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1 | const { expect } = require('expect') |
2 | const { Queue } = require('../lib/queue') | |
3 | ||
4 | describe('Queue test suite', () => { | |
5 | it('Verify enqueue() behavior', () => { | |
6 | const queue = new Queue() | |
7 | let rtSize = queue.enqueue(1) | |
8 | expect(queue.size).toBe(1) | |
9 | expect(rtSize).toBe(queue.size) | |
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10 | expect(queue.offset).toBe(0) |
11 | expect(queue.maxSize).toBe(1) | |
12 | expect(queue.items).toStrictEqual([1]) | |
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13 | rtSize = queue.enqueue(2) |
14 | expect(queue.size).toBe(2) | |
15 | expect(rtSize).toBe(queue.size) | |
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16 | expect(queue.offset).toBe(0) |
17 | expect(queue.maxSize).toBe(2) | |
18 | expect(queue.items).toStrictEqual([1, 2]) | |
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19 | rtSize = queue.enqueue(3) |
20 | expect(queue.size).toBe(3) | |
21 | expect(rtSize).toBe(queue.size) | |
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22 | expect(queue.offset).toBe(0) |
23 | expect(queue.maxSize).toBe(3) | |
24 | expect(queue.items).toStrictEqual([1, 2, 3]) | |
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25 | }) |
26 | ||
27 | it('Verify dequeue() behavior', () => { | |
28 | const queue = new Queue() | |
29 | queue.enqueue(1) | |
30 | queue.enqueue(2) | |
31 | queue.enqueue(3) | |
32 | let rtItem = queue.dequeue() | |
33 | expect(queue.size).toBe(2) | |
34 | expect(rtItem).toBe(1) | |
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35 | expect(queue.offset).toBe(1) |
36 | expect(queue.maxSize).toBe(3) | |
37 | expect(queue.items).toStrictEqual([1, 2, 3]) | |
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38 | rtItem = queue.dequeue() |
39 | expect(queue.size).toBe(1) | |
40 | expect(rtItem).toBe(2) | |
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41 | expect(queue.offset).toBe(0) |
42 | expect(queue.maxSize).toBe(3) | |
43 | expect(queue.items).toStrictEqual([3]) | |
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44 | rtItem = queue.dequeue() |
45 | expect(queue.size).toBe(0) | |
46 | expect(rtItem).toBe(3) | |
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47 | expect(queue.offset).toBe(0) |
48 | expect(queue.maxSize).toBe(3) | |
49 | expect(queue.items).toStrictEqual([]) | |
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50 | }) |
51 | }) |