Adds testing for the get mazePath problem knaxus#48

Author: glennforrest

README.md

@@ -50,7 +50,7 @@ Collection of interview questions with Unit Tests. Problems includes Data Struct
 - [FizzBuzz](src/_Problems_/fizzbuzz)
 - [String Permutaions](src/_Problems_/get-string-permutations)
 - [Get Subsequence](src/_Problems_/get_subsequence)
-- [Get Maze Path](src/_Problems_/get_subsequence)
+- [Get Maze Path](src/_Problems_/get-mazePath)
 - [Get longest consecutive 1s](src/_Problems_/max-consecutive-1s)
 - [Get Max Char](src/_Problems_/maxchar)
 - [Get Smallest Common Number](src/_Problems_/get-smallest-common-number)

src/_Problems_/get-mazePath/get-mazePath.test.js

@@ -0,0 +1,41 @@
+const { getMazePath } = require('.');
+
+describe('Get maze path', () => {
+  it('returns all possible solutions for a 2x2 grid', () => {
+    const expectedSolutions = ['HHVV', 'HVHV', 'HVVH', 'VHHV', 'VHVH', 'VVHH'];
+
+    expect(getMazePath(0, 0, 2, 2)).toEqual(expectedSolutions);
+  });
+
+  it('returns an even amount of horizontal and vertical movements', () => {
+    const solutions = getMazePath(0, 0, 3, 3);
+
+    solutions.forEach(solution => {
+      expect(solution.length).toEqual(6);
+
+      expect(solution.match(/H/g).length).toEqual(3);
+      expect(solution.match(/V/g).length).toEqual(3);
+    });
+  });
+
+  it('returns the expected number of solutions based on given grids', () => {
+    expect(getMazePath(0, 0, 1, 1).length).toEqual(2);
+    expect(getMazePath(0, 0, 2, 2).length).toEqual(6);
+    expect(getMazePath(0, 0, 3, 3).length).toEqual(20);
+    expect(getMazePath(0, 0, 4, 4).length).toEqual(70);
+
+    expect(getMazePath(1, 1, 4, 4).length).toEqual(20);
+  });
+
+  it('returns an empty array when the start and end coordinates are equal', () => {
+    const solutions = getMazePath(2, 2, 2, 2);
+
+    expect(solutions).toEqual(['']);
+  });
+
+  it('returns an empty array when the start coordinates are greater than the end coordinates', () => {
+    const solutions = getMazePath(2, 2, 1, 1);
+
+    expect(solutions).toEqual([]);
+  });
+});

src/_Problems_/get-mazePath/index.js

@@ -7,10 +7,7 @@
 // --->> er = end row
 // --->> ec = end column
 
-
-
-
-let getMazePath = (cr, cc, er, ec) => {
+const getMazePath = (cr, cc, er, ec) => {
     if(cr == er && cc == ec) {              //============POSITIVE BASE CASE===========
         let br = [];
         br.push('');
@@ -37,6 +34,4 @@ let getMazePath = (cr, cc, er, ec) => {
     return myResult;
 }
 
-
-let path = getMazePath(0, 0, 2, 2);
-console.log(path);
+module.exports = { getMazePath };