Add test for mailman type

tests/Feature/Mailgateway/MailmanTypeTest.php

@@ -0,0 +1,46 @@
+<?php
+
+namespace Tests\Feature\Mailgateway;
+
+use App\Mailgateway\Types\MailmanType;
+use App\Mailman\Support\MailmanService;
+use Illuminate\Foundation\Testing\DatabaseTransactions;
+use Phake;
+use Tests\TestCase;
+
+class MailmanTypeTest extends TestCase
+{
+    use DatabaseTransactions;
+
+    public function testItChecksForWorks(): void
+    {
+        $this->withoutExceptionHandling();
+        $this->stubIo(MailmanService::class, function ($mock) {
+            Phake::when($mock)->setCredentials('https://example.com', 'user', 'secret')->thenReturn($mock);
+            Phake::when($mock)->check()->thenReturn(true);
+        });
+        $type = new MailmanType([
+            'url' => 'https://example.com',
+            'user' => 'user',
+            'password' => 'secret',
+        ]);
+
+        $this->assertTrue($type->works());
+    }
+
+    public function testItCanReturnFalse(): void
+    {
+        $this->withoutExceptionHandling();
+        $this->stubIo(MailmanService::class, function ($mock) {
+            Phake::when($mock)->setCredentials('https://example.com', 'user', 'secret')->thenReturn($mock);
+            Phake::when($mock)->check()->thenReturn(false);
+        });
+        $type = new MailmanType([
+            'url' => 'https://example.com',
+            'user' => 'user',
+            'password' => 'secret',
+        ]);
+
+        $this->assertFalse($type->works());
+    }
+}