expectValidateAt example

$this->constraint = new Form();
    }

    public function testValidate()
    {
        $object = new \stdClass();
        $options = ['validation_groups' => ['group1', 'group2']];
        $form = $this->getCompoundForm($object, $options);
        $form->submit([]);

        $this->expectValidateAt(0, 'data', $object, ['group1', 'group2']);

        $this->validator->validate($form, new Form());

        $this->assertNoViolation();
    }

    public function testValidateConstraints()
    {
        $object = new \stdClass();
        $constraint1 = new NotNull(['groups' => ['group1', 'group2']]);
        $constraint2 = new NotBlank(['groups' => 'group2']);