fix notification chanels and more tests (#108)

* fix notification chanels and more tests

* fix code style

tests/Unit/SSHCommands/PHP/InstallPHPExtensionCommandTest.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace Tests\Unit\SSHCommands\PHP;
+
+use App\SSHCommands\PHP\InstallPHPExtensionCommand;
+use Tests\TestCase;
+
+class InstallPHPExtensionCommandTest extends TestCase
+{
+    public function test_generate_command()
+    {
+        $command = new InstallPHPExtensionCommand('8.1', 'imagick');
+
+        $expected = <<<'EOD'
+        sudo apt install -y php8.1-imagick
+
+        sudo service php8.1-fpm restart
+
+        php8.1 -m
+        EOD;
+
+        $this->assertStringContainsString($expected, $command->content());
+    }
+}