[generate:controller] Error: Does not have a method 'getTestPath'

[reganking]

Problem/Motivation

• generate:controller results in error and creation of controller file at /.

• Drupal version: 8.6.7.

• Console version: 1.8.0.

How to reproduce

From docroot:

../vendor/drupal/console/bin/drupal generate:controller  \
--module="unify_event"  \
--class="MyController"  \
--routes='"title":"ControllerMethod", "name":"unify_event.view_events", "method":"view_event", "path":"/events/{name}"'  \
--test

 [ERROR] <em class="placeholder">Warning</em>: call_user_func_array() expects parameter 1 to be a valid callback,       
         class 'SplFileInfo' does not have a method 'getTestPath' in Drupal\Core\Extension\Extension->__call() (line 155 of core/lib/Drupal/Core/Extension/Extension.php). Drupal\Core\Extension\Extension->__call('getTestPath', Array) (Line: 57)        
         Drupal\Console\Generator\ControllerGenerator->generate(Array) (Line: 156)                                   
         Drupal\Console\Command\Generate\ControllerCommand->execute(Object, Object) (Line: 255)                      
         Symfony\Component\Console\Command\Command->run(Object, Object) (Line: 971)                                  
         Symfony\Component\Console\Application->doRunCommand(Object, Object, Object) (Line: 248)                     
         Symfony\Component\Console\Application->doRun(Object, Object) (Line: 185)                                    
         Drupal\Console\Core\Application->doRun(Object, Object) (Line: 64)                                           
         Drupal\Console\Application->doRun(Object, Object) (Line: 148)                                               
         Symfony\Component\Console\Application->run() (Line: 89)                                                     
         require('[...]/vendor/drupal/console/bin/drupal.php') (Line: 4) 

Notes:

• Error occurs regardless whether module is enabled or disabled.
• File MyControllerTest.php is created at / due to missing path expected from getTestPath().
• drupal/console/src/extension/Manager->getTestPath() is never called. drupal/console/src/extension/Manager->getModule() <- createExtension() is called.

In ControllerGenerator.php (erroneously calls \Drupal\Console\Extension\Extension->getTestPath()):

...
        if ($test) {
            $this->renderFile(
                'module/Tests/Controller/controller.php.twig',
                **$moduleInstance->getTestPath('Controller')** . '/' . $class . 'Test.php',
                $parameters
            );
        }
...

The `Manager->getTestPath()' takes the `testType` argument: 

public function getTestPath($testType, $fullPath = false)
{
    return $this->getPath($fullPath) . '/Tests/' . $testType;
}

Aside: Function `$this->getPath()` is not in the `Manager` class, but the class is in the `Extension` namespace.

A `\Drupal\Console\Extension\Extension->getTest**s**Path()` function exists, but doesn't have a `testType` argument.

### Temporary Solution
`sudo mv /MyControllerTest.php docroot/modules/unify_event/tests/Controller/`

### Solution
Move the `Manager->getTestPath()` `testType' argument over to `Extension->getTestsPath()` and correct `getTestPath` to `getTestsPath` in `ControllerGenerator`.

Note: This needs testing.

[LOBsTerr]

@reganking Thank you for your contribution. It has been merged