test("just modelName", function(assert) {
      let attrs = attributesFor('user');

      let expectedAttrs = {
        "name": "User1",
        "style": "normal"
      };

      assert.deepEqual(attrs, expectedAttrs);
    });
    test("with traits", function(assert) {
      let attrs = attributesFor('user', 'silly');

      let expectedAttrs = {
        "name": "User1",
        "style": "silly"
      };

      assert.deepEqual(attrs, expectedAttrs);
    });
    test("with traits and options", function(assert) {
      let attrs = attributesFor('user', 'silly', {name: 'bob'});

      let expectedAttrs = {
        "name": "bob",
        "style": "silly"
      };

      assert.deepEqual(attrs, expectedAttrs);
    });