Add new class for request headers

src/RequestHeaders.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace Yiisoft\RequestProvider;
+
+use Psr\Http\Message\ServerRequestInterface;
+
+final class RequestHeaders {
+    private ServerRequestInterface $request;
+
+    /**
+     * @param RequestProviderInterface $requestProvider
+     */
+    public function __construct(
+        RequestProviderInterface $requestProvider
+    ) {
+        $this->request = $requestProvider->get();
+    }
+
+    /**
+     * @param string $name
+     * @return string|null
+     */
+    public function get(string $name): string|null {
+        return $this->request->hasHeader($name) ? $this->request->getHeaderLine($name) : null;
+    }
+
+    /**
+     * @param string $name
+     * @return bool
+     */
+    public function has(string $name): bool {
+        return $this->request->hasHeader($name);
+    }
+}

tests/RequestHeadersTest.php

@@ -0,0 +1,58 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Yiisoft\RequestProvider\Tests;
+
+use PHPUnit\Framework\MockObject\Exception;
+use PHPUnit\Framework\TestCase;
+use Psr\Http\Message\ServerRequestInterface;
+use Yiisoft\RequestProvider\RequestHeaders;
+use Yiisoft\RequestProvider\RequestProviderInterface;
+
+final class RequestHeadersTest extends TestCase {
+    private const HEADER_NAME = 'test';
+    private const HEADER_VALUE = 'value';
+
+    /**
+     * @return void
+     */
+    public function testGet(): void {
+        $requestHeaders = $this->createRequestHeaders([self::HEADER_NAME => [self::HEADER_VALUE]]);
+
+        $this->assertSame(self::HEADER_VALUE, $requestHeaders->get(self::HEADER_NAME));
+    }
+
+    /**
+     * @return void
+     */
+    public function testHas(): void {
+        $requestHeaders = $this->createRequestHeaders([self::HEADER_NAME => [self::HEADER_VALUE]]);
+
+        $this->assertTrue($requestHeaders->has(self::HEADER_NAME));
+        $this->assertFalse($requestHeaders->has('non-exist'));
+    }
+
+    /**
+     * @param array $headers
+     * @return RequestHeaders
+     * @throws Exception
+     */
+    private function createRequestHeaders(array $headers = []): RequestHeaders {
+        /** @var ServerRequestInterface $serverRequestMock */
+        $serverRequestMock = $this->createMock(ServerRequestInterface::class);
+        $serverRequestMock
+            ->method('getHeaderLine')
+            ->willReturnCallback(fn(string $name): string => $headers[$name][0] ?? null);
+
+        $serverRequestMock
+            ->method('hasHeader')
+            ->willReturnCallback(fn(string $name) => array_key_exists($name, $headers));
+
+        /** @var RequestProviderInterface $requestProvider */
+        $requestProvider = $this->createMock(RequestProviderInterface::class);
+        $requestProvider->method('get')->willReturn($serverRequestMock);
+
+        return new RequestHeaders($requestProvider);
+    }
+}