120 lines
3.5 KiB
JavaScript
120 lines
3.5 KiB
JavaScript
import {
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insertAtIndex,
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moveToIndex,
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pushToArray,
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removeAtIndex,
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replaceAtIndex,
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swapElements,
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} from '@/graphql/immutable-operations.ts';
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describe('Cache operations', () => {
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it('removes at index', () => {
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const original = [1, 2, 3];
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const copy = removeAtIndex(original, 1);
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expect(original.length).toBe(3);
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expect(original).toEqual([1, 2, 3]);
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expect(copy.length).toBe(2);
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expect(copy).toEqual([1, 3]);
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original.push(4);
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expect(original.length).toBe(4);
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expect(original).toEqual([1, 2, 3, 4]);
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expect(copy.length).toBe(2);
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expect(copy).toEqual([1, 3]);
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});
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it('replaces at index', () => {
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const original = [1, 2, 3];
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const copy = replaceAtIndex(original, 1, 234);
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expect(original.length).toBe(3);
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expect(original).toEqual([1, 2, 3]);
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expect(copy.length).toBe(3);
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expect(copy).toEqual([1, 234, 3]);
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original.push(4);
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expect(original.length).toBe(4);
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expect(original).toEqual([1, 2, 3, 4]);
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expect(copy.length).toBe(3);
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expect(copy).toEqual([1, 234, 3]);
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});
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it('inserts at index', () => {
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const original = [1, 2, 3];
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const copy = insertAtIndex(original, 1, 234);
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expect(original.length).toBe(3);
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expect(original).toEqual([1, 2, 3]);
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expect(copy.length).toBe(4);
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expect(copy).toEqual([1, 234, 2, 3]);
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original.push(4);
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expect(original.length).toBe(4);
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expect(original).toEqual([1, 2, 3, 4]);
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expect(copy.length).toBe(4);
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expect(copy).toEqual([1, 234, 2, 3]);
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});
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it('pushed to array', () => {
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const original = [1, 2, 3];
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const copy = pushToArray(original, 5);
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expect(original.length).toBe(3);
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expect(original).toEqual([1, 2, 3]);
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expect(copy.length).toBe(4);
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expect(copy).toEqual([1, 2, 3, 5]);
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original.push(4);
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expect(original.length).toBe(4);
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expect(original).toEqual([1, 2, 3, 4]);
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expect(copy.length).toBe(4);
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expect(copy).toEqual([1, 2, 3, 5]);
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});
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it('swaps elements of array', () => {
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const original = [1, 2, 3];
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const copy = swapElements(original, 0, 2);
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expect(original.length).toBe(3);
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expect(original).toEqual([1, 2, 3]);
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expect(copy.length).toBe(3);
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expect(copy).toEqual([3, 2, 1]);
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original.push(4);
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expect(original.length).toBe(4);
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expect(original).toEqual([1, 2, 3, 4]);
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expect(copy.length).toBe(3);
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expect(copy).toEqual([3, 2, 1]);
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});
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it('swaps neighbors', () => {
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const original = [1, 2, 3, 4, 5];
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const copy = swapElements(original, 3, 2);
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expect(copy).toEqual([1, 2, 4, 3, 5]);
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});
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it('does nothing with wrong indices', () => {
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const original = [1, 2, 3, 4, 5];
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const copy1 = swapElements(original, -1, 2);
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const copy2 = swapElements(original, 1, 99);
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const copy3 = swapElements(original, 1, 5);
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expect(copy1).toEqual([1, 2, 3, 4, 5]);
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expect(copy2).toEqual([1, 2, 3, 4, 5]);
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expect(copy3).toEqual([1, 2, 3, 4, 5]);
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original.push(4);
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expect(original.length).toBe(6);
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expect(copy1.length).toBe(5);
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expect(copy2.length).toBe(5);
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expect(copy3.length).toBe(5);
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});
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it('moves to a specific index', () => {
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const original = [1, 2, 3, 4, 5, 6, 7];
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const toStart = moveToIndex(original, 3, 0);
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const toEnd = moveToIndex(original, 3, original.length - 1);
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const toMiddle = moveToIndex(original, 3, 2);
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expect(toStart).toEqual([4, 1, 2, 3, 5, 6, 7]);
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expect(toEnd).toEqual([1, 2, 3, 5, 6, 7, 4]);
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expect(toMiddle).toEqual([1, 2, 4, 3, 5, 6, 7]);
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});
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});
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