| 1 | import { expect } from 'expect' |
| 2 | import { |
| 3 | CircularArray, |
| 4 | DEFAULT_CIRCULAR_ARRAY_SIZE |
| 5 | } from '../lib/circular-array.js' |
| 6 | |
| 7 | describe('Circular array test suite', () => { |
| 8 | it('Verify that circular array can be instantiated', () => { |
| 9 | const circularArray = new CircularArray() |
| 10 | expect(circularArray).toBeInstanceOf(CircularArray) |
| 11 | }) |
| 12 | |
| 13 | it('Verify circular array default size at instance creation', () => { |
| 14 | const circularArray = new CircularArray() |
| 15 | expect(circularArray.size).toBe(DEFAULT_CIRCULAR_ARRAY_SIZE) |
| 16 | }) |
| 17 | |
| 18 | it('Verify that circular array size can be set at instance creation', () => { |
| 19 | const circularArray = new CircularArray(1000) |
| 20 | expect(circularArray.size).toBe(1000) |
| 21 | }) |
| 22 | |
| 23 | it('Verify that circular array size and items can be set at instance creation', () => { |
| 24 | let circularArray = new CircularArray(1000, 1, 2, 3, 4, 5) |
| 25 | expect(circularArray.size).toBe(1000) |
| 26 | expect(circularArray.length).toBe(5) |
| 27 | circularArray = new CircularArray(4, 1, 2, 3, 4, 5) |
| 28 | expect(circularArray.size).toBe(4) |
| 29 | expect(circularArray.length).toBe(4) |
| 30 | }) |
| 31 | |
| 32 | it('Verify that circular array size is valid at instance creation', () => { |
| 33 | expect(() => new CircularArray(0.25)).toThrow( |
| 34 | new TypeError('Invalid circular array size: 0.25 is not a safe integer') |
| 35 | ) |
| 36 | expect(() => new CircularArray(-1)).toThrow( |
| 37 | new RangeError('Invalid circular array size: -1 < 0') |
| 38 | ) |
| 39 | expect(() => new CircularArray(Number.MAX_SAFE_INTEGER + 1)).toThrow( |
| 40 | new TypeError( |
| 41 | `Invalid circular array size: ${ |
| 42 | Number.MAX_SAFE_INTEGER + 1 |
| 43 | } is not a safe integer` |
| 44 | ) |
| 45 | ) |
| 46 | }) |
| 47 | |
| 48 | it('Verify that circular array empty works as intended', () => { |
| 49 | const circularArray = new CircularArray() |
| 50 | expect(circularArray.empty()).toBe(true) |
| 51 | }) |
| 52 | |
| 53 | it('Verify that circular array full works as intended', () => { |
| 54 | const circularArray = new CircularArray(5, 1, 2, 3, 4, 5) |
| 55 | expect(circularArray.full()).toBe(true) |
| 56 | }) |
| 57 | |
| 58 | it('Verify that circular array push works as intended', () => { |
| 59 | let circularArray = new CircularArray(4) |
| 60 | let arrayLength = circularArray.push(1, 2, 3, 4, 5) |
| 61 | expect(arrayLength).toBe(circularArray.size) |
| 62 | expect(circularArray.length).toBe(circularArray.size) |
| 63 | expect(circularArray).toStrictEqual(new CircularArray(4, 2, 3, 4, 5)) |
| 64 | arrayLength = circularArray.push(6, 7) |
| 65 | expect(arrayLength).toBe(circularArray.size) |
| 66 | expect(circularArray.length).toBe(circularArray.size) |
| 67 | expect(circularArray).toStrictEqual(new CircularArray(4, 4, 5, 6, 7)) |
| 68 | circularArray = new CircularArray(100) |
| 69 | arrayLength = circularArray.push(1, 2, 3, 4, 5) |
| 70 | expect(arrayLength).toBe(5) |
| 71 | expect(circularArray.size).toBe(100) |
| 72 | expect(circularArray.length).toBe(5) |
| 73 | expect(circularArray).toStrictEqual(new CircularArray(100, 1, 2, 3, 4, 5)) |
| 74 | }) |
| 75 | |
| 76 | it('Verify that circular array splice works as intended', () => { |
| 77 | let circularArray = new CircularArray(1000, 1, 2, 3, 4, 5) |
| 78 | let deletedItems = circularArray.splice(2) |
| 79 | expect(deletedItems).toStrictEqual(new CircularArray(3, 3, 4, 5)) |
| 80 | expect(circularArray.length).toBe(2) |
| 81 | expect(circularArray).toStrictEqual(new CircularArray(1000, 1, 2)) |
| 82 | circularArray = new CircularArray(1000, 1, 2, 3, 4, 5) |
| 83 | deletedItems = circularArray.splice(2, 1) |
| 84 | expect(deletedItems).toStrictEqual(new CircularArray(1, 3)) |
| 85 | expect(circularArray.length).toBe(4) |
| 86 | expect(circularArray).toStrictEqual(new CircularArray(1000, 1, 2, 4, 5)) |
| 87 | circularArray = new CircularArray(4, 1, 2, 3, 4) |
| 88 | deletedItems = circularArray.splice(2, 1, 5, 6) |
| 89 | expect(deletedItems).toStrictEqual(new CircularArray(2, 3, 1)) |
| 90 | expect(circularArray.length).toBe(4) |
| 91 | expect(circularArray).toStrictEqual(new CircularArray(4, 2, 5, 6, 4)) |
| 92 | }) |
| 93 | |
| 94 | it('Verify that circular array concat works as intended', () => { |
| 95 | let circularArray = new CircularArray(5, 1, 2, 3, 4, 5) |
| 96 | circularArray = circularArray.concat(6, 7) |
| 97 | expect(circularArray.length).toBe(5) |
| 98 | expect(circularArray).toStrictEqual(new CircularArray(5, 3, 4, 5, 6, 7)) |
| 99 | circularArray = new CircularArray(1) |
| 100 | circularArray = circularArray.concat(6, 7) |
| 101 | expect(circularArray.length).toBe(1) |
| 102 | expect(circularArray).toStrictEqual(new CircularArray(1, 7)) |
| 103 | }) |
| 104 | |
| 105 | it('Verify that circular array unshift works as intended', () => { |
| 106 | let circularArray = new CircularArray(5, 1, 2, 3, 4, 5) |
| 107 | let arrayLength = circularArray.unshift(6, 7) |
| 108 | expect(arrayLength).toBe(5) |
| 109 | expect(circularArray.length).toBe(5) |
| 110 | expect(circularArray).toStrictEqual(new CircularArray(5, 6, 7, 1, 2, 3)) |
| 111 | circularArray = new CircularArray(1) |
| 112 | arrayLength = circularArray.unshift(6, 7) |
| 113 | expect(arrayLength).toBe(1) |
| 114 | expect(circularArray.length).toBe(1) |
| 115 | expect(circularArray).toStrictEqual(new CircularArray(1, 6)) |
| 116 | }) |
| 117 | |
| 118 | it('Verify that circular array resize works as intended', () => { |
| 119 | expect(() => new CircularArray().resize(0.25)).toThrow( |
| 120 | new TypeError('Invalid circular array size: 0.25 is not a safe integer') |
| 121 | ) |
| 122 | expect(() => new CircularArray().resize(-1)).toThrow( |
| 123 | new RangeError('Invalid circular array size: -1 < 0') |
| 124 | ) |
| 125 | expect(() => |
| 126 | new CircularArray().resize(Number.MAX_SAFE_INTEGER + 1) |
| 127 | ).toThrow( |
| 128 | new TypeError( |
| 129 | `Invalid circular array size: ${ |
| 130 | Number.MAX_SAFE_INTEGER + 1 |
| 131 | } is not a safe integer` |
| 132 | ) |
| 133 | ) |
| 134 | let circularArray = new CircularArray(5, 1, 2, 3, 4, 5) |
| 135 | circularArray.resize(0) |
| 136 | expect(circularArray.size).toBe(0) |
| 137 | expect(circularArray).toStrictEqual(new CircularArray(0)) |
| 138 | circularArray = new CircularArray(5, 1, 2, 3, 4, 5) |
| 139 | circularArray.resize(1) |
| 140 | expect(circularArray.size).toBe(1) |
| 141 | expect(circularArray).toStrictEqual(new CircularArray(1, 1)) |
| 142 | circularArray = new CircularArray(5, 1, 2, 3, 4, 5) |
| 143 | circularArray.resize(3) |
| 144 | expect(circularArray.size).toBe(3) |
| 145 | expect(circularArray).toStrictEqual(new CircularArray(3, 1, 2, 3)) |
| 146 | circularArray = new CircularArray(5, 1, 2, 3, 4, 5) |
| 147 | circularArray.resize(8) |
| 148 | expect(circularArray.size).toBe(8) |
| 149 | expect(circularArray).toStrictEqual(new CircularArray(8, 1, 2, 3, 4, 5)) |
| 150 | }) |
| 151 | }) |