Add unit tests for behaviors

tests/src/behaviors.es6.js

@@ -0,0 +1,42 @@
+let expect = chai.expect;
+describe('The behavior shim', () => {
+	let scene, cube;
+	beforeEach(() => {
+		scene = new THREE.Scene();
+		cube = new THREE.Mesh(
+			new THREE.BoxGeometry(1, 1, 1),
+			new THREE.MeshBasicMaterial({ color: 'red' }));
+		scene.add(cube);
+	});
+	it('can add and retrieve behavior', () => {
+		cube.addBehavior({type: 'Foo'});
+		expect(cube.getBehaviorByType('Foo')).to.exist;
+	});
+	it('can add multiple behaviors', () => {
+		cube.addBehaviors({type: 'Foo'}, {type: 'Bar'});
+		expect(cube.getBehaviorByType('Foo').type).to.equal('Foo');
+		expect(cube.getBehaviorByType('Bar').type).to.equal('Bar');
+	});
+	it('can update behaviors', () => {
+		var updatedFoo = false;
+		var updatedBar = false;
+		cube.addBehaviors(
+			{update: () => { updatedFoo = true }, type: 'Foo'},
+			{update: () => { updatedBar = true }, type: 'Bar'});
+		cube.updateBehaviors();
+		expect(updatedFoo).to.be.true;
+		expect(updatedBar).to.be.true;
+	});
+	it('can remove a behavior', () => {
+		var behavior = {type: 'Foo'};
+		cube.addBehavior(behavior);
+		cube.removeBehavior(behavior);
+		expect(cube.getBehaviorByType('Foo')).to.not.exist;
+	});
+	it('can remove all behaviors', () => {
+		cube.addBehaviors({type: 'Foo'}, {type: 'Bar'});
+		cube.removeAllBehaviors();
+		expect(cube.getBehaviorByType('Foo')).to.not.exist;
+		expect(cube.getBehaviorByType('Bar')).to.not.exist;
+	});
+});