Added tests for UrlValidator

module/Core/test/Util/UrlValidatorTest.php

@@ -0,0 +1,66 @@
+<?php
+
+declare(strict_types=1);
+
+namespace ShlinkioTest\Shlink\Core\Util;
+
+use Fig\Http\Message\RequestMethodInterface;
+use GuzzleHttp\ClientInterface;
+use GuzzleHttp\Exception\ClientException;
+use PHPUnit\Framework\TestCase;
+use Prophecy\Argument;
+use Prophecy\Prophecy\ObjectProphecy;
+use Shlinkio\Shlink\Core\Exception\InvalidUrlException;
+use Shlinkio\Shlink\Core\Util\UrlValidator;
+use Zend\Diactoros\Request;
+
+class UrlValidatorTest extends TestCase
+{
+    /** @var UrlValidator */
+    private $urlValidator;
+    /** @var ObjectProphecy */
+    private $httpClient;
+
+    public function setUp(): void
+    {
+        $this->httpClient = $this->prophesize(ClientInterface::class);
+        $this->urlValidator = new UrlValidator($this->httpClient->reveal());
+    }
+
+    /** @test */
+    public function exceptionIsThrownWhenUrlIsInvalid(): void
+    {
+        $request = $this->httpClient->request(Argument::cetera())->willThrow(
+            new ClientException('', $this->prophesize(Request::class)->reveal())
+        );
+
+        $this->expectException(InvalidUrlException::class);
+        $request->shouldBeCalledOnce();
+
+        $this->urlValidator->validateUrl('http://foobar.com/12345/hello?foo=bar');
+    }
+
+    /**
+     * @test
+     * @dataProvider provideUrls
+     */
+    public function expectedUrlIsCalledInOrderToVerifyProvidedUrl(string $providedUrl, string $expectedUrl): void
+    {
+        $request = $this->httpClient->request(
+            RequestMethodInterface::METHOD_GET,
+            $expectedUrl,
+            Argument::cetera()
+        )->will(function () {
+        });
+
+        $this->urlValidator->validateUrl($providedUrl);
+
+        $request->shouldHaveBeenCalledOnce();
+    }
+
+    public function provideUrls(): iterable
+    {
+        yield 'regular domain' => ['http://foobar.com', 'http://foobar.com'];
+        yield 'IDN' => ['https://cédric.laubacher.io/', 'https://xn--cdric-bsa.laubacher.io/'];
+    }
+}