If you are using the Karma/Jasmine stack, use:
fdescribe("when ...", function () { // to [f]ocus on a single group of tests
fit("should ...", function () {...}); // to [f]ocus on a single test case
});
… and:
xdescribe("when ...", function () { // to e[x]clude a group of tests
xit("should ...", function () {...}); // to e[x]clude a test case
});
When you’re on Karma/Mocha:
describe.only("when ...", function () { // to run [only] this group of tests
it.only("should ...", function () {...}); // to run [only] this test case
});
… and:
describe.skip("when ...", function () { // to [skip] running this group of tests
it.skip("should ...", function () {...}); // to [skip] running this test case
});