Add ability to run single test via Test.js (#95)

Author: ignacio-chiazzo

README.md

@@ -7,7 +7,7 @@ The solutions are located under `/LeetcodeProblems`. Each problem has a test fil
 
 ### Run Tests
 
-**Unit tests:** To run all the test run `node Test.js` in the console. To run a specific problem in your console run  `node ` (e.g. `node LeetcodeProblems/Lowest_Common_Ancestor_of_a_Binary_Tree.js`).
+**Unit tests:** To run all the test run `node Test.js` in the console. To run a specific problem in your console run  `node Test.js ` (e.g. `node Test.js ./LeetcodeProblemsTests/Algorithms/easy/2Sum_Test.js`).
 
 **Linter:** This repository uses [`es-lint`](https://eslint.org/docs/latest/user-guide/command-line-interface). To run all the tests you would need to install the packages by running `npm install` followed by `npx eslint LeetcodeProblems LeetcodeProblemsTests` which will run the eslint in all problems and tests. You can also use the [flag `--fix`](https://eslint.org/docs/latest/user-guide/command-line-interface#fixing-problems) which will automatically fix some of the errors.
 

Test.js

@@ -34,7 +34,7 @@ var solve = (problem) => {
     console.log("Solving: " + problem);
 
     const tests = require(problem);  
-    console.log("*" * 100);
+    console.log("*".repeat(100));
     if (Object.keys(tests).length == 0) {
       console.warn("🔴 The problem " + problem + " doesn't have a test method implemented.\n");
       return;
@@ -65,4 +65,10 @@ var loadProblemsFiles = (folder) => {
   });
 };
 
-test_all();
+if (process.argv.length > 2) {
+  const path = process.argv.pop();
+  solve(path);
+} else {
+  test_all();
+}
+