Rename all test files from JS -> ES6

test/javascripts/lib/text-direction-test.js

@@ -0,0 +1,22 @@
+import { isRTL, isLTR } from "discourse/lib/text-direction";
+
+QUnit.module("lib:text-direction");
+
+QUnit.test("isRTL", assert => {
+  // Hebrew
+  assert.equal(isRTL("זה מבחן"), true);
+
+  // Arabic
+  assert.equal(isRTL("هذا اختبار"), true);
+
+  // Persian
+  assert.equal(isRTL("این یک امتحان است"), true);
+
+  assert.equal(isRTL("This is a test"), false);
+  assert.equal(isRTL(""), false);
+});
+
+QUnit.test("isLTR", assert => {
+  assert.equal(isLTR("This is a test"), true);
+  assert.equal(isLTR("זה מבחן"), false);
+});