const expect = require('expect'); const merge = require('./merge.js'); test('merge is a Function', () => { expect(merge).toBeInstanceOf(Function); }); const object = { a: [{ x: 2 }, { y: 4 }], b: 1 }; const other = { a: { z: 3 }, b: [2, 3], c: 'foo' }; t.deepEqual(merge(object, other), { a: [ { x: 2 }, { y: 4 }, { z: 3 } ], b: [ 1, 2, 3 ], c: 'foo' }, 'Merges two objects');