56 lines
1.9 KiB
TypeScript
56 lines
1.9 KiB
TypeScript
// Copyright 2021 Signal Messenger, LLC
|
|
// SPDX-License-Identifier: AGPL-3.0-only
|
|
|
|
import { assert } from 'chai';
|
|
|
|
import { remove, toggle } from '../../util/setUtil';
|
|
|
|
describe('set utilities', () => {
|
|
const original = new Set([1, 2, 3]);
|
|
|
|
describe('remove', () => {
|
|
it('accepts zero arguments, returning a new set', () => {
|
|
const result = remove(original);
|
|
assert.deepStrictEqual(result, original);
|
|
assert.notStrictEqual(result, original);
|
|
});
|
|
|
|
it('accepts 1 argument, returning a new set', () => {
|
|
const result = remove(original, 2);
|
|
assert.deepStrictEqual(result, new Set([1, 3]));
|
|
assert.deepStrictEqual(original, new Set([1, 2, 3]));
|
|
});
|
|
|
|
it('accepts multiple arguments, returning a new set', () => {
|
|
const result = remove(original, 1, 2, 99);
|
|
assert.deepStrictEqual(result, new Set([3]));
|
|
assert.deepStrictEqual(original, new Set([1, 2, 3]));
|
|
});
|
|
});
|
|
|
|
describe('toggle', () => {
|
|
it('returns a clone if trying to remove an item that was never there', () => {
|
|
const result = toggle(original, 99, false);
|
|
assert.deepStrictEqual(result, new Set([1, 2, 3]));
|
|
assert.notStrictEqual(result, original);
|
|
});
|
|
|
|
it('returns a clone if trying to add an item that was already there', () => {
|
|
const result = toggle(original, 3, true);
|
|
assert.deepStrictEqual(result, new Set([1, 2, 3]));
|
|
assert.notStrictEqual(result, original);
|
|
});
|
|
|
|
it('can add an item to a set', () => {
|
|
const result = toggle(original, 4, true);
|
|
assert.deepStrictEqual(result, new Set([1, 2, 3, 4]));
|
|
assert.deepStrictEqual(original, new Set([1, 2, 3]));
|
|
});
|
|
|
|
it('can remove an item from a set', () => {
|
|
const result = toggle(original, 2, false);
|
|
assert.deepStrictEqual(result, new Set([1, 3]));
|
|
assert.deepStrictEqual(original, new Set([1, 2, 3]));
|
|
});
|
|
});
|
|
});
|