PHPUnit assert no method is called

Yes, it's quite simple, try this:

$classA->expects($this->never())->method($this->anything());

You can use method MockBuilder::disableAutoReturnValueGeneration.

For example, in your test overwrite default TestCase::getMockBuilder:

    /**     * @param string $className     * @return MockBuilder     */    public function getMockBuilder($className): MockBuilder    {        // this is to make sure, that not-mocked method will not be called        return parent::getMockBuilder($className)            ->disableAutoReturnValueGeneration();    }

Advantages:

• all your mocks won't be expected to call anything than mocked methods. No need to bind ->expects(self::never())->method(self::anything()) to all of them
• you still can set new mocks. After ->expects(self::never())->method(self::anything()) you can't

Works for PhpUnit v7.5.4 (and probably, later ones).

you could also mock a method and a data provider, and make sure it never is called. without making any assertions, because it is not called, it means it has passed the test.

<?php    /**     * @dataProvider dataProvider     */    public function checkSomethingIsDisabled( $message, $config, $expected)    {        $debugMock = $this->getMockBuilder('APP_Class_Name')            ->disableOriginalConstructor()            ->setMethods(array('_helper'))            ->getMock();        $debugMock = $this->getPublicClass($debugMock);        $debugMock->_config = $config;        $viewContent = new stdClass;        $debugMock->_functionToTest($viewContent);    }    public function dataProvider()    {        return [                'dataset'=>                    [                        'message' => 'Debug Disabled',                        'config' => (object) array(                            'values' => (object) array(                                'valueThatWhenFalseDoesntExecuteFunc'=> false                            )                        ),                        // in a probably needed complimentary "imaginary" test we probably                          // will have the valueThatWhenFalseDoesntExecuteFunc set to true and on                        // expected more information to handle and test.                        'expected' => null                    ]                ];    }