[4.0] Fix bug with no LinkedIn email addresses

src/Two/LinkedInProvider.php

@@ -75,7 +75,7 @@ protected function getBasicProfile($token)
             ],
         ]);
 
-        return json_decode($response->getBody(), true);
+        return (array) json_decode($response->getBody(), true);
     }
 
     /**
@@ -95,7 +95,7 @@ protected function getEmailAddress($token)
             ],
         ]);
 
-        return json_decode($response->getBody(), true)['elements'][0]['handle~'];
+        return (array) Arr::get((array) json_decode($response->getBody(), true), 'elements.0.handle~');
     }
 
     /**

tests/LinkedInProviderTest.php

@@ -0,0 +1,62 @@
+<?php
+
+namespace Laravel\Socialite\Tests;
+
+use Mockery as m;
+use GuzzleHttp\Client;
+use Illuminate\Http\Request;
+use Laravel\Socialite\Two\User;
+use PHPUnit\Framework\TestCase;
+use Psr\Http\Message\ResponseInterface;
+use Laravel\Socialite\Two\LinkedInProvider;
+
+class LinkedInProviderTest extends TestCase
+{
+    protected function tearDown()
+    {
+        parent::tearDown();
+
+        m::close();
+    }
+
+    public function test_it_can_map_a_user_without_an_email_address()
+    {
+        $request = m::mock(Request::class);
+        $request->shouldReceive('input')->with('code')->andReturn('fake-code');
+
+        $accessTokenResponse = m::mock(ResponseInterface::class);
+        $accessTokenResponse->shouldReceive('getBody')->andReturn(json_encode(['access_token' => 'fake-token']));
+
+        $basicProfileResponse = m::mock(ResponseInterface::class);
+        $basicProfileResponse->shouldReceive('getBody')->andReturn(json_encode(['id' => $userId = 1]));
+
+        // Make sure email address response contains no values.
+        $emailAddressResponse = m::mock(ResponseInterface::class);
+        $emailAddressResponse->shouldReceive('getBody')->andReturn(json_encode(['elements' => []]));
+
+        $guzzle = m::mock(Client::class);
+        $guzzle->shouldReceive('post')->once()->andReturn($accessTokenResponse);
+        $guzzle->shouldReceive('get')->with('https://api.linkedin.com/v2/me?projection=(id,firstName,lastName,profilePicture(displayImage~:playableStreams))', [
+            'headers' => [
+                'Authorization' => 'Bearer fake-token',
+                'X-RestLi-Protocol-Version' => '2.0.0',
+            ],
+        ])->andReturn($basicProfileResponse);
+        $guzzle->shouldReceive('get')->with('https://api.linkedin.com/v2/emailAddress?q=members&projection=(elements*(handle~))', [
+            'headers' => [
+                'Authorization' => 'Bearer fake-token',
+                'X-RestLi-Protocol-Version' => '2.0.0',
+            ],
+        ])->andReturn($emailAddressResponse);
+
+        $provider = new LinkedInProvider($request, 'client_id', 'client_secret', 'redirect');
+        $provider->stateless();
+        $provider->setHttpClient($guzzle);
+
+        $user = $provider->user();
+
+        $this->assertInstanceOf(User::class, $user);
+        $this->assertEquals($userId, $user->getId());
+        $this->assertEquals(null, $user->getEmail());
+    }
+}