42 lines
1.0 KiB
JavaScript
42 lines
1.0 KiB
JavaScript
|
// @flow strict-local
|
||
|
|
|
||
|
|
import assert from 'assert';
|
||
|
|
import {DefaultMap} from '../src/DefaultMap';
|
||
|
|
|
||
|
|
describe('DefaultMap', () => {
|
||
|
|
it('constructs with entries just like Map', () => {
|
||
|
|
let map = new DefaultMap(
|
||
|
|
k => k,
|
||
|
|
[
|
||
|
|
[1, 3],
|
||
|
|
[2, 27],
|
||
|
|
],
|
||
|
|
);
|
||
|
|
assert.equal(map.get(1), 3);
|
||
|
|
assert.deepEqual(Array.from(map.entries()), [
|
||
|
|
[1, 3],
|
||
|
|
[2, 27],
|
||
|
|
]);
|
||
|
|
});
|
||
|
|
|
||
|
|
it("returns a default value based on a key if it doesn't exist", () => {
|
||
|
|
let map = new DefaultMap(k => k);
|
||
|
|
assert.equal(map.get(3), 3);
|
||
|
|
});
|
||
|
|
|
||
|
|
it("sets a default value based on a key if it doesn't exist", () => {
|
||
|
|
let map = new DefaultMap(k => k);
|
||
|
|
map.get(3);
|
||
|
|
assert.deepEqual(Array.from(map.entries()), [[3, 3]]);
|
||
|
|
});
|
||
|
|
|
||
|
|
it('respects undefined/null if it already existed in the map', () => {
|
||
|
|
let map = new DefaultMap<number, number | void | null>(k => k);
|
||
|
|
map.set(3, undefined);
|
||
|
|
assert.equal(map.get(3), undefined);
|
||
|
|
|
||
|
|
map.set(4, null);
|
||
|
|
assert.equal(map.get(4), null);
|
||
|
|
});
|
||
|
|
});
|