baoshi-was/app/Traits/TestMockSubServices.php

<?php
namespace App\Traits;

trait TestMockSubServices{
    function subMock(array $serviceDefinition){
        $mockingService=$this->createPartialMock(
            $serviceDefinition['class'],
            array_keys($serviceDefinition['methods'])
        );
        foreach ($serviceDefinition['methods'] as $mName=>$mVal){
            $mockingService->method($mName)->willReturn($mVal);
        }

        if(isset($serviceDefinition['subServices']))
            foreach ($serviceDefinition['subServices'] as $subService){
                $mockingService->instant(
                    $subService['serviceName'],
                    ($subServiceMock=function()use($subService){
                        $subServiceMock=$this->createPartialMock(
                            $subService['class'],
                            array_keys($subService['methods'])
                        );
                        if(isset($subService['methods']))
                            foreach ($subService['methods'] as $methodName=>$methodVal){
                                $subServiceMock->method($methodName)->willReturn($methodVal);
                            }
                        return $subServiceMock;
                    })()
                );
            }
        return $mockingService;
    }

}