Rename all test files from JS -> ES6

test/javascripts/mixins/singleton-test.js

@@ -0,0 +1,96 @@
+import EmberObject from "@ember/object";
+import Singleton from "discourse/mixins/singleton";
+
+QUnit.module("mixin:singleton");
+
+QUnit.test("current", assert => {
+  var DummyModel = EmberObject.extend({});
+  DummyModel.reopenClass(Singleton);
+
+  var current = DummyModel.current();
+  assert.present(current, "current returns the current instance");
+  assert.equal(
+    current,
+    DummyModel.current(),
+    "calling it again returns the same instance"
+  );
+  assert.notEqual(
+    current,
+    DummyModel.create({}),
+    "we can create other instances that are not the same as current"
+  );
+});
+
+QUnit.test("currentProp reading", assert => {
+  var DummyModel = EmberObject.extend({});
+  DummyModel.reopenClass(Singleton);
+  var current = DummyModel.current();
+
+  assert.blank(
+    DummyModel.currentProp("evil"),
+    "by default attributes are blank"
+  );
+  current.set("evil", "trout");
+  assert.equal(
+    DummyModel.currentProp("evil"),
+    "trout",
+    "after changing the instance, the value is set"
+  );
+});
+
+QUnit.test("currentProp writing", assert => {
+  var DummyModel = EmberObject.extend({});
+  DummyModel.reopenClass(Singleton);
+
+  assert.blank(
+    DummyModel.currentProp("adventure"),
+    "by default attributes are blank"
+  );
+  var result = DummyModel.currentProp("adventure", "time");
+  assert.equal(result, "time", "it returns the new value");
+  assert.equal(
+    DummyModel.currentProp("adventure"),
+    "time",
+    "after calling currentProp the value is set"
+  );
+
+  DummyModel.currentProp("count", 0);
+  assert.equal(DummyModel.currentProp("count"), 0, "we can set the value to 0");
+
+  DummyModel.currentProp("adventure", null);
+  assert.equal(
+    DummyModel.currentProp("adventure"),
+    null,
+    "we can set the value to null"
+  );
+});
+
+QUnit.test("createCurrent", assert => {
+  var Shoe = EmberObject.extend({});
+  Shoe.reopenClass(Singleton, {
+    createCurrent: function() {
+      return Shoe.create({ toes: 5 });
+    }
+  });
+
+  assert.equal(
+    Shoe.currentProp("toes"),
+    5,
+    "it created the class using `createCurrent`"
+  );
+});
+
+QUnit.test("createCurrent that returns null", assert => {
+  var Missing = EmberObject.extend({});
+  Missing.reopenClass(Singleton, {
+    createCurrent: function() {
+      return null;
+    }
+  });
+
+  assert.blank(Missing.current(), "it doesn't return an instance");
+  assert.blank(
+    Missing.currentProp("madeup"),
+    "it won't raise an error asking for a property. Will just return null."
+  );
+});