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29 lines
953 B
JavaScript
29 lines
953 B
JavaScript
'use strict';
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describe('Chart.helpers.math', function() {
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var math = Chart.helpers.math;
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var factorize = math._factorize;
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it('should factorize', function() {
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expect(factorize(1000)).toEqual([1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500]);
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expect(factorize(60)).toEqual([1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30]);
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expect(factorize(30)).toEqual([1, 2, 3, 5, 6, 10, 15]);
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expect(factorize(24)).toEqual([1, 2, 3, 4, 6, 8, 12]);
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expect(factorize(12)).toEqual([1, 2, 3, 4, 6]);
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expect(factorize(4)).toEqual([1, 2]);
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expect(factorize(-1)).toEqual([]);
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expect(factorize(2.76)).toEqual([]);
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});
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it('should do a log10 operation', function() {
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expect(math.log10(0)).toBe(-Infinity);
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// Check all allowed powers of 10, which should return integer values
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var maxPowerOf10 = Math.floor(math.log10(Number.MAX_VALUE));
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for (var i = 0; i < maxPowerOf10; i += 1) {
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expect(math.log10(Math.pow(10, i))).toBe(i);
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}
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});
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});
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