use BufferAttribute as mock to supress warnings

test/unit/core/InstancedBufferGeometry.js

@@ -20,16 +20,16 @@ test( "copy", function() {
 	var instanceMock1 = {};
 	var instanceMock2 = {};
 	var indexMock = createClonableMock();
-	var attributeMock1 = {};
-	var attributeMock2 = {};
+	var defaultAttribute1 = new THREE.BufferAttribute([1]);
+	var defaultAttribute2 = new THREE.BufferAttribute([2]);
 
 	var instance = new THREE.InstancedBufferGeometry();
 
 	instance.addGroup( 0, 10, instanceMock1 );
 	instance.addGroup( 10, 5, instanceMock2 );
 	instance.setIndex( indexMock );
-	instance.addAttribute( 'attributeMock1', attributeMock1 );
-	instance.addAttribute( 'attributeMock2', attributeMock2 );
+	instance.addAttribute( 'defaultAttribute1', defaultAttribute1 );
+	instance.addAttribute( 'defaultAttribute2', defaultAttribute2 );
 
 	var copiedInstance = instance.copy( instance );
 
@@ -38,10 +38,10 @@ test( "copy", function() {
 	ok( copiedInstance.index === indexMock, "index was copied" );
 	ok( copiedInstance.index.callCount === 1, "index.clone was called once" );
 
-	ok( copiedInstance.attributes['attributeMock1'] instanceof THREE.BufferAttribute, "attribute was created" );
+	ok( copiedInstance.attributes['defaultAttribute1'] instanceof THREE.BufferAttribute, "attribute was created" );
 	// the given attribute mock was passed to the array property of the created buffer attribute
-	ok( copiedInstance.attributes['attributeMock1'].array === attributeMock1, "attribute was copied" );
-	ok( copiedInstance.attributes['attributeMock2'].array === attributeMock2, "attribute was copied" );
+	ok( copiedInstance.attributes['defaultAttribute1'].array[0] === defaultAttribute1.array, "attribute was copied" );
+	ok( copiedInstance.attributes['defaultAttribute2'].array[0] === defaultAttribute2.array, "attribute was copied" );
 
 	ok( copiedInstance.groups[0].start === 0, "group was copied" );
 	ok( copiedInstance.groups[0].count === 10, "group was copied" );