Add Acceptance Tests Kata (#45)

Author: rodolfoprr

katas/acceptance-tests/README.md

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+# Acceptance Tests
+
+## Problem Description
+
+"Acceptance tests are created from <a href="http://www.extremeprogramming.org/rules/userstories.html">user stories</a>. The customer specifies scenarios to test when a user story has been correctly implemented. A story can have one or many acceptance tests, what ever it takes to ensure the functionality works.
+
+Acceptance tests are black box system tests. Each acceptance test represents some expected result from the system. Customers are responsible for verifying the correctness of the acceptance tests and reviewing test scores to decide which failed tests are of highest priority. Acceptance tests are also used as regression tests prior to a production release."
+
+From: http://www.extremeprogramming.org/rules/functionaltests.html
+
+### 1. Choosing website to be tested
+
+- <a href="https://github.com/gothinkster/realworld">RealWorld</a>
+
+### 2. Writing user stories
+
+- <a href="https://www.mountaingoatsoftware.com/agile/user-stories">User Stories</a>
+
+### 3. Writing tests
+
+#### Tests runners
+
+- <a href="https://www.protractortest.org/#/">Protractor (JavaScript)</a>
+- <a href="https://www.cypress.io/">Cypress (JavaScript)</a>
+
+#### BDD
+
+- <a href="https://cucumber.io/">Cucumber</a>
+
+### 4. Testing in multiple browsers
+
+- <a href="https://www.browserstack.com/">BrowserStack</a>
+- <a href="https://saucelabs.com/">Sauce Labs</a>