Add test for checkbox field default values (wintercms#1119)

modules/backend/tests/formwidgets/CheckboxTest.php

@@ -0,0 +1,52 @@
+<?php
+
+namespace Backend\Tests\FormWidgets;
+
+use Backend\Widgets\Form;
+use Winter\Storm\Database\Model;
+use System\Tests\Bootstrap\PluginTestCase;
+
+class CheckboxTest extends PluginTestCase
+{
+    public $form = null;
+
+    public function setUp(): void
+    {
+        parent::setUp();
+
+        $this->form = new Form(null, [
+            'model' => new Model,
+            'arrayName' => 'array',
+            'fields' => [
+                'unchecked' => [
+                    'type' => 'checkbox',
+                    'label' => 'My Test Checkbox unchecked',
+                ],
+                'checkedForced' => [
+                    'type' => 'checkbox',
+                    'label' => 'My Test Checkbox checked',
+                    'default' => true,
+                ],
+                'uncheckedForced' => [
+                    'type' => 'checkbox',
+                    'label' => 'My Test Checkbox unchecked',
+                    'default' => false,
+                ],
+            ],
+        ]);
+
+        $this->form->render();
+    }
+
+    public function testConfigDefaultValue()
+    {
+        $unchecked = $this->form->getField('unchecked');
+        $this->assertFalse($unchecked->isSelected());
+
+        $checkedForced = $this->form->getField('checkedForced');
+        $this->assertTrue($checkedForced->isSelected());
+
+        $uncheckedForced = $this->form->getField('uncheckedForced');
+        $this->assertFalse($uncheckedForced->isSelected());
+    }
+}