Add phantomjs test runner (from https://github.com/jbnicolai/MathBox.js/)

Author: glepretre

test/TestRunner.js

@@ -0,0 +1,28 @@
+// Run tests in PhantomJS
+//
+// Exits with status code 0 is all tests pass, or 1 if any fail.
+// Pipes successful assertions to stdout and errors to stderr
+//
+// Run with $ phantomjs TestRunner.js
+//
+var page = require('webpage').create();
+page.open('./test.html', function() {
+
+    // get an array, with as the first element the test strings and second the test results
+    var testOutput = page.evaluate(function () {
+        return document.getElementById('test-output').textContent.split('Tests: ');
+    });
+
+    var passed = testOutput[0].match(/✔[^✔✘]*/g) || [];
+    for (var i = 0; i < passed.length; i++) {
+        console.log(passed[i]);
+    }
+
+    var failed = testOutput[0].match(/✘[^✔✘]*/g) || [];
+    for (var j = 0; j < failed.length; j++) {
+        console.error(failed[j]);
+    }
+
+    console.log('Tests: ' + testOutput[1]);
+    phantom.exit(failed.length ? 1 : 0);
+});