robonen
74fbd0c005
Adds arrays/{move,insert,swap,remove}, collections/set, and comparators/isEqual (NaN/Date/RegExp/Map/Set/cycle-safe), wired into the barrels.
30 lines
809 B
TypeScript
30 lines
809 B
TypeScript
import { describe, expect, it } from 'vitest';
|
|
import { move } from '.';
|
|
|
|
describe('move', () => {
|
|
it('move an item forward', () => {
|
|
expect(move(['a', 'b', 'c'], 0, 2)).toEqual(['b', 'c', 'a']);
|
|
});
|
|
|
|
it('move an item backward', () => {
|
|
expect(move(['a', 'b', 'c'], 2, 0)).toEqual(['c', 'a', 'b']);
|
|
});
|
|
|
|
it('clamp the target index', () => {
|
|
expect(move(['a', 'b', 'c'], 0, 99)).toEqual(['b', 'c', 'a']);
|
|
});
|
|
|
|
it('return a copy unchanged for an out-of-range source', () => {
|
|
const source = ['a', 'b'];
|
|
const result = move(source, 5, 0);
|
|
expect(result).toEqual(['a', 'b']);
|
|
expect(result).not.toBe(source);
|
|
});
|
|
|
|
it('never mutate the source', () => {
|
|
const source = ['a', 'b', 'c'];
|
|
move(source, 0, 2);
|
|
expect(source).toEqual(['a', 'b', 'c']);
|
|
});
|
|
});
|