Refactor FetchTest and ResponseTest to improve structure and coverage

- Updated FetchTest to utilize Guzzle's MockHandler for better request simulation.
- Added tests for various HTTP methods, including GET, POST, PUT, DELETE, and PATCH.
- Implemented checks for handling query parameters, form parameters, and custom headers.
- Enhanced error handling tests for request exceptions and response validation.
- Refactored ResponseTest to use PHPUnit's TestCase for improved organization.
- Added comprehensive tests for JSON and XML decoding, status code checkers, and header accessors.
- Improved array access and blob handling in Response class tests.

Author: Jerome Thayananthajothy

src/Fetch/Http/ClientHandler.php

@@ -36,7 +36,7 @@ class ClientHandler implements ClientHandlerInterface
      * Default options for the request.
      */
     protected static array $defaultOptions = [
-        'method'  => 'GET',
+        'method' => 'GET',
         'headers' => [],
         'timeout' => self::DEFAULT_TIMEOUT,
     ];
@@ -186,14 +186,6 @@ protected function isRetryableError(RequestException $e): bool
                $e->getPrevious() instanceof \GuzzleHttp\Exception\ConnectException;
     }
 
-    /**
-     * Determine if an error is retryable.
-     */
-    protected function isRetryableError(RequestException $e): bool
-    {
-        return in_array($e->getCode(), [500, 502, 503, 504]);
-    }
-
     /**
      * Get the full URI for the request.
      */
@@ -209,7 +201,7 @@ protected function getFullUri(): string
                 $parsedUrl = parse_url($uri);
                 $separator = ! empty($parsedUrl['query']) ? '&' : '?';
 
-                return $uri . $separator . http_build_query($this->options['query']);
+                return $uri.$separator.http_build_query($this->options['query']);
             }
 
             return $uri;
@@ -225,13 +217,13 @@ protected function getFullUri(): string
             }
 
             // Concatenate base URI and URI ensuring no double slashes
-            $result = rtrim($baseUri, '/') . '/' . ltrim($uri, '/');
+            $result = rtrim($baseUri, '/').'/'.ltrim($uri, '/');
         }
 
         // If query parameters exist, append them to the URL
         if (! empty($this->options['query'])) {
             $separator = strpos($result, '?') !== false ? '&' : '?';
-            $result .= $separator . http_build_query($this->options['query']);
+            $result .= $separator.http_build_query($this->options['query']);
         }
 
         return $result;
@@ -291,6 +283,26 @@ public function baseUri(string $baseUri): self
         return $this;
     }
 
+    /**
+     * Set multiple options for the request.
+     */
+    public function withOptions(array $options): self
+    {
+        $this->options = array_merge($this->options, $options);
+
+        return $this;
+    }
+
+    /**
+     * Set a single option for the request.
+     */
+    public function withOption(string $key, mixed $value): self
+    {
+        $this->options[$key] = $value;
+
+        return $this;
+    }
+
     /**
      * Set the query parameters for the request.
      */
@@ -316,7 +328,7 @@ public function withMultipart(array $multipart): self
      */
     public function withToken(string $token): self
     {
-        $this->options['headers']['Authorization'] = 'Bearer ' . $token;
+        $this->options['headers']['Authorization'] = 'Bearer '.$token;
 
         return $this;
     }
@@ -633,8 +645,8 @@ public function hasOption(string $option): bool
     public function debug(): array
     {
         return [
-            'uri'     => $this->getFullUri(),
-            'method'  => $this->options['method'] ?? 'GET',
+            'uri' => $this->getFullUri(),
+            'method' => $this->options['method'] ?? 'GET',
             'headers' => $this->getHeaders(),
             'options' => array_diff_key($this->options, ['headers' => true]),
         ];