Added missing tests for Common module

module/Common/test/Service/IpLocationResolverTest.php

@@ -0,0 +1,56 @@
+<?php
+namespace ShlinkioTest\Shlink\Common\Service;
+
+use GuzzleHttp\Client;
+use GuzzleHttp\Exception\TransferException;
+use GuzzleHttp\Psr7\Response;
+use PHPUnit_Framework_TestCase as TestCase;
+use Prophecy\Prophecy\ObjectProphecy;
+use Shlinkio\Shlink\Common\Service\IpLocationResolver;
+
+class IpLocationResolverTest extends TestCase
+{
+    /**
+     * @var IpLocationResolver
+     */
+    protected $ipResolver;
+    /**
+     * @var ObjectProphecy
+     */
+    protected $client;
+
+    public function setUp()
+    {
+        $this->client = $this->prophesize(Client::class);
+        $this->ipResolver = new IpLocationResolver($this->client->reveal());
+    }
+
+    /**
+     * @test
+     */
+    public function correctIpReturnsDecodedInfo()
+    {
+        $expected = [
+            'foo' => 'bar',
+            'baz' => 'foo',
+        ];
+        $response = new Response();
+        $response->getBody()->write(json_encode($expected));
+        $response->getBody()->rewind();
+
+        $this->client->get('http://freegeoip.net/json/1.2.3.4')->willReturn($response)
+                                                               ->shouldBeCalledTimes(1);
+        $this->assertEquals($expected, $this->ipResolver->resolveIpLocation('1.2.3.4'));
+    }
+
+    /**
+     * @test
+     * @expectedException \Shlinkio\Shlink\Common\Exception\WrongIpException
+     */
+    public function guzzleExceptionThrowsShlinkException()
+    {
+        $this->client->get('http://freegeoip.net/json/1.2.3.4')->willThrow(new TransferException())
+                                                               ->shouldBeCalledTimes(1);
+        $this->ipResolver->resolveIpLocation('1.2.3.4');
+    }
+}