group t2"

Cross levels can be separated by spaces.

Related documents:https://jestjs.io/zh-Hans/doc…