_join
将数组中的所有元素转换为由
separator 分隔的字符串_join.test.ts
import { _join } from "../../utility/array/_join";
describe('Method _join test:', () => {
test('_join() should return the empty string when receive an empty array', () => {
const received = {
arr: [],
separator: '',
};
const expected = '';
const result = _join(received.arr, received.separator);
expect(result).toBe(expected);
});
test('_join() should return the composed string when receive an array maked by number', () => {
const received = {
arr: [1, 2, 3, 4, 5],
separator: '',
};
const expected = '12345';
const result = _join(received.arr, received.separator);
expect(result).toBe(expected);
});
test('_join() can config your own separator', () => {
const received = {
arr: ['a', 'b', 'c', 'd', 'e'],
separator: '-',
};
const expected = 'a-b-c-d-e';
const result = _join(received.arr, received.separator);
expect(result).toBe(expected);
});
});