| 1 | import { CircularArray } from '../../src/utils/CircularArray'; |
| 2 | import expect from 'expect'; |
| 3 | |
| 4 | describe('Circular array test suite', () => { |
| 5 | it('Verify that circular array can be instantiated', () => { |
| 6 | const circularArray = new CircularArray(); |
| 7 | expect(circularArray).toBeInstanceOf(CircularArray); |
| 8 | }); |
| 9 | |
| 10 | it('Verify circular array default size at instance creation', () => { |
| 11 | const circularArray = new CircularArray(); |
| 12 | expect(circularArray.size).toBe(Number.MAX_SAFE_INTEGER); |
| 13 | }); |
| 14 | |
| 15 | it('Verify that circular array size can be set at instance creation', () => { |
| 16 | const circularArray = new CircularArray(1000); |
| 17 | expect(circularArray.size).toBe(1000); |
| 18 | }); |
| 19 | |
| 20 | it('Verify that circular array size and items can be set at instance creation', () => { |
| 21 | let circularArray = new CircularArray(1000, 1, 2, 3, 4, 5); |
| 22 | expect(circularArray.size).toBe(1000); |
| 23 | expect(circularArray.length).toBe(5); |
| 24 | circularArray = new CircularArray(4, 1, 2, 3, 4, 5); |
| 25 | expect(circularArray.size).toBe(4); |
| 26 | expect(circularArray.length).toBe(4); |
| 27 | }); |
| 28 | |
| 29 | it("Verify that circular array size can't be negative at instance creation", () => { |
| 30 | expect(() => new CircularArray(-1)).toThrowError(new RangeError('Invalid circular array size')); |
| 31 | }); |
| 32 | |
| 33 | it('Verify that circular array empty works as intended', () => { |
| 34 | const circularArray = new CircularArray(); |
| 35 | expect(circularArray.empty()).toBe(true); |
| 36 | }); |
| 37 | |
| 38 | it('Verify that circular array full works as intended', () => { |
| 39 | const circularArray = new CircularArray(5, 1, 2, 3, 4, 5); |
| 40 | expect(circularArray.full()).toBe(true); |
| 41 | }); |
| 42 | |
| 43 | it('Verify that circular array push works as intended', () => { |
| 44 | let circularArray = new CircularArray(4); |
| 45 | let arrayLength = circularArray.push(1, 2, 3, 4, 5); |
| 46 | expect(arrayLength).toBe(circularArray.size); |
| 47 | expect(circularArray.length).toBe(circularArray.size); |
| 48 | expect(circularArray).toStrictEqual(new CircularArray(4, 2, 3, 4, 5)); |
| 49 | arrayLength = circularArray.push(6, 7); |
| 50 | expect(arrayLength).toBe(circularArray.size); |
| 51 | expect(circularArray.length).toBe(circularArray.size); |
| 52 | expect(circularArray).toStrictEqual(new CircularArray(4, 4, 5, 6, 7)); |
| 53 | circularArray = new CircularArray(100); |
| 54 | arrayLength = circularArray.push(1, 2, 3, 4, 5); |
| 55 | expect(arrayLength).toBe(5); |
| 56 | expect(circularArray.size).toBe(100); |
| 57 | expect(circularArray.length).toBe(5); |
| 58 | expect(circularArray).toStrictEqual(new CircularArray(100, 1, 2, 3, 4, 5)); |
| 59 | }); |
| 60 | |
| 61 | it('Verify that circular array splice works as intended', () => { |
| 62 | let circularArray = new CircularArray(1000, 1, 2, 3, 4, 5); |
| 63 | let deletedItems = circularArray.splice(2); |
| 64 | expect(deletedItems).toStrictEqual(new CircularArray(3, 3, 4, 5)); |
| 65 | expect(circularArray.length).toBe(2); |
| 66 | expect(circularArray).toStrictEqual(new CircularArray(1000, 1, 2)); |
| 67 | circularArray = new CircularArray(1000, 1, 2, 3, 4, 5); |
| 68 | deletedItems = circularArray.splice(2, 1); |
| 69 | expect(deletedItems).toStrictEqual(new CircularArray(1, 3)); |
| 70 | expect(circularArray.length).toBe(4); |
| 71 | expect(circularArray).toStrictEqual(new CircularArray(1000, 1, 2, 4, 5)); |
| 72 | circularArray = new CircularArray(4, 1, 2, 3, 4); |
| 73 | deletedItems = circularArray.splice(2, 1, 5, 6); |
| 74 | expect(deletedItems).toStrictEqual(new CircularArray(1, 3)); |
| 75 | expect(circularArray.length).toBe(4); |
| 76 | expect(circularArray).toStrictEqual(new CircularArray(4, 2, 4, 5, 6)); |
| 77 | }); |
| 78 | |
| 79 | it('Verify that circular array concat works as intended', () => { |
| 80 | let circularArray = new CircularArray(5, 1, 2, 3, 4, 5); |
| 81 | circularArray = circularArray.concat(6, 7); |
| 82 | expect(circularArray.length).toBe(5); |
| 83 | expect(circularArray).toStrictEqual(new CircularArray(5, 3, 4, 5, 6, 7)); |
| 84 | circularArray = new CircularArray(1); |
| 85 | circularArray = circularArray.concat(6, 7); |
| 86 | expect(circularArray.length).toBe(1); |
| 87 | expect(circularArray).toStrictEqual(new CircularArray(1, 7)); |
| 88 | }); |
| 89 | |
| 90 | it('Verify that circular array unshift works as intended', () => { |
| 91 | let circularArray = new CircularArray(5, 1, 2, 3, 4, 5); |
| 92 | let arrayLength = circularArray.unshift(6, 7); |
| 93 | expect(arrayLength).toBe(5); |
| 94 | expect(circularArray.length).toBe(5); |
| 95 | expect(circularArray).toStrictEqual(new CircularArray(5, 6, 7, 1, 2, 3)); |
| 96 | circularArray = new CircularArray(1); |
| 97 | arrayLength = circularArray.unshift(6, 7); |
| 98 | expect(arrayLength).toBe(1); |
| 99 | expect(circularArray.length).toBe(1); |
| 100 | expect(circularArray).toStrictEqual(new CircularArray(1, 6)); |
| 101 | }); |
| 102 | |
| 103 | it('Verify that circular array resize works as intended', () => { |
| 104 | expect(() => new CircularArray().resize(-1)).toThrowError( |
| 105 | new RangeError('Invalid circular array size') |
| 106 | ); |
| 107 | let circularArray = new CircularArray(5, 1, 2, 3, 4, 5); |
| 108 | circularArray.resize(0); |
| 109 | expect(circularArray.size).toBe(0); |
| 110 | expect(circularArray).toStrictEqual(new CircularArray(0)); |
| 111 | circularArray = new CircularArray(5, 1, 2, 3, 4, 5); |
| 112 | circularArray.resize(3); |
| 113 | expect(circularArray.size).toBe(3); |
| 114 | expect(circularArray).toStrictEqual(new CircularArray(3, 1, 2, 3)); |
| 115 | circularArray = new CircularArray(5, 1, 2, 3, 4, 5); |
| 116 | circularArray.resize(8); |
| 117 | expect(circularArray.size).toBe(8); |
| 118 | expect(circularArray).toStrictEqual(new CircularArray(8, 1, 2, 3, 4, 5)); |
| 119 | }); |
| 120 | }); |