35 lines
796 B
JavaScript
35 lines
796 B
JavaScript
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const assert = require('assert');
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const { Multimap } = require('../../lib/util/multimap');
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describe('Multimap', () => {
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let map;
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beforeEach(() => {
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map = new Multimap();
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});
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it('returns the empty set for an unset key', () => {
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assert.deepEqual(map.get('unknown'), new Set());
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});
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it('returns a set of values for a given key', () => {
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map.set('a', 1);
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map.set('a', 2);
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map.set('a', 1);
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assert.deepEqual(map.get('a'), new Set([1, 2]));
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});
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it('deletes a value for a given key', () => {
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map.set('a', 1);
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map.set('a', 2);
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map.delete('a', 1);
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assert.deepEqual(map.get('a'), new Set([2]));
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map.delete('a', 2);
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assert.deepEqual(map.get('a'), new Set());
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});
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});
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