Make sure all our exception is initializeable (#360)

* Make sure all our exception is initializeable

* minor

* cs

Author: Nyholm

Diff for: tests/Unit/Exception/InitializeExceptionTest.php

@@ -0,0 +1,25 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Buzz\Test\Unit\Exception;
+
+use Buzz\Exception as BuzzException;
+use Nyholm\Psr7\Request;
+use PHPUnit\Framework\TestCase;
+
+class InitializeExceptionTest extends TestCase
+{
+    public function testInitialize()
+    {
+        $e[] = new BuzzException\ClientException();
+        $e[] = new BuzzException\InvalidArgumentException();
+        $e[] = new BuzzException\LogicException();
+        $e[] = new BuzzException\NetworkException(new Request('GET', '/'));
+        $e[] = new BuzzException\RequestException(new Request('GET', '/'));
+
+        foreach ($e as $exception) {
+            $this->assertInstanceOf(BuzzException\ExceptionInterface::class, $exception);
+        }
+    }
+}