Test and lint fixes.

src/sprites/rendered-target.js

@@ -156,6 +156,8 @@ class RenderedTarget extends Target {
 
     /**
      * Create a drawable with the this.renderer.
+     * @param {boolean} isStage Whether the drawable should be initialized as
+     * the stage or a sprite
      */
     initDrawable (isStage) {
         if (this.renderer) {

test/fixtures/fake-renderer.js

@@ -42,7 +42,7 @@ FakeRenderer.prototype.getBounds = function (d) { // eslint-disable-line no-unus
     return {left: this.x, right: this.x, top: this.y, bottom: this.y};
 };
 
-FakeRenderer.prototype.setDrawableOrder = function (d, a, optA, optB) { // eslint-disable-line no-unused-vars
+FakeRenderer.prototype.setDrawableOrder = function (d, a, optG, optA, optB) { // eslint-disable-line no-unused-vars
     if (d === 999) return 1; // fake for test case
     if (optA) {
         a += this.order;
@@ -63,4 +63,6 @@ FakeRenderer.prototype.isTouchingColor = function (a, b) { // eslint-disable-lin
     return false;
 };
 
+FakeRenderer.prototype.setLayerGroupOrdering = function (a) {}; // eslint-disable-line no-unused-vars
+
 module.exports = FakeRenderer;

test/unit/sprites_rendered-target.js

@@ -302,7 +302,7 @@ test('colorIsTouchingColor', t => {
     t.end();
 });
 
-test('layers', t => {
+test('layers', t => { // TODO this tests fake functionality. Move layering tests into Render.
     const s = new Sprite();
     const r = new Runtime();
     const renderer = new FakeRenderer();
@@ -315,9 +315,11 @@ test('layers', t => {
     a.goBackwardLayers(2);
     t.equals(a.renderer.order, 3);
     a.goToBack();
-    t.equals(a.renderer.order, 1);
+    // Note, there are only sprites in this test, no stage, and the addition
+    // of layer groups, goToBack no longer specifies a minimum order number
+    t.equals(a.renderer.order, 0);
     a.goForwardLayers(1);
-    t.equals(a.renderer.order, 2);
+    t.equals(a.renderer.order, 1);
     o.drawableID = 999;
     a.goBehindOther(o);
     t.equals(a.renderer.order, 1);