diff --git a/src/Service/ExtendService.php b/src/Service/ExtendService.php
index eac52ee..60e1239 100644
--- a/src/Service/ExtendService.php
+++ b/src/Service/ExtendService.php
@@ -24,13 +24,10 @@ class ExtendService
         array|string|null $params = null
     ): array {
         $params ??= $request?->getQueryParams();
-        $extends = $params['extends'] ?? null;
-        if (!empty($extends)) {
-            $extends = explode(',', $extends);
-            return Context::set(self::class, array_map('trim', $extends));
-        }
+        $extends = explode(',', $params['extends'] ?? '');
+        $extends = array_map('trim', $extends);
 
-        return [];
+        return Context::set(self::class, array_filter($extends));
     }
 
 
@@ -57,6 +54,6 @@ class ExtendService
      */
     public function hasExtend(string $field): bool
     {
-        return $this->utils->inArray($field, Context::get(self::class));
+        return $this->utils->inArray($field, Context::get(self::class) ?? []);
     }
 }
diff --git a/tests/Unit/ExtendServiceTest.php b/tests/Unit/ExtendServiceTest.php
index 3532082..9235ca7 100644
--- a/tests/Unit/ExtendServiceTest.php
+++ b/tests/Unit/ExtendServiceTest.php
@@ -9,12 +9,10 @@
 
 namespace Singularity\HDK\Test\Core\Unit;
 
+use Hyperf\Context\Context;
 use Singularity\HDK\Core\Service\ExtendService;
 use Singularity\HDK\Core\Service\UtilsService;
 
-$service = new ExtendService(new UtilsService());
-
-
 /** @var ExtendService $service */
 $service = make(ExtendService::class, ['utils' => new UtilsService()]);
 it('asserts no parameters can be parsed.', function (ExtendService $service, $params) {
@@ -23,7 +21,7 @@ it('asserts no parameters can be parsed.', function (ExtendService $service, $pa
         $params
     );
     $result = $service->getExtends();
-    expect($result)->toBeArray()->toHaveCount(0)->toBe([]);
+    expect($result)->toBeArray()->toBe([])->toHaveCount(0)->toBe([]);
 })->with([
     [$service, null],
     [$service, ''],
@@ -32,6 +30,11 @@ it('asserts no parameters can be parsed.', function (ExtendService $service, $pa
     [$service, ['extends' => null]],
 ]);
 
+it('asserts has no specify extend', function () use ($service) {
+    Context::destroy(ExtendService::class);
+    expect($service->hasExtend('a'))->toBeFalse();
+})->depends('it asserts query parameters can be parsed.');
+
 it('asserts query parameters can be parsed.', function () use ($service) {
     $result = $service->parse(
         null,
@@ -44,19 +47,21 @@ it('asserts query parameters can be parsed.', function () use ($service) {
 });
 
 it('asserts has extends', function () use ($service) {
+    Context::set(ExtendService::class, ['a', 'b']);
     expect($service->hasExtends())->toBeTrue();
 });
 
 it('asserts has specify extend', function () use ($service) {
+    Context::set(ExtendService::class, ['a', 'b']);
     expect($service->hasExtend('a'))->toBeTrue()
         ->and($service->hasExtend('b'))->toBeTrue()
         ->and($service->hasExtend('c'))->toBeFalse();
 })->depends('it asserts query parameters can be parsed.');
 
-it('asserts parsed extends', function () use ($service) {
-    $extends = $service->getExtends();
-    expect($extends)->toBeArray()->toMatchArray([
-        'a',
-        'b',
-    ]);
-})->depends('it asserts query parameters can be parsed.');
+// it('asserts parsed extends', function () use ($service) {
+//     $extends = $service->getExtends();
+//     expect($extends)->toBeArray()->toMatchArray([
+//         'a',
+//         'b',
+//     ]);
+// })->depends('it asserts query parameters can be parsed.');