Semaphores fully implemented

tests/Sem/SemaphoreTest.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace NoccyLabs\Ipc\Sem;
+
+use NoccyLabs\Ipc\Key\FileKey;
+
+
+
+class SemaphoreTest extends \PhpUnit\Framework\TestCase
+{
+
+    public function testCreatingAndAquiringSemaphore()
+    {
+        $key = new FileKey(__FILE__);
+        $sem = new Semaphore($key, 2);
+
+        $this->assertTrue($sem->acquire());
+        $this->assertTrue($sem->acquire());
+        $this->assertFalse($sem->acquire());
+        $this->assertTrue($sem->release());
+        $this->assertTrue($sem->acquire());
+        $this->assertFalse($sem->acquire());
+        $this->assertTrue($sem->release());
+        $this->assertTrue($sem->release());
+    }
+
+}