Add test for method transformEmptyValuesToNull

refs #2751

test/php/library/Icinga/Web/ConfigFormTest.php

@@ -0,0 +1,52 @@
+<?php
+/* Icinga Web 2 | (c) 2017 Icinga Development Team | GPLv2+ */
+
+namespace Tests\Icinga\Web;
+
+use Icinga\Forms\ConfigForm;
+use Icinga\Test\BaseTestCase;
+
+class ConfigFormTest extends BaseTestCase
+{
+    public function testWhetherTransformEmptyValuesToNullHandlesValuesCorrectly()
+    {
+        $values = array(
+            'value1' => '',
+            'value2' => 'this is a test',
+            'value3' => array(),
+            'value4' => array('Test1', 'Test2'),
+            'value5' => 0,
+            'value6' => 1
+            );
+        $values = ConfigForm::transformEmptyValuesToNull($values);
+
+        $this->assertNull(
+            $values['value1'],
+            'ConfigForm::transformEmptyValuesToNull does not handle empty strings correctly'
+        );
+        $this->assertEquals(
+            'this is a test',
+            $values['value2'],
+            'ConfigForm::transformEmptyValuesToNull does not handle strings correctly'
+        );
+        $this->assertNull(
+            $values['value3'],
+            'ConfigForm::transformEmptyValuesToNull does not handle empty arrays correctly'
+        );
+        $this->assertEquals(
+            'Test1',
+            $values['value4'][0],
+            'ConfigForm::transformEmptyValuesToNull does not handle arrays correctly'
+        );
+        $this->assertEquals(
+            0,
+            $values['value5'],
+            'ConfigForm::transformEmptyValuesToNull does not handle zeros correctly'
+        );
+        $this->assertEquals(
+            1,
+            $values['value6'],
+            'ConfigForm::transformEmptyValuesToNull does not handle numbers correctly'
+        );
+    }
+}