Fixed OpenAI tests

Author: intuibase

src/Instrumentation/OpenAIPHP/src/OpenAIPHPInstrumentation.php

@@ -74,6 +74,7 @@ public static function register(): void
 
     private static function hookApi(CachedInstrumentation $instrumentation, $class, string $resource, string $operation)
     {
+        /** @psalm-suppress UnusedFunctionCall */
         hook(
             $class,
             $operation,

src/Instrumentation/OpenAIPHP/tests/Integration/OpenAIPHPInstrumentationTest.php

@@ -52,7 +52,7 @@ public function tearDown(): void
 
     private function loadFile(string $file): string
     {
-        return file_get_contents(__DIR__ . '/../resources/' . $file . '.json');
+        return file_get_contents(__DIR__ . '/../resources/' . $file . '.json') ?: '';
     }
 
     private function createClient(string $fixture): Client
@@ -99,7 +99,7 @@ public function dataProvider(): array
     public function test_openai_operation($api, $operation, $args, $fixture, array $spanAttributes): void
     {
         $client = $this->createClient($fixture);
-        $response = $client->$api()->$operation(...$args);
+        $client->$api()->$operation(...$args);
 
         $this->assertCount(1, $this->storage);
 
@@ -127,7 +127,7 @@ public function test_will_set_status()
             ->make();
 
         try {
-            $response = $client->completions()->create([
+            $client->completions()->create([
                 'model' => 'gpt-3.5-turbo-instruct',
                 'prompt' => 'Say this is a test',
                 'max_tokens' => 7,