76 lines
3 KiB
JavaScript
76 lines
3 KiB
JavaScript
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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const PackedHistogram_1 = require("./PackedHistogram");
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describe("Packed histogram", () => {
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it("should compute median value in first bucket", () => {
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// given
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const histogram = new PackedHistogram_1.default(1, Number.MAX_SAFE_INTEGER, 3);
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histogram.recordValue(123456);
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histogram.recordValue(127);
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histogram.recordValue(42);
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// when
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const medianValue = histogram.getValueAtPercentile(50);
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// then
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expect(medianValue).toBe(127);
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});
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it("should compute same values when new or reseted", () => {
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// given
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const histogram = new PackedHistogram_1.default(1, 2, 3);
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const histogram2 = new PackedHistogram_1.default(1, 2, 3);
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histogram.autoResize = true;
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histogram2.autoResize = true;
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[1, 49026].forEach((v) => histogram.recordValue(v));
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// when
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histogram.reset();
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[7, 67, 42357, 805017].forEach((v) => {
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histogram.recordValue(v);
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histogram2.recordValue(v);
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});
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// then
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expect(histogram.getValueAtPercentile(5)).toBe(histogram2.getValueAtPercentile(5));
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});
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it("should compute value outside first bucket with an error less than 1000", () => {
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// given
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const histogram = new PackedHistogram_1.default(1, 123456, 2);
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histogram.recordValue(5234);
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histogram.recordValue(127);
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histogram.recordValue(42);
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// when
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const percentileValue = histogram.getValueAtPercentile(90);
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// then
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expect(Math.abs(percentileValue - 5234)).toBeLessThan(100);
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});
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it("should resize underlying packed array when recording an out of bound value", () => {
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// given
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const histogram = new PackedHistogram_1.default(1, 2, 3);
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histogram.autoResize = true;
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// when
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histogram.recordValue(123456);
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// then
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expect(histogram.totalCount).toBe(1);
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});
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});
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describe("Histogram clearing support", () => {
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it("should reset data in order to reuse histogram", () => {
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// given
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const histogram = new PackedHistogram_1.default(1, Number.MAX_SAFE_INTEGER, 2);
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const histogram2 = new PackedHistogram_1.default(1, Number.MAX_SAFE_INTEGER, 2);
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histogram.startTimeStampMsec = 42;
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histogram.endTimeStampMsec = 56;
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histogram.tag = "blabla";
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histogram.recordValue(10);
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histogram.recordValue(1000);
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histogram.recordValue(10000000);
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// when
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histogram.reset();
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// then
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expect(histogram.totalCount).toBe(0);
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expect(histogram.startTimeStampMsec).toBe(0);
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expect(histogram.endTimeStampMsec).toBe(0);
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//expect(histogram.tag).toBe(NO_TAG);
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expect(histogram.maxValue).toBe(0);
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expect(histogram.minNonZeroValue).toBe(Number.MAX_SAFE_INTEGER);
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expect(histogram.getValueAtPercentile(99.999)).toBe(0);
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});
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});
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//# sourceMappingURL=PackedHistogram.spec.js.map
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