Added __toString() method to Argument class. Added unit test

Author: pointybeard

src/CLILib/Argument.php

@@ -31,4 +31,13 @@ public function value()
     {
         return $this->value;
     }
+
+    /**
+     * Returns the $value property when casting Argument to string
+     *
+     * @return string
+     */
+    public function __toString() {
+        return (string)$this->value;
+    }
 }

tests/Argument/Test.php

@@ -0,0 +1,20 @@
+<?php
+use CLILib\Argument;
+use PHPUnit\Framework\TestCase;
+
+class ArgumentTest extends TestCase
+{
+    /**
+     * Create Argument object and check Name and Value have been set correctly.
+     */
+    public function testValidPassArgsToConstructor()
+    {
+        $a = new Argument("j", "something");
+
+        $this->assertEquals("something", $a->value());
+        $this->assertEquals("j", $a->name());
+
+        // Test casting to a string
+        $this->assertEquals("something", (string)$a);
+    }
+}