Add the minimum unit tests.

tests/run.js

@@ -0,0 +1,45 @@
+/*global system:true, fs:true, Reflect:true */
+system.print('Running unit tests for HammerJS...');
+
+var total = 0;
+
+function assert(passed) {
+    total += 1;
+    if (!passed) {
+        throw new Error('Test FAILS');
+    }
+}
+
+function test_fs() {
+    assert(typeof fs === 'function');
+    assert(typeof fs.exists === 'function');
+    assert(typeof fs.isDirectory === 'function');
+    assert(typeof fs.isFile === 'function');
+    assert(typeof fs.makeDirectory === 'function');
+    assert(typeof fs.list === 'function');
+    assert(typeof fs.open === 'function');
+    assert(typeof fs.workingDirectory === 'function');
+}
+
+function test_system() {
+    assert(typeof system === 'function');
+    assert(typeof system.execute === 'function');
+    assert(typeof system.exit === 'function');
+    assert(typeof system.print === 'function');
+}
+
+function test_Reflect() {
+    assert(typeof Reflect === 'function');
+    assert(typeof Reflect.parse === 'function');
+}
+
+try {
+    test_fs();
+    test_system();
+    test_Reflect();
+} catch (e) {
+    system.print(e.message);
+    system.print(e.stack);
+}
+
+system.print('No failure. Total tests: ' + total + ' tests.');