const {bifurcateBy} = require('./_30s.js');

test('bifurcateBy is a Function', () => {
  expect(bifurcateBy).toBeInstanceOf(Function);
});
test('Splits the collection into two groups', () => {
  expect(bifurcateBy(['beep', 'boop', 'foo', 'bar'], x => x[0] === 'b')).toEqual([
    ['beep', 'boop', 'bar'],
    ['foo']
  ]);
});