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| 1 | +import EmulatedPerformance from "../src/emulated-performance"; |
| 2 | + |
| 3 | +/** |
| 4 | + * Emulated performance test |
| 5 | + */ |
| 6 | +describe("Emulated performance test", () => { |
| 7 | + let service; |
| 8 | + |
| 9 | + beforeEach(() => { |
| 10 | + window.Date = { |
| 11 | + now: () => { |
| 12 | + return 1000; |
| 13 | + }, |
| 14 | + }; |
| 15 | + window.performance = { |
| 16 | + timing: { |
| 17 | + navigationStart: 0, |
| 18 | + }, |
| 19 | + }; |
| 20 | + service = new EmulatedPerformance(); |
| 21 | + service.config = { |
| 22 | + logPrefix: "", |
| 23 | + }; |
| 24 | + }); |
| 25 | + |
| 26 | + beforeEach(() => { |
| 27 | + spyOn(global.console, "warn").and.callThrough(); |
| 28 | + spyOn(service, "now").and.callThrough(); |
| 29 | + spyOn(service, "mark").and.callThrough(); |
| 30 | + spyOn(service, "measure").and.callThrough(); |
| 31 | + spyOn(service, "firstContentfulPaint").and.callThrough(); |
| 32 | + spyOn(service, "getDurationByMetric").and.callThrough(); |
| 33 | + spyOn(service, "getFirstPaint").and.callThrough(); |
| 34 | + }); |
| 35 | + |
| 36 | + describe("when calls now()", () => { |
| 37 | + it("should return Date.now() / 1000", () => { |
| 38 | + expect(service.now()).toEqual(1); |
| 39 | + }); |
| 40 | + }); |
| 41 | + |
| 42 | + describe("when calls mark()", () => { |
| 43 | + it("should call global.console.warn with the correct arguments", () => { |
| 44 | + service.mark("fibonacci"); |
| 45 | + const text = "Timeline won't be marked for \"fibonacci\"."; |
| 46 | + expect(global.console.warn.calls.count()).toEqual(1); |
| 47 | + expect(global.console.warn).toHaveBeenCalledWith(service.config.logPrefix, text); |
| 48 | + }); |
| 49 | + }); |
| 50 | + |
| 51 | + describe("when calls measure()", () => { |
| 52 | + it("should call getDurationByMetric() with the correct arguments", () => { |
| 53 | + const metrics = { |
| 54 | + age: { |
| 55 | + end: 2018, |
| 56 | + start: 1987, |
| 57 | + }, |
| 58 | + }; |
| 59 | + service.measure("age", metrics); |
| 60 | + expect(service.getDurationByMetric.calls.count()).toEqual(1); |
| 61 | + expect(service.getDurationByMetric).toHaveBeenCalledWith("age", metrics); |
| 62 | + }); |
| 63 | + }); |
| 64 | + |
| 65 | + describe("when calls firstContentfulPaint()", () => { |
| 66 | + beforeEach(() => { |
| 67 | + jest.useFakeTimers(); |
| 68 | + }); |
| 69 | + |
| 70 | + it("should call getFirstPaint() after the setTimeout", () => { |
| 71 | + service.firstContentfulPaint(() => { |
| 72 | + return 1; |
| 73 | + }); |
| 74 | + jest.runAllTimers(); |
| 75 | + expect(service.getFirstPaint.calls.count()).toEqual(1); |
| 76 | + }); |
| 77 | + }); |
| 78 | + |
| 79 | + describe("when calls getDurationByMetric()", () => { |
| 80 | + it("should return the duration", () => { |
| 81 | + const metrics = { |
| 82 | + age: { |
| 83 | + end: 2018, |
| 84 | + start: 1987, |
| 85 | + }, |
| 86 | + }; |
| 87 | + const duration = service.getDurationByMetric("age", metrics); |
| 88 | + expect(duration).toEqual(31); |
| 89 | + }); |
| 90 | + |
| 91 | + it("should return the -1 when duration is 0", () => { |
| 92 | + const metrics = { |
| 93 | + age: { |
| 94 | + end: 2018, |
| 95 | + start: 2018, |
| 96 | + }, |
| 97 | + }; |
| 98 | + const duration = service.getDurationByMetric("age", metrics); |
| 99 | + expect(duration).toEqual(-1); |
| 100 | + }); |
| 101 | + }); |
| 102 | + |
| 103 | + describe("when calls getFirstPaint()", () => { |
| 104 | + it("should return 0 if PerformanceTiming.navigationStar is 0", () => { |
| 105 | + const performance = service.getFirstPaint(); |
| 106 | + expect(performance).toEqual({ |
| 107 | + duration: 0, |
| 108 | + entryType: "paint", |
| 109 | + name: "first-contentful-paint", |
| 110 | + startTime: 0, |
| 111 | + }); |
| 112 | + }); |
| 113 | + |
| 114 | + it("should return performancePaintTiming", () => { |
| 115 | + window.performance.timing.navigationStart = 240; |
| 116 | + const performance = service.getFirstPaint(); |
| 117 | + expect(performance).toEqual({ |
| 118 | + duration: 0, |
| 119 | + entryType: "paint", |
| 120 | + name: "first-contentful-paint", |
| 121 | + startTime: 760, |
| 122 | + }); |
| 123 | + }); |
| 124 | + }); |
| 125 | +}); |
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