Add example use of karma (+ jasmine and chai)

templates/Angular2Spa/ClientApp/tests/counter.ts

@@ -0,0 +1,18 @@
+import 'angular2-universal-polyfills';
+import { assert } from 'chai';
+import { Counter } from '../components/counter/counter';
+
+describe('Counter component', () => {
+    it('should start with value 0', () => {
+        const instance = new Counter();
+        assert.equal(instance.currentCount, 0);
+    });
+
+    it('should increment the counter by 1 when requested', () => {
+        const instance = new Counter();
+        instance.incrementCounter();
+        assert.equal(instance.currentCount, 1);
+        instance.incrementCounter();
+        assert.equal(instance.currentCount, 2);
+    });
+});