78 lines
2.8 KiB
TypeScript
78 lines
2.8 KiB
TypeScript
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/*
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Copyright 2021 The Matrix.org Foundation C.I.C.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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import {iterableDiff, iterableUnion} from "../../src/utils/iterables";
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describe('iterables', () => {
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describe('iterableUnion', () => {
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it('should return a union', () => {
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const a = [1, 2, 3];
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const b = [1, 2, 4]; // note diff
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const result = iterableUnion(a, b);
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expect(result).toBeDefined();
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expect(result).toHaveLength(2);
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expect(result).toEqual([1, 2]);
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});
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it('should return an empty array on no matches', () => {
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const a = [1, 2, 3];
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const b = [4, 5, 6];
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const result = iterableUnion(a, b);
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expect(result).toBeDefined();
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expect(result).toHaveLength(0);
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});
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});
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describe('iterableDiff', () => {
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it('should see added from A->B', () => {
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const a = [1, 2, 3];
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const b = [1, 2, 3, 4];
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const result = iterableDiff(a, b);
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expect(result).toBeDefined();
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expect(result.added).toBeDefined();
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expect(result.removed).toBeDefined();
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expect(result.added).toHaveLength(1);
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expect(result.removed).toHaveLength(0);
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expect(result.added).toEqual([4]);
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});
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it('should see removed from A->B', () => {
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const a = [1, 2, 3];
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const b = [1, 2];
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const result = iterableDiff(a, b);
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expect(result).toBeDefined();
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expect(result.added).toBeDefined();
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expect(result.removed).toBeDefined();
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expect(result.added).toHaveLength(0);
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expect(result.removed).toHaveLength(1);
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expect(result.removed).toEqual([3]);
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});
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it('should see added and removed in the same set', () => {
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const a = [1, 2, 3];
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const b = [1, 2, 4]; // note diff
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const result = iterableDiff(a, b);
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expect(result).toBeDefined();
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expect(result.added).toBeDefined();
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expect(result.removed).toBeDefined();
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expect(result.added).toHaveLength(1);
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expect(result.removed).toHaveLength(1);
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expect(result.added).toEqual([4]);
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expect(result.removed).toEqual([3]);
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});
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});
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});
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