function testInit_Trivial() {
  variableModelTest_setUp();
  variable = new Blockly.VariableModel(workspace, 'test', 'test_type',
    'test_id');
  assertEquals('test', variable.name);
  assertEquals('test_type', variable.type);
  assertEquals('test_id', variable.id_);
  variableModelTest_tearDown();
}
These tests check the constructor of the variable model.