diff --git a/src/Providers/HttpServiceProvider.php b/src/Providers/HttpServiceProvider.php
index 9d041d2..aed001a 100644
--- a/src/Providers/HttpServiceProvider.php
+++ b/src/Providers/HttpServiceProvider.php
@@ -23,5 +23,9 @@ class HttpServiceProvider implements ServiceProviderContract
         $kernel->bind('post',function (...$args){
             return HttpService::post($this,...$args);
         });
+
+        $kernel->bind('postJson',function (...$args){
+            return HttpService::postJson($this,...$args);
+        });
     }
 }
\ No newline at end of file
diff --git a/src/Providers/SystemServiceProvider.php b/src/Providers/SystemServiceProvider.php
index a31b802..e0299c4 100644
--- a/src/Providers/SystemServiceProvider.php
+++ b/src/Providers/SystemServiceProvider.php
@@ -24,5 +24,9 @@ class SystemServiceProvider implements ServiceProviderContract
             return $this->query()->getData($callback)->all();
         });
 
+        $kernel->bind('pipe',function (Closure $callback = null){
+            return $callback($this);
+        });
+
     }
 }
\ No newline at end of file
diff --git a/src/QueryList.php b/src/QueryList.php
index 5f7df09..5f3abeb 100644
--- a/src/QueryList.php
+++ b/src/QueryList.php
@@ -35,7 +35,9 @@ use Closure;
  * @method QueryList encoding(string $outputEncoding,string $inputEncoding = null)
  * @method QueryList get($url,$args = null,$otherArgs = [])
  * @method QueryList post($url,$args = null,$otherArgs = [])
+ * @method QueryList postJson($url,$args = null,$otherArgs = [])
  * @method QueryList use($plugins,...$opt)
+ * @method QueryList pipe(Closure $callback = null)
  */
 class QueryList
 {
diff --git a/src/Services/HttpService.php b/src/Services/HttpService.php
index 7461d8e..77993c2 100644
--- a/src/Services/HttpService.php
+++ b/src/Services/HttpService.php
@@ -45,4 +45,15 @@ class HttpService
         $ql->setHtml($html);
         return $ql;
     }
+
+    public static function postJson(QueryList $ql,$url,$args = null,$otherArgs = [])
+    {
+        $otherArgs = array_merge([
+            'cookies' => self::getCookieJar(),
+            'verify' => false
+        ],$otherArgs);
+        $html = GHttp::postJson($url,$args,$otherArgs);
+        $ql->setHtml($html);
+        return $ql;
+    }
 }
\ No newline at end of file
diff --git a/tests/Dom/FindTest.php b/tests/Dom/FindTest.php
new file mode 100644
index 0000000..acf5c84
--- /dev/null
+++ b/tests/Dom/FindTest.php
@@ -0,0 +1,71 @@
+<?php
+/**
+ * Created by PhpStorm.
+ * User: x
+ * Date: 2018/12/10
+ * Time: 12:46 AM
+ */
+
+namespace Tests\Dom;
+
+
+use QL\QueryList;
+use Tests\TestCaseBase;
+
+class FindTest extends TestCaseBase
+{
+    protected $html;
+    protected $ql;
+
+    public function setUp()
+    {
+        $this->html = $this->getSnippet('snippet-1');
+        $this->ql = QueryList::html($this->html);
+    }
+
+    /**
+     * @test
+     */
+    public function find_first_dom_attr()
+    {
+        $img = [];
+        $img[] = $this->ql->find('img')->attr('src');
+        $img[] = $this->ql->find('img')->src;
+        $img[] = $this->ql->find('img:eq(0)')->src;
+        $img[] = $this->ql->find('img')->eq(0)->src;
+
+        $alt = $this->ql->find('img')->alt;
+        $abc = $this->ql->find('img')->abc;
+
+        $this->assertCount(1,array_unique($img));
+        $this->assertEquals($alt,'这是图片');
+        $this->assertEquals($abc,'这是一个自定义属性');
+
+    }
+
+    /**
+     * @test
+     */
+    public function find_second_dom_attr()
+    {
+
+        $img2 = [];
+        $img2[] = $this->ql->find('img')->eq(1)->alt;
+        $img2[] = $this->ql->find('img:eq(1)')->alt;
+        $img2[] = $this->ql->find('.second_pic')->alt;
+
+        $this->assertCount(1,array_unique($img2));
+
+    }
+
+    /**
+     * @test
+     */
+    public function find_dom_all_attr()
+    {
+        $imgAttr = $this->ql->find('img:eq(0)')->attr('*');
+        $linkAttr = $this->ql->find('a:eq(1)')->attr('*');
+        $this->assertCount(3,$imgAttr);
+        $this->assertCount(1,$linkAttr);
+    }
+}
\ No newline at end of file
diff --git a/tests/Feature/HttpTest.php b/tests/Feature/HttpTest.php
new file mode 100644
index 0000000..6900eed
--- /dev/null
+++ b/tests/Feature/HttpTest.php
@@ -0,0 +1,33 @@
+<?php
+/**
+ * Created by PhpStorm.
+ * User: x
+ * Date: 2018/12/10
+ * Time: 12:35 AM
+ */
+
+namespace Tests\Feature;
+
+
+use GuzzleHttp\Handler\MockHandler;
+use GuzzleHttp\Psr7\Response;
+use QL\QueryList;
+use Tests\TestCaseBase;
+
+class HttpTest extends TestCaseBase
+{
+    /**
+     * @test
+     */
+    public function can_post_json_data()
+    {
+        $mock = new MockHandler([new Response()]);
+        $data = [
+            'name' => 'foo'
+        ];
+        QueryList::postJson('http://foo.com',$data,[
+            'handler' => $mock
+        ]);
+        $this->assertEquals((string)$mock->getLastRequest()->getBody(),json_encode($data));
+    }
+}
\ No newline at end of file
diff --git a/tests/Feature/MethodTest.php b/tests/Feature/MethodTest.php
new file mode 100644
index 0000000..684cbd0
--- /dev/null
+++ b/tests/Feature/MethodTest.php
@@ -0,0 +1,36 @@
+<?php
+/**
+ * Created by PhpStorm.
+ * User: x
+ * Date: 2018/12/10
+ * Time: 1:14 AM
+ */
+
+namespace Tests\Feature;
+
+
+use QL\QueryList;
+use Tests\TestCaseBase;
+
+class MethodTest extends TestCaseBase
+{
+    protected $html;
+
+    public function setUp()
+    {
+        $this->html = $this->getSnippet('snippet-1');
+    }
+
+    /**
+     * @test
+     */
+    public function pipe()
+    {
+        $html = $this->html;
+        $qlHtml = QueryList::pipe(function(QueryList $ql) use($html){
+            $ql->setHtml($html);
+            return $ql;
+        })->getHtml();
+        $this->assertEquals($html,$qlHtml);
+    }
+}
\ No newline at end of file