Initialized a new vscode-extension.

test/extension.test.ts

@@ -0,0 +1,22 @@
+//
+// Note: This example test is leveraging the Mocha test framework.
+// Please refer to their documentation on https://mochajs.org/ for help.
+//
+
+// The module 'assert' provides assertion methods from node
+import * as assert from 'assert';
+
+// You can import and use all API from the 'vscode' module
+// as well as import your extension to test it
+import * as vscode from 'vscode';
+import * as myExtension from '../src/code-stats';
+
+// Defines a Mocha test suite to group tests of similar kind together
+suite("Extension Tests", () => {
+
+    // Defines a Mocha unit test
+    test("Something 1", () => {
+        assert.equal(-1, [1, 2, 3].indexOf(5));
+        assert.equal(-1, [1, 2, 3].indexOf(0));
+    });
+});