Added a test

Author: Martin Brecht-Precht

test/StringBuilderTest.php

@@ -37,7 +37,7 @@ public function testBuilder()
 		$this->assertEquals(9, $builder->indexOf('e', 4));
 		$this->assertNull($builder->indexOf('e', 10));
 		$this->assertEquals(9, $builder->lastIndexOf('e'));
-		$this->assertNull($builder->lastIndexOf('e',10));
+		$this->assertNull($builder->lastIndexOf('e', 10));
 		$this->assertTrue($builder->contains('21b'));
 		$this->assertEquals('b', $builder->firstChar());
 		$this->assertEquals('ö', $builder->lastChar());
@@ -53,6 +53,12 @@ public function testBuilder()
 		$this->assertEquals('02356', $builder->build());
 	}
 
+	public function testBuilderNull()
+	{
+		$builder = new StringBuilder();
+		$this->assertNull($builder->build());
+	}
+
 	public function testBuilderConstructFail()
 	{
 		$this->setExpectedException(get_class(new \InvalidArgumentException()));