Merge pull request #56 from rgdevment/master

feat: add constraint for native enum

src/Constraint/NativeEnum.php

@@ -0,0 +1,28 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Linio\Component\Input\Constraint;
+
+class NativeEnum extends Constraint
+{
+    protected $enumClass;
+
+    public function __construct($enumClass)
+    {
+        $this->enumClass = $enumClass;
+
+        $this->setErrorMessage(
+            $errorMessage ?? 'Invalid option for a native PHP enum. Allowed options are: ' . json_encode($this->enumClass::cases())
+        );
+    }
+
+    public function validate($content): bool
+    {
+        if (!is_scalar($content)) {
+            return false;
+        }
+
+        return !($this->enumClass::tryFrom($content) === null);
+    }
+}

tests/Constraint/NativeEnumTest.php

@@ -0,0 +1,42 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Linio\Component\Input\Constraint;
+
+use Linio\Component\Input\TestCase;
+
+class NativeEnumTest extends TestCase
+{
+    public function testIsCheckingInvalidData(): void
+    {
+        $constraint = new NativeEnum(FakeEnum::class);
+        $this->assertFalse($constraint->validate('test'));
+        $this->assertFalse($constraint->validate('blah'));
+
+        $this->assertFalse($constraint->validate(['foo']));
+        $obj = new \stdClass();
+        $obj->var1 = 'foo';
+        $this->assertFalse($constraint->validate($obj));
+    }
+
+    public function testIsCheckingValidData(): void
+    {
+        $constraint = new NativeEnum(FakeEnum::class);
+        $this->assertTrue($constraint->validate('FOO'));
+        $this->assertTrue($constraint->validate('BAR'));
+    }
+
+    public function testIsGettingErrorMessage(): void
+    {
+        $constraint = new NativeEnum(FakeEnum::class);
+        $this->assertFalse($constraint->validate('test'));
+        $this->assertEquals('[["FOO","BAR"]] Invalid option for a native PHP enum. Allowed options are: ["FOO","BAR"]', $constraint->getErrorMessage('["FOO","BAR"]'));
+    }
+}
+
+enum FakeEnum: string
+{
+    case Foo = 'FOO';
+    case Bar = 'BAR';
+}