Rename all test files from JS -> ES6

test/javascripts/components/html-safe-helper-test.js

@@ -0,0 +1,14 @@
+import componentTest from "helpers/component-test";
+moduleForComponent("html-safe-helper", { integration: true });
+
+componentTest("default", {
+  template: "{{html-safe string}}",
+
+  beforeEach() {
+    this.set("string", "<p class='cookies'>biscuits</p>");
+  },
+
+  async test(assert) {
+    assert.ok(exists("p.cookies"), "it displays the string as html");
+  }
+});