Added Checked validation

src/Http/Validation/Rules/Checked.php

@@ -0,0 +1,13 @@
+<?php
+
+namespace Engelsystem\Http\Validation\Rules;
+
+use Respect\Validation\Rules\AbstractRule;
+
+class Checked extends AbstractRule
+{
+    public function validate($input)
+    {
+        return in_array($input, ['yes', 'on', 1, '1', 'true', true], true);
+    }
+}

tests/Unit/Http/Validation/Rules/CheckedTest.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace Engelsystem\Test\Unit\Http\Validation\Rules;
+
+use Engelsystem\Http\Validation\Rules\Checked;
+use Engelsystem\Test\Unit\TestCase;
+
+class CheckedTest extends TestCase
+{
+    /**
+     * @covers \Engelsystem\Http\Validation\Rules\Checked::validate
+     */
+    public function testValidate()
+    {
+        $rule = new Checked();
+
+        $this->assertTrue($rule->validate('yes'));
+        $this->assertTrue($rule->validate('on'));
+        $this->assertTrue($rule->validate(1));
+        $this->assertTrue($rule->validate('1'));
+        $this->assertTrue($rule->validate('true'));
+        $this->assertTrue($rule->validate(true));
+
+        $this->assertFalse($rule->validate('no'));
+        $this->assertFalse($rule->validate('off'));
+        $this->assertFalse($rule->validate(0));
+        $this->assertFalse($rule->validate('0'));
+        $this->assertFalse($rule->validate('false'));
+        $this->assertFalse($rule->validate(false));
+        $this->assertFalse($rule->validate(null));
+    }
+}