Fix test script & linting errors

Author: diarmidmackenzie

reaction_components/prototypes/physics-grab-proto.js

@@ -2,7 +2,7 @@
 module.exports = {
   schema: {
     usePhysics: { default: 'ifavailable' },
-    constraintComponentName: {default: 'constraint'}
+    constraintComponentName: { default: 'constraint' }
   },
   physicsInit: function () {
     this.constraints = new Map()

reaction_components/stretchable.js

@@ -111,30 +111,30 @@ AFRAME.registerComponent('stretchable', inherit(base, {
     let offset
 
     // CANNON.js has el.body.shapes.  Ammo has collisionShapes in the shape component.
-    const shapesList = el.body.shapes ? el.body.shapes : el.components["ammo-shape"].collisionShapes;
+    const shapesList = el.body.shapes ? el.body.shapes : el.components['ammo-shape'].collisionShapes
 
-    for (let i = 0; i < shapesList; i++) {
+    for (let i = 0; i < shapesList.length; i++) {
       physicsShape = shapesList[i]
       if (physicsShape.halfExtents) {
         physicsShape.halfExtents
           .scale(deltaStretch, physicsShape.halfExtents)
         physicsShape.updateConvexPolyhedronRepresentation()
       } else if (physicsShape.radius) {
-        physicsShape.radius *= deltaStretch;
-        physicsShape.updateBoundingSphereRadius();
+        physicsShape.radius *= deltaStretch
+        physicsShape.updateBoundingSphereRadius()
       } else if (!this.shapeWarned) {
-        console.warn('Unable to stretch physics body: unsupported shape');
-        this.shapeWarned = true;
+        console.warn('Unable to stretch physics body: unsupported shape')
+        this.shapeWarned = true
       }
       // also move offset to match scale change
-      offset = el.body.shapeOffsets[i];
-      offset.scale(deltaStretch, offset);
+      offset = el.body.shapeOffsets[i]
+      offset.scale(deltaStretch, offset)
     }
     if (el.body.updateBoundingRadius) {
       // This only exists in CANNON, not Ammo.js
       // I'm not aware of any requirement to call an equivalent function
       // in Ammo.js
-      el.body.updateBoundingRadius();
+      el.body.updateBoundingRadius()
     }
   }
 }))