Rename all test files from JS -> ES6

test/javascripts/components/d-icon-test.js

@@ -0,0 +1,31 @@
+import componentTest from "helpers/component-test";
+
+moduleForComponent("d-icon", { integration: true });
+
+componentTest("default", {
+  template: '{{d-icon "bars"}}',
+
+  test(assert) {
+    const html = this.$()
+      .html()
+      .trim();
+    assert.equal(
+      html,
+      '<svg class="fa d-icon d-icon-bars svg-icon svg-string" xmlns="http://www.w3.org/2000/svg"><use xlink:href="#bars"></use></svg>'
+    );
+  }
+});
+
+componentTest("with replacement", {
+  template: '{{d-icon "d-watching"}}',
+
+  test(assert) {
+    const html = this.$()
+      .html()
+      .trim();
+    assert.equal(
+      html,
+      '<svg class="fa d-icon d-icon-d-watching svg-icon svg-string" xmlns="http://www.w3.org/2000/svg"><use xlink:href="#discourse-bell-exclamation"></use></svg>'
+    );
+  }
+});