add unit test

test/core/PrimitiveStringTest.class.php

@@ -0,0 +1,25 @@
+<?php
+
+	final class PrimitiveStringTest extends TestCase
+	{
+		public function testImport()
+		{
+			$prm = Primitive::string('name');
+
+			$nullValues = array(null, '');
+
+			foreach ($nullValues as $value)
+				$this->assertNull($prm->importValue($value));
+
+			$falseValues = array(array(), true, false, $prm);
+
+			foreach ($falseValues as $value)
+				$this->assertFalse($prm->importValue($value));
+
+			$trueValues = array('some string', -100500, 2011.09);
+
+			foreach ($trueValues as $value)
+				$this->assertTrue($prm->importValue($value));
+		}
+	}
+?>