Add test case for headers with different cases

Author: gehrisandro

src/Responses/Meta/MetaInformation.php

@@ -29,6 +29,7 @@ private function __construct(
     public static function from(array $headers): self
     {
         $headers = array_change_key_case($headers, CASE_LOWER);
+
         $requestId = $headers['x-request-id'][0] ?? null;
 
         $openai = MetaInformationOpenAI::from([

tests/Fixtures/Meta.php

@@ -30,6 +30,17 @@ function metaHeadersFromAzure(): array
     ];
 }
 
+function metaHeadersWithDifferentCases(): array
+{
+    return [
+        'Openai-Model' => ['gpt-3.5-turbo-instruct'],
+        'OPENAI-ORGANIZATION' => ['org-1234'],
+        'openai-processing-ms' => [410],
+        'openai-version' => ['2020-10-01'],
+        'x-request-id' => ['3813fa4fa3f17bdf0d7654f0f49ebab4'],
+    ];
+}
+
 function meta(): MetaInformation
 {
     return MetaInformation::from(metaHeaders());

tests/Responses/Meta/MetaInformation.php

@@ -82,6 +82,21 @@
         ->openai->processingMs->toBeNull();
 });
 
+test('from response headers in different cases', function () {
+    $meta = MetaInformation::from((new \GuzzleHttp\Psr7\Response(headers: metaHeadersWithDifferentCases()))->getHeaders());
+
+    expect($meta)
+        ->toBeInstanceOf(MetaInformation::class)
+        ->requestId->toBe('3813fa4fa3f17bdf0d7654f0f49ebab4')
+        ->openai->toBeInstanceOf(MetaInformationOpenAI::class)
+        ->openai->model->toBe('gpt-3.5-turbo-instruct')
+        ->openai->organization->toBe('org-1234')
+        ->openai->version->toBe('2020-10-01')
+        ->openai->processingMs->toBe(410)
+        ->requestLimit->toBeNull()
+        ->tokenLimit->toBeNull();
+});
+
 test('as array accessible', function () {
     $meta = MetaInformation::from(metaHeaders());