Add a test for command ListUsers (test emails)

tests/Command/AbstractCommandTest.php

@@ -0,0 +1,50 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace App\Tests\Command;
+
+use Symfony\Bundle\FrameworkBundle\Console\Application;
+use Symfony\Bundle\FrameworkBundle\Test\KernelTestCase;
+use Symfony\Component\Console\Tester\CommandTester;
+
+abstract class AbstractCommandTest extends KernelTestCase
+{
+    protected function setUp(): void
+    {
+        if ('Windows' === \PHP_OS_FAMILY) {
+            $this->markTestSkipped('`stty` is required to test this command.');
+        }
+    }
+
+    /**
+     * This helper method abstracts the boilerplate code needed to test the
+     * execution of a command.
+     *
+     * @param array $arguments All the arguments passed when executing the command
+     * @param array $inputs    The (optional) answers given to the command when it asks for the value of the missing arguments
+     */
+    protected function executeCommand(array $arguments, array $inputs = []): CommandTester
+    {
+        self::bootKernel();
+
+        // this uses a special testing container that allows you to fetch private services
+        $command = self::$container->get($this->getCommandFqcn());
+        $command->setApplication(new Application(self::$kernel));
+
+        $commandTester = new CommandTester($command);
+        $commandTester->setInputs($inputs);
+        $commandTester->execute($arguments);
+
+        return $commandTester;
+    }
+
+    abstract protected function getCommandFqcn(): string;
+}

tests/Command/AddUserCommandTest.php

@@ -13,11 +13,8 @@
 
 use App\Command\AddUserCommand;
 use App\Repository\UserRepository;
-use Symfony\Bundle\FrameworkBundle\Console\Application;
-use Symfony\Bundle\FrameworkBundle\Test\KernelTestCase;
-use Symfony\Component\Console\Tester\CommandTester;
 
-class AddUserCommandTest extends KernelTestCase
+class AddUserCommandTest extends AbstractCommandTest
 {
     private $userData = [
         'username' => 'chuck_norris',
@@ -26,13 +23,6 @@ class AddUserCommandTest extends KernelTestCase
         'full-name' => 'Chuck Norris',
     ];
 
-    protected function setUp(): void
-    {
-        if ('Windows' === \PHP_OS_FAMILY) {
-            $this->markTestSkipped('Windows OS does not support testing this command.');
-        }
-    }
-
     /**
      * @dataProvider isAdminDataProvider
      *
@@ -97,23 +87,8 @@ private function assertUserCreated(bool $isAdmin): void
         $this->assertSame($isAdmin ? ['ROLE_ADMIN'] : ['ROLE_USER'], $user->getRoles());
     }
 
-    /**
-     * This helper method abstracts the boilerplate code needed to test the
-     * execution of a command.
-     *
-     * @param array $arguments All the arguments passed when executing the command
-     * @param array $inputs    The (optional) answers given to the command when it asks for the value of the missing arguments
-     */
-    private function executeCommand(array $arguments, array $inputs = []): void
+    protected function getCommandFqcn(): string
     {
-        self::bootKernel();
-
-        // this uses a special testing container that allows you to fetch private services
-        $command = self::$container->get(AddUserCommand::class);
-        $command->setApplication(new Application(self::$kernel));
-
-        $commandTester = new CommandTester($command);
-        $commandTester->setInputs($inputs);
-        $commandTester->execute($arguments);
+        return AddUserCommand::class;
     }
 }

tests/Command/ListUsersCommandTest.php

@@ -0,0 +1,57 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace App\Tests\Command;
+
+use App\Command\ListUsersCommand;
+
+class ListUsersCommandTest extends AbstractCommandTest
+{
+    /**
+     * @dataProvider maxResultsProvider
+     *
+     * This test verifies the amount of data is right according to the given parameter max results.
+     */
+    public function testListUsers(int $maxResults): void
+    {
+        $tester = $this->executeCommand(
+            ['--max-results' => $maxResults]
+        );
+
+        $emptyDisplayLines = 5;
+        $this->assertSame($emptyDisplayLines + $maxResults, mb_substr_count($tester->getDisplay(), "\n"));
+    }
+
+    public function maxResultsProvider(): ?\Generator
+    {
+        yield [1];
+        yield [2];
+    }
+
+    public function testItSendsNoEmailByDefault(): void
+    {
+        $this->executeCommand([]);
+
+        $this->assertEmailCount(0);
+    }
+
+    public function testItSendsAnEmailIfOptionProvided(): void
+    {
+        $this->executeCommand(['--send-to' => '[email protected]']);
+
+        $this->assertEmailCount(1);
+    }
+
+    protected function getCommandFqcn(): string
+    {
+        return ListUsersCommand::class;
+    }
+}