Created Test Driven Development (markdown)

Test-Driven-Development.md

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+Tests
+======
+
+You can run specs with ```embark spec```, it will run any files ending *_spec.js under ```spec/```.
+
+Embark includes a testing lib to fastly run & test your contracts in a EVM. 
+
+```Javascript
+# spec/contracts/simple_storage_spec.js
+EmbarkSpec = require('embark-framework').Tests;
+
+describe("SimpleStorage", function() {
+  beforeAll(function() {
+    // equivalent to initializing SimpleStorage with param 150
+    SimpleStorage = EmbarkSpec.request("SimpleStorage", [150]);
+  });
+
+  it("should set constructor value", function() {
+    expect(SimpleStorage.storedData()).toEqual('150');
+  });
+
+  it("set storage value", function() {
+    SimpleStorage.set(100);
+    expect(SimpleStorage.get()).toEqual('100');
+  });
+
+})
+
+Embark uses [Jasmine](https://jasmine.github.io/2.3/introduction.html) by default, but you can use any testing framework you want.
+
+```