Created unit test for ListDomainsCommand

module/CLI/test/Command/Domain/ListDomainsCommandTest.php

@@ -0,0 +1,56 @@
+<?php
+
+declare(strict_types=1);
+
+namespace ShlinkioTest\Shlink\CLI\Command\Domain;
+
+use PHPUnit\Framework\TestCase;
+use Prophecy\Prophecy\ObjectProphecy;
+use Shlinkio\Shlink\CLI\Command\Domain\ListDomainsCommand;
+use Shlinkio\Shlink\CLI\Util\ExitCodes;
+use Shlinkio\Shlink\Core\Domain\DomainServiceInterface;
+use Shlinkio\Shlink\Core\Entity\Domain;
+use Symfony\Component\Console\Application;
+use Symfony\Component\Console\Tester\CommandTester;
+
+class ListDomainsCommandTest extends TestCase
+{
+    private CommandTester $commandTester;
+    private ObjectProphecy $domainService;
+
+    public function setUp(): void
+    {
+        $this->domainService = $this->prophesize(DomainServiceInterface::class);
+
+        $command = new ListDomainsCommand($this->domainService->reveal(), 'foo.com');
+        $app = new Application();
+        $app->add($command);
+
+        $this->commandTester = new CommandTester($command);
+    }
+
+    /** @test */
+    public function allDomainsAreProperlyPrinted(): void
+    {
+        $expectedOutput = <<<OUTPUT
+        +---------+------------+
+        | Domain  | Is default |
+        +---------+------------+
+        | foo.com | Yes        |
+        | bar.com | No         |
+        | baz.com | No         |
+        +---------+------------+
+
+        OUTPUT;
+        $listDomains = $this->domainService->listDomainsWithout('foo.com')->willReturn([
+            new Domain('bar.com'),
+            new Domain('baz.com'),
+        ]);
+
+        $this->commandTester->execute([]);
+
+        self::assertEquals($expectedOutput, $this->commandTester->getDisplay());
+        self::assertEquals(ExitCodes::EXIT_SUCCESS, $this->commandTester->getStatusCode());
+        $listDomains->shouldHaveBeenCalledOnce();
+    }
+}