Writing Unit Tests with Jest

test.todo('should handle edge cases');
test.skip('not implemented yet', () => {});
test.only('focus this test', () => {});

Test filtering
Test grouping
Test modification flags
These are test modification flags: 1) todo marks planned tests, 2) skip excludes tests from running, 3) only focuses specific tests, 4) Helps manage test development, 5) Useful for work in progress, 6) Aids in debugging specific tests, 7) Improves test organization, 8) Essential for test maintenance.
Test priorities