Add tests for Deprecated attribute

Author: razvbir

tests/Attribute/DeprecatedTest.php

@@ -0,0 +1,98 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Yiisoft\Html\Tests\Attribute;
+
+use PHPUnit\Framework\TestCase;
+use Yiisoft\Html\Attribute\Deprecated;
+
+final class DeprecatedTest extends TestCase
+{
+    private function make(?string $message, ?string $since): Deprecated
+    {
+        $errors = [];
+        set_error_handler(static function (int $errno, string $errstr) use (&$errors): bool {
+            $errors[] = $errstr;
+            return true;
+        }, E_USER_DEPRECATED);
+
+        $attribute = new Deprecated($message, $since);
+
+        restore_error_handler();
+
+        return $attribute;
+    }
+
+    public function testMessageProperty(): void
+    {
+        $attribute = $this->make('Test message', null);
+
+        $this->assertSame('Test message', $attribute->message);
+    }
+
+    public function testSinceProperty(): void
+    {
+        $attribute = $this->make('Test message', '1.0.0');
+
+        $this->assertSame('1.0.0', $attribute->since);
+    }
+
+    public function testNullMessageProperty(): void
+    {
+        $attribute = $this->make(null, null);
+
+        $this->assertNull($attribute->message);
+    }
+
+    public function testNullSinceProperty(): void
+    {
+        $attribute = $this->make('Test message', null);
+
+        $this->assertNull($attribute->since);
+    }
+
+    public function testTriggersDeprecationError(): void
+    {
+        $triggered = false;
+        $triggeredMessage = null;
+
+        set_error_handler(static function (int $errno, string $errstr) use (&$triggered, &$triggeredMessage): bool {
+            $triggered = true;
+            $triggeredMessage = $errstr;
+            return true;
+        }, E_USER_DEPRECATED);
+
+        new Deprecated('Use something else.', null);
+
+        restore_error_handler();
+
+        $this->assertTrue($triggered);
+        $this->assertSame('Use something else.', $triggeredMessage);
+    }
+
+    public function testNullMessageTriggersEmptyError(): void
+    {
+        $triggeredMessage = null;
+
+        set_error_handler(static function (int $errno, string $errstr) use (&$triggeredMessage): bool {
+            $triggeredMessage = $errstr;
+            return true;
+        }, E_USER_DEPRECATED);
+
+        new Deprecated(null, null);
+
+        restore_error_handler();
+
+        $this->assertSame('', $triggeredMessage);
+    }
+
+    public function testClassAlias(): void
+    {
+        $this->assertTrue(class_exists('Deprecated'));
+
+        $attribute = $this->make('Test message', null);
+
+        $this->assertInstanceOf(Deprecated::class, $attribute);
+    }
+}