Fixed unit tests.

Author: srtab

tests/unit/Fields/FileFieldTest.php

@@ -22,12 +22,13 @@ public function testConstruct()
 
     /**
      * @expectedException PHPForm\Exceptions\ValidationError
-     * @expectedExceptionMessage The submitted file is empty.
+     * @expectedExceptionMessage This field is required.
      */
     public function testValidateEmpty()
     {
         $data = array('size' => 0);
-        $this->field->validate((object) $data);
+        $field = new FileField(["max_size" => 20, "required" => true]);
+        $field->validate((object) $data);
     }
 
     /**

tests/unit/Validators/FileTypeValidatorTest.php

@@ -11,7 +11,7 @@ class FileTypeValidatorTest extends TestCase
 
     public function setUp()
     {
-        $this->data = (object) array('type' => 'image/png');
+        $this->data = (object) array('size' => 10, 'type' => 'image/png');
     }
 
     public function testValidType()