Added unit tests

Added unit tests

Author: Sheeshpaul Kamboj

.babelrc.js

@@ -0,0 +1,10 @@
+module.exports = {
+    presets: [
+        '@babel/typescript',
+        '@babel/env'
+    ],
+    plugins: [
+        '@babel/proposal-class-properties',
+        '@babel/proposal-object-rest-spread'
+    ]
+}

.vscode/launch.json

@@ -0,0 +1,35 @@
+{
+    "version": "0.2.0",
+    "configurations": [
+      {
+        "type": "node",
+        "request": "launch",
+        "name": "Jest All",
+        "program": "${workspaceFolder}/node_modules/.bin/jest",
+        "args": ["--runInBand"],
+        "console": "integratedTerminal",
+        "internalConsoleOptions": "neverOpen",
+        "disableOptimisticBPs": true,
+        "windows": {
+          "program": "${workspaceFolder}/node_modules/jest/bin/jest",
+        }
+      },
+      {
+        "type": "node",
+        "request": "launch",
+        "name": "Jest Current File",
+        "program": "${workspaceFolder}/node_modules/.bin/jest",
+        "args": [
+          "${fileBasenameNoExtension}",
+          "--config",
+          "jest.config.js"
+        ],
+        "console": "integratedTerminal",
+        "internalConsoleOptions": "neverOpen",
+        "disableOptimisticBPs": true,
+        "windows": {
+          "program": "${workspaceFolder}/node_modules/jest/bin/jest",
+        }
+      }
+    ]
+  }