three.js/test/unit/src/core/InstancedInterleavedBuffer.js

/**
 * @author simonThiele / https://github.com/simonThiele
 */

QUnit.module( "InstancedInterleavedBuffer" );

QUnit.test( "can be created", function( assert ) {
	var array = new Float32Array( [1, 2, 3, 7, 8, 9] );
	var instance = new THREE.InstancedInterleavedBuffer( array, 3 );

	assert.ok( instance.meshPerAttribute === 1, "ok" );
});

QUnit.test( "copy" , function( assert ) {
	var array = new Float32Array( [1, 2, 3, 7, 8, 9] );
	var instance = new THREE.InstancedInterleavedBuffer( array, 3 );
	var copiedInstance = instance.copy( instance );

	assert.ok( copiedInstance.meshPerAttribute === 1, "additional attribute was copied" );
});