BUG: #2503 Fixes performReadonlyTransformation for OptionSetField

NEW: Adding unit test for performReadonlyTransformation #nd fixing OptionSetField #2503

BUG: Fixing undefined variables and function parameters for PerformReadonlyTransformation unit tests

NEW: Adding unit test to OptionsetField for read only fields

forms/OptionsetField.php

@@ -93,7 +93,7 @@ public function Field($properties = array()) {
 	public function performReadonlyTransformation() {
 		// Source and values are DataObject sets.
 		$field = $this->castedCopy('LookupField');
-		$field->setValue($this->getSource());
+		$field->setSource($this->getSource());
 		$field->setReadonly(true);
 
 		return $field;

tests/forms/OptionsetFieldTest.php

@@ -24,4 +24,14 @@ public function testSetDisabledItems() {
 			''
 		);
 	}
+
+	public function testReadonlyField() {
+		$sourceArray = array(0 => 'No', 1 => 'Yes');
+		$field = new OptionsetField('FeelingOk', 'are you feeling ok?', $sourceArray, 1);
+		$field->setEmptyString('(Select one)');
+		$field->setValue(1);
+		$readonlyField = $field->performReadonlyTransformation();
+		preg_match('/Yes/', $field->Field(), $matches);
+		$this->assertEquals($matches[0], 'Yes');
+	}
 }