fix notification chanels and more tests (#108)

* fix notification chanels and more tests

* fix code style

tests/Unit/SSHCommands/PHP/InstallComposerCommandTest.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace Tests\Unit\SSHCommands\PHP;
+
+use App\SSHCommands\PHP\InstallComposerCommand;
+use Tests\TestCase;
+
+class InstallComposerCommandTest extends TestCase
+{
+    public function test_generate_command()
+    {
+        $command = new InstallComposerCommand();
+
+        $expected = <<<'EOD'
+        cd ~
+
+        curl -sS https://getcomposer.org/installer -o composer-setup.php
+
+        sudo php composer-setup.php --install-dir=/usr/local/bin --filename=composer
+
+        composer
+        EOD;
+
+        $this->assertStringContainsString($expected, $command->content());
+    }
+}