How to test and mock guzzle responses in different situations?

I want to test my API controller that using some guzzle requests from another services. I have one request for making a download link.

1. this is my API route

   Route::group(['prefix' => '/v1'], function () {
   Route::get('/exampledl', 'DownloadController@downloadChecker');
   });
   
   

2. DownloadChecker controller checks if user is admin or subscriber makes a guzzle request to one of my services on a different domain, if not do another Guzzle request to another service and for each situations responses are different. This is a part of controller checks admin role.

   $client = new Client();
   try {
       $response = $client->request('GET', 'https://www.example.com/api/user?u=' . $request->uid);
       $json = \GuzzleHttp\json_decode($response->getBody()->getContents(), True);
   
       // if user doesn't exist in CM
   
       //this part has been written to avoid repeating code
       if (array_key_exists('user', $json) && $json['user'] == null) {
           abort(403);
       }
       elseif (in_array("administrator", $json['Roles'])) {
           User::create([
               'uid'               => (int)$request->uid,
               'subscription.role' => 'administrator',
           ]);
           $client = new Client();
   $response = $client->request('GET', "https://vod.example2.com/vod/2.0/videos/{$a_id}?secure_ip={$u_ip}", [
       'headers' => [
           'authorization' => '**********'
       ]
   ]);
   $json = \GuzzleHttp\json_decode($response->getBody()->getContents(), TRUE);
   
   if (isset($json['data']['mp4_videos'])) {
       $links = [];
       foreach ($json['data']['mp4_videos'] as $mp_video) {
           if (stripos($mp_video, "h_144") !== false) {
               $links['144p'] = $mp_video;
           }
           elseif (stripos($mp_video, "h_240") !== false) {
               $links['240p'] = $mp_video;
           }
           elseif (stripos($mp_video, "h_360") !== false) {
               $links['360p'] = $mp_video;
           }
           elseif (stripos($mp_video, "h_480") !== false) {
               $links['480p'] = $mp_video;
           }
           elseif (stripos($mp_video, "h_720") !== false) {
               $links['720p'] = $mp_video;
           }
           elseif (stripos($mp_video, "h_1080") !== false) {
               $links['1080p'] = $mp_video;
           }
       }
       }
   
   

3. one of my tests.

   public function test_user_notExist_admin()
   {
   $client = new Client();
   $response = $client->request('GET', 'https://www.example.com/api/user_days_and_roles?u=' . request()->uid);
   $json = \GuzzleHttp\json_decode($response->getBody()->getContents(), True);
   
   $this->get('/api/v1/exampledl?uid=1&n_id=400&u_ip=104.58.1.45&arvan_id=a81498a9')
       ->assertStatus(200)
       ->assertSee('links');
   
   $this->assertDatabaseHas('users', [
       'uid'               => (int)request('uid'),
       'subscription.role' => 'administrator',
   ]);
   }
   
   

There are some other conditions check and I'm not sure how to mock these different situations.

Should I make unit test for every situations? Or is there any way to make guzzle in test environment return a custom response? Or any other way?

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