From e47609d7465a8ef8ce63aac584946666ff9e2513 Mon Sep 17 00:00:00 2001
From: LeoSL <leosilvalima@gmail.com>
Date: Thu, 3 Oct 2019 21:38:04 -0400
Subject: [PATCH 1/2] Add unit tests to Max Product of 3 numbers problem
---
 .../max-product-of-3-numbers/index.js &#124; 2 ++
 .../max-product-of-3-numbers.test.js &#124; 33 +++++++++++++++++++
 2 files changed, 35 insertions(+)
 create mode 100644 src/_Problems_/max-product-of-3-numbers/max-product-of-3-numbers.test.js
diff --git a/src/_Problems_/max-product-of-3-numbers/index.js b/src/_Problems_/max-product-of-3-numbers/index.js
index 5c3febc8..f5f1f70c 100644
--- a/src/_Problems_/max-product-of-3-numbers/index.js
+++ b/src/_Problems_/max-product-of-3-numbers/index.js
@@ -63,3 +63,5 @@ function maxProductof3NumbersII(arr) {
 
 return p1> p2 ? p1 : p2;
 }
+
+module.exports = { maxProductof3Numbers, maxProductof3NumbersII };
diff --git a/src/_Problems_/max-product-of-3-numbers/max-product-of-3-numbers.test.js b/src/_Problems_/max-product-of-3-numbers/max-product-of-3-numbers.test.js
new file mode 100644
index 00000000..4832e0e5
--- /dev/null
+++ b/src/_Problems_/max-product-of-3-numbers/max-product-of-3-numbers.test.js
@@ -0,0 +1,33 @@
+const { maxProductof3Numbers, maxProductof3NumbersII } = require(".");
+
+describe("Maximum Product of three numbers", () => {
+ it("throws an error with no Array is passed", () => {
+ expect(() => {
+ maxProductof3Numbers("xunda");
+ }).toThrowError();
+ expect(() => {
+ maxProductof3NumbersII("xunda");
+ }).toThrowError();
+ });
+
+ it("returns the product of an array with 3 numbers", () => {
+ expect(maxProductof3Numbers([1, 2, 3])).toEqual(6);
+ expect(maxProductof3NumbersII([1, 2, 3])).toEqual(6);
+ });
+
+ it("returns the product of an array with positive and negative numbers", () => {
+ expect(maxProductof3Numbers([-10, -10, 2, 3])).toEqual(300);
+ expect(maxProductof3NumbersII([-10, -10, 2, 3])).toEqual(300);
+ });
+
+ it("returns the product of an array with negative numbers", () => {
+ expect(maxProductof3Numbers([-10, -1, -2, -10])).toEqual(-20);
+ expect(maxProductof3NumbersII([-10, -1, -2, -10])).toEqual(-20);
+ });
+
+ it("returns the proper calculation if the array is large", () => {
+ 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];
+ expect(maxProductof3Numbers(largeArray)).toEqual(100 * 100 * 100);
+ expect(maxProductof3NumbersII(largeArray)).toEqual(100 * 100 * 100);
+ });
+});
From 5dca0897cda59a2fc1ddeee423e889d5cb424fbf Mon Sep 17 00:00:00 2001
From: LeoSL <leosilvalima@gmail.com>
Date: Fri, 4 Oct 2019 14:48:12 -0400
Subject: [PATCH 2/2] Add test case when the array length is less than 3
---
 .../max-product-of-3-numbers.test.js &#124; 6 ++++++
 1 file changed, 6 insertions(+)
diff --git a/src/_Problems_/max-product-of-3-numbers/max-product-of-3-numbers.test.js b/src/_Problems_/max-product-of-3-numbers/max-product-of-3-numbers.test.js
index 4832e0e5..fd29122e 100644
--- a/src/_Problems_/max-product-of-3-numbers/max-product-of-3-numbers.test.js
+++ b/src/_Problems_/max-product-of-3-numbers/max-product-of-3-numbers.test.js
@@ -30,4 +30,10 @@ describe("Maximum Product of three numbers", () => {
 expect(maxProductof3Numbers(largeArray)).toEqual(100 * 100 * 100);
 expect(maxProductof3NumbersII(largeArray)).toEqual(100 * 100 * 100);
 });
+
+ it("returns an error if there are less than 3 numbers", () => {
+ expect(() => {
+ maxProductof3Numbers([-10, -1]);
+ }).toThrowError();
+ });
 });
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