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import { expect } from "chai";
import Completion from '../../src/pages/completion';
describe('Completion class', () => {
describe('#constructor', () => {
it('creates new object by iterable items', () => {
new Completion([1,2,3,4,5]);
new Completion([]);
new Completion('hello');
new Completion('');
});
it('creates new object by iterable items', () => {
expect(() => new Completion({ key: 'value' })).to.throw(TypeError);
expect(() => new Completion(12345)).to.throw(TypeError);
});
});
describe('#next', () => {
it('complete next items', () => {
let completion = new Completion([3, 4, 5]);
expect(completion.next()).to.equal(3);
expect(completion.next()).to.equal(4);
expect(completion.next()).to.equal(5);
expect(completion.next()).to.equal(3);
});
it('returns null when empty completions', () => {
let completion = new Completion([]);
expect(completion.next()).to.be.null;
});
});
describe('#prev', () => {
it('complete prev items', () => {
let completion = new Completion([3, 4, 5]);
expect(completion.prev()).to.equal(5);
expect(completion.prev()).to.equal(4);
expect(completion.prev()).to.equal(3);
expect(completion.prev()).to.equal(5);
});
it('returns null when empty completions', () => {
let completion = new Completion([]);
expect(completion.prev()).to.be.null;
});
});
});
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