// joints
model.addCategory("Joints");
model.addTest(new PrismaticTest());
model.addTest(new RevoluteTest());
model.addTest(new FixedPendulumTest(true));
model.addTest(new FreePendulumTest(true));
model.addTest(new MotorTest());
model.addTest(new Chain());
model.addTest(new RopeTest());
model.addTest(new Pulleys());
model.addTest(new Gears());