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Commit c78f6ed

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Merge pull request knaxus#26 from LeoSL/add-test-to-max-product-of-3-numbers
Add unit tests to Max Product of 3 numbers problem
2 parents 84061cf + 5dca089 commit c78f6ed

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‎src/_Problems_/max-product-of-3-numbers/index.js‎

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@@ -63,3 +63,5 @@ function maxProductof3NumbersII(arr) {
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return p1 > p2 ? p1 : p2;
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}
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module.exports = { maxProductof3Numbers, maxProductof3NumbersII };
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const { maxProductof3Numbers, maxProductof3NumbersII } = require(".");
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describe("Maximum Product of three numbers", () => {
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it("throws an error with no Array is passed", () => {
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expect(() => {
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maxProductof3Numbers("xunda");
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}).toThrowError();
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expect(() => {
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maxProductof3NumbersII("xunda");
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}).toThrowError();
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});
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it("returns the product of an array with 3 numbers", () => {
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expect(maxProductof3Numbers([1, 2, 3])).toEqual(6);
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expect(maxProductof3NumbersII([1, 2, 3])).toEqual(6);
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});
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it("returns the product of an array with positive and negative numbers", () => {
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expect(maxProductof3Numbers([-10, -10, 2, 3])).toEqual(300);
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expect(maxProductof3NumbersII([-10, -10, 2, 3])).toEqual(300);
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});
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it("returns the product of an array with negative numbers", () => {
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expect(maxProductof3Numbers([-10, -1, -2, -10])).toEqual(-20);
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expect(maxProductof3NumbersII([-10, -1, -2, -10])).toEqual(-20);
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});
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it("returns the proper calculation if the array is large", () => {
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const largeArray = [100, 100, 100, 12, 3, 45, 4, 3, 7, 8, 1, 3, 7, 8, 1, 4, 3, 7, 8, 1, 3, 7, 8, 1, 12, 3, 45, 4, 3, 7, 8, 1, 3, 7, 8, 1, 4, 3, 7, 8, 1, 3, 7, 8, 1, 4, 3, 7, 8, 1, 3, 7, 8, 1, 12, 3, 45, 4, 3, 7, 8, 1, 3, 7, 8, 1, 4, 3, 7, 8, 1, 3, 7, 8, 45, 4, 3, 7, 8, 1, 3, 7, 8, 3, 45, 4, 3, 7, 8, 1, 3, 7, 8, 1, 4, 3, 7, 8, 1, 3, 7, 8, 1, 12, 3, 45, 4, 3, 7, 8, 1, 3, 7, 8, 1, 4, 3, 7, 8, 1, 3, 7, 8, 1, 4, 3, 7, 8, 1, 3, 7, 8, 1, 12, 3, 45, 4, 3, 7, 8, 1, 3, 7, 8, 1, 4, 3, 7, 8, 1, 3, 7, 8, 45, 4, 3, 7, 8, 1, 3, 7, 8];
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expect(maxProductof3Numbers(largeArray)).toEqual(100 * 100 * 100);
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expect(maxProductof3NumbersII(largeArray)).toEqual(100 * 100 * 100);
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});
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it("returns an error if there are less than 3 numbers", () => {
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expect(() => {
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maxProductof3Numbers([-10, -1]);
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}).toThrowError();
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});
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});

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