Added tests. Fixed issues from test.

composer.json

@@ -14,9 +14,9 @@
   },
   "require-dev": {
     "laminas/laminas-coding-standard": "^3.1",
-    "phpunit/phpunit": "^12.5",
+    "phpunit/phpunit": "^12.5.22",
     "psalm/plugin-phpunit": "^0.19.5",
-    "vimeo/psalm": "^6.14"
+    "vimeo/psalm": "^6.16"
   },
   "autoload": {
     "psr-4": {

psalm.baseline.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<files psalm-version="6.14.3@d0b040a91f280f071c1abcb1b77ce3822058725a">
+<files psalm-version="6.16.1@f1f5de594dc76faf8784e02d3dc4716c91c6f6ac">
   <file src="src/ApiProblem.php">
     <MixedAssignment>
       <code><![CDATA[$prop]]></code>
@@ -10,10 +10,6 @@
     <PossiblyInvalidPropertyAssignmentValue>
       <code><![CDATA[$additional]]></code>
     </PossiblyInvalidPropertyAssignmentValue>
-    <PossiblyUnusedMethod>
-      <code><![CDATA[__get]]></code>
-      <code><![CDATA[setDetailIncludesStackTrace]]></code>
-    </PossiblyUnusedMethod>
   </file>
   <file src="src/ApiProblemResponse.php">
     <FalsableReturnStatement>
@@ -25,8 +21,10 @@
     <PossiblyFalseArgument>
       <code><![CDATA[$json]]></code>
     </PossiblyFalseArgument>
-    <UnusedClass>
-      <code><![CDATA[ApiProblemResponse]]></code>
-    </UnusedClass>
+  </file>
+  <file src="test/ApiProblemTest.php">
+    <UnusedVariable>
+      <code><![CDATA[$a]]></code>
+    </UnusedVariable>
   </file>
 </files>

src/ApiProblem.php

@@ -271,9 +271,6 @@ protected function getTitle(): ?string
             return get_class($this->detail);
         }
 
-        if (null === $this->title) {
-            return 'Unknown';
-        }
         return 'Unknown';
     }
 

src/ApiProblemResponse.php

@@ -18,6 +18,7 @@
 use const JSON_HEX_APOS;
 use const JSON_HEX_QUOT;
 use const JSON_HEX_TAG;
+use const JSON_PARTIAL_OUTPUT_ON_ERROR;
 use const JSON_THROW_ON_ERROR;
 use const JSON_UNESCAPED_SLASHES;
 
@@ -32,7 +33,8 @@ final class ApiProblemResponse extends Response
     | JSON_HEX_APOS
     | JSON_HEX_AMP
     | JSON_HEX_QUOT
-    | JSON_UNESCAPED_SLASHES;
+    | JSON_UNESCAPED_SLASHES
+    | JSON_PARTIAL_OUTPUT_ON_ERROR;
 
     public function __construct(ApiProblem $apiProblem)
     {

src/Exception/DomainException.php

@@ -0,0 +1,53 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Lmc\Api\Problem\Exception;
+
+use Override;
+use Traversable;
+
+final class DomainException extends \DomainException implements ExceptionInterface, ProblemExceptionInterface
+{
+    protected ?string $type = null;
+
+    protected array $details = [];
+
+    protected ?string $title = null;
+
+    public function setAdditionalDetails(array $details): self
+    {
+        $this->details = $details;
+        return $this;
+    }
+
+    public function setType(string $uri): self
+    {
+        $this->type = $uri;
+        return $this;
+    }
+
+    public function setTitle(string $title): self
+    {
+        $this->title = $title;
+        return $this;
+    }
+
+    #[Override]
+    public function getAdditionalDetails(): Traversable|array|null
+    {
+        return $this->details;
+    }
+
+    #[Override]
+    public function getType(): ?string
+    {
+        return $this->type;
+    }
+
+    #[Override]
+    public function getTitle(): ?string
+    {
+        return $this->title;
+    }
+}

src/Exception/ProblemExceptionInterface.php

@@ -13,7 +13,7 @@ interface ProblemExceptionInterface
 {
     public function getAdditionalDetails(): Traversable|array|null;
 
-    public function getType(): string;
+    public function getType(): ?string;
 
-    public function getTitle(): string;
+    public function getTitle(): ?string;
 }

test/ApiProblemResponseTest.php

@@ -0,0 +1,64 @@
+<?php
+
+declare(strict_types=1);
+
+namespace LmcTest\Api\Problem;
+
+use Lmc\Api\Problem\ApiProblem;
+use Lmc\Api\Problem\ApiProblemResponse;
+use Lmc\Api\Problem\Exception;
+use PHPUnit\Framework\TestCase;
+
+use function fopen;
+use function json_decode;
+use function strtolower;
+
+final class ApiProblemResponseTest extends TestCase
+{
+    public function testApiProblemResponseSetsStatusCodeAndReasonPhrase(): void
+    {
+        $response = new ApiProblemResponse(new ApiProblem(400, 'Random error'));
+        $this->assertEquals(400, $response->getStatusCode());
+        $this->assertIsString($response->getReasonPhrase());
+        $this->assertNotEmpty($response->getReasonPhrase());
+        $this->assertEquals('bad request', strtolower($response->getReasonPhrase()));
+    }
+
+    public function testApiProblemResponseSetsStatusCodeAndReasonPhraseUsingException(): void
+    {
+        $exception = new Exception\DomainException('Random error', 400);
+        $response  = new ApiProblemResponse(new ApiProblem(400, $exception));
+        $this->assertEquals(400, $response->getStatusCode());
+        $this->assertIsString($response->getReasonPhrase());
+        $this->assertNotEmpty($response->getReasonPhrase());
+        $this->assertEquals('bad request', strtolower($response->getReasonPhrase()));
+    }
+
+    public function testApiProblemResponseBodyIsSerializedApiProblem(): void
+    {
+        $additional = [
+            'foo' => fopen('php://memory', 'r'),
+        ];
+
+        $expected = [
+            'foo'    => null,
+            'type'   => 'http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html',
+            'title'  => 'Bad Request',
+            'status' => 400,
+            'detail' => 'Random error',
+        ];
+
+        $apiProblem = new ApiProblem(400, 'Random error', null, null, $additional);
+        $response   = new ApiProblemResponse($apiProblem);
+        $this->assertEquals($expected, json_decode($response->getBody()->getContents(), true));
+    }
+
+    public function testApiProblemResponseSetsContentTypeHeader(): void
+    {
+        $response = new ApiProblemResponse(new ApiProblem(400, 'Random error'));
+        $headers  = $response->getHeaders();
+        $this->assertArrayHasKey('content-type', $headers);
+        $header = $headers['content-type'][0];
+        $this->assertEquals(ApiProblem::CONTENT_TYPE, $header);
+    }
+}