Add boolean rule

Author: gdarko

src/Rules/Boolean.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace IgniteKit\Validation\Rules;
+
+use IgniteKit\Validation\Rule;
+
+class Boolean extends Rule
+{
+    /**
+     * @var string
+     */
+    protected $message = "The :attribute must be a boolean";
+
+    /**
+     * Check the value is valid
+     *
+     * @param mixed $value
+     * @return bool
+     * @throws \Exception
+     */
+    public function check($value): bool
+    {
+        return \in_array($value, [\true, \false, "true", "false", 1, 0, "0", "1", "y", "n"], \true);
+    }
+}

src/Validator.php

@@ -138,6 +138,7 @@ protected function registerBaseValidators()
             'between'                   => new Rules\Between,
             'url'                       => new Rules\Url,
             'integer'                   => new Rules\Integer,
+            'boolean'                   => new Rules\Boolean,
             'ip'                        => new Rules\Ip,
             'ipv4'                      => new Rules\Ipv4,
             'ipv6'                      => new Rules\Ipv6,

tests/Rules/BooleanTest.php

@@ -0,0 +1,37 @@
+<?php
+
+namespace IgniteKit\Validation\Tests;
+
+use IgniteKit\Validation\Rules\Boolean;
+use PHPUnit\Framework\TestCase;
+
+class BooleanTest extends TestCase
+{
+    public function setUp():void
+    {
+        $this->rule = new Boolean;
+    }
+
+    public function testValids()
+    {
+        $this->assertTrue($this->rule->check(\true));
+        $this->assertTrue($this->rule->check(\false));
+        $this->assertTrue($this->rule->check(1));
+        $this->assertTrue($this->rule->check(0));
+        $this->assertTrue($this->rule->check('1'));
+        $this->assertTrue($this->rule->check('0'));
+        $this->assertTrue($this->rule->check('y'));
+        $this->assertTrue($this->rule->check('n'));
+    }
+
+    public function testInvalids()
+    {
+        $this->assertFalse($this->rule->check(11));
+        $this->assertFalse($this->rule->check([]));
+        $this->assertFalse($this->rule->check('foo123'));
+        $this->assertFalse($this->rule->check('123foo'));
+        $this->assertFalse($this->rule->check([123]));
+        $this->assertFalse($this->rule->check('123.456'));
+        $this->assertFalse($this->rule->check('-123.456'));
+    }
+}