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4082efc1 JB |
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(); | |
6c23cbbb | 12 | expect(circularArray.size).toBe(Number.MAX_SAFE_INTEGER); |
4082efc1 JB |
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( | |
31 | new RangeError('Invalid circular array size') | |
32 | ); | |
33 | }); | |
34 | ||
35 | it('Verify that circular array empty works as intended', () => { | |
36 | const circularArray = new CircularArray(); | |
37 | expect(circularArray.empty()).toBe(true); | |
38 | }); | |
39 | ||
40 | it('Verify that circular array full works as intended', () => { | |
41 | const circularArray = new CircularArray(5, 1, 2, 3, 4, 5); | |
42 | expect(circularArray.full()).toBe(true); | |
43 | }); | |
44 | ||
45 | it('Verify that circular array push works as intended', () => { | |
46 | let circularArray = new CircularArray(4); | |
47 | let arrayLength = circularArray.push(1, 2, 3, 4, 5); | |
48 | expect(arrayLength).toBe(circularArray.size); | |
49 | expect(circularArray.length).toBe(circularArray.size); | |
50 | expect(circularArray).toStrictEqual(new CircularArray(4, 2, 3, 4, 5)); | |
51 | arrayLength = circularArray.push(6, 7); | |
52 | expect(arrayLength).toBe(circularArray.size); | |
53 | expect(circularArray.length).toBe(circularArray.size); | |
54 | expect(circularArray).toStrictEqual(new CircularArray(4, 4, 5, 6, 7)); | |
55 | circularArray = new CircularArray(100); | |
56 | arrayLength = circularArray.push(1, 2, 3, 4, 5); | |
57 | expect(arrayLength).toBe(5); | |
58 | expect(circularArray.size).toBe(100); | |
59 | expect(circularArray.length).toBe(5); | |
60 | expect(circularArray).toStrictEqual(new CircularArray(100, 1, 2, 3, 4, 5)); | |
61 | }); | |
62 | ||
63 | it('Verify that circular array splice works as intended', () => { | |
64 | let circularArray = new CircularArray(1000, 1, 2, 3, 4, 5); | |
65 | let deletedItems = circularArray.splice(2); | |
66 | expect(deletedItems).toStrictEqual(new CircularArray(3, 3, 4, 5)); | |
67 | expect(circularArray.length).toBe(2); | |
68 | expect(circularArray).toStrictEqual(new CircularArray(1000, 1, 2)); | |
69 | circularArray = new CircularArray(1000, 1, 2, 3, 4, 5); | |
70 | deletedItems = circularArray.splice(2, 1); | |
71 | expect(deletedItems).toStrictEqual(new CircularArray(1, 3)); | |
72 | expect(circularArray.length).toBe(4); | |
73 | expect(circularArray).toStrictEqual(new CircularArray(1000, 1, 2, 4, 5)); | |
74 | circularArray = new CircularArray(4, 1, 2, 3, 4); | |
75 | deletedItems = circularArray.splice(2, 1, 5, 6); | |
76 | expect(deletedItems).toStrictEqual(new CircularArray(1, 3)); | |
77 | expect(circularArray.length).toBe(4); | |
78 | expect(circularArray).toStrictEqual(new CircularArray(4, 2, 4, 5, 6)); | |
79 | }); | |
80 | ||
81 | it('Verify that circular array concat works as intended', () => { | |
82 | let circularArray = new CircularArray(5, 1, 2, 3, 4, 5); | |
83 | circularArray = circularArray.concat(6, 7); | |
84 | expect(circularArray.length).toBe(5); | |
85 | expect(circularArray).toStrictEqual(new CircularArray(5, 3, 4, 5, 6, 7)); | |
86 | circularArray = new CircularArray(1); | |
87 | circularArray = circularArray.concat(6, 7); | |
88 | expect(circularArray.length).toBe(1); | |
89 | expect(circularArray).toStrictEqual(new CircularArray(1, 7)); | |
90 | }); | |
91 | ||
92 | it('Verify that circular array unshift works as intended', () => { | |
93 | let circularArray = new CircularArray(5, 1, 2, 3, 4, 5); | |
94 | let arrayLength = circularArray.unshift(6, 7); | |
95 | expect(arrayLength).toBe(5); | |
96 | expect(circularArray.length).toBe(5); | |
97 | expect(circularArray).toStrictEqual(new CircularArray(5, 6, 7, 1, 2, 3)); | |
98 | circularArray = new CircularArray(1); | |
99 | arrayLength = circularArray.unshift(6, 7); | |
100 | expect(arrayLength).toBe(1); | |
101 | expect(circularArray.length).toBe(1); | |
102 | expect(circularArray).toStrictEqual(new CircularArray(1, 6)); | |
103 | }); | |
104 | ||
105 | it('Verify that circular array resize works as intended', () => { | |
106 | expect(() => new CircularArray().resize(-1)).toThrowError( | |
107 | new RangeError('Invalid circular array size') | |
108 | ); | |
109 | let circularArray = new CircularArray(5, 1, 2, 3, 4, 5); | |
110 | circularArray.resize(0); | |
111 | expect(circularArray.size).toBe(0); | |
112 | expect(circularArray).toStrictEqual(new CircularArray(0)); | |
113 | circularArray = new CircularArray(5, 1, 2, 3, 4, 5); | |
114 | circularArray.resize(3); | |
115 | expect(circularArray.size).toBe(3); | |
116 | expect(circularArray).toStrictEqual(new CircularArray(3, 1, 2, 3)); | |
117 | circularArray = new CircularArray(5, 1, 2, 3, 4, 5); | |
118 | circularArray.resize(8); | |
119 | expect(circularArray.size).toBe(8); | |
120 | expect(circularArray).toStrictEqual(new CircularArray(8, 1, 2, 3, 4, 5)); | |
121 | }); | |
122 | }); |