diff --git a/composer.json b/composer.json
index c14f601..d5e2232 100644
--- a/composer.json
+++ b/composer.json
@@ -24,7 +24,13 @@
             "QL\\":"src"
         }
     },
+    "autoload-dev": {
+        "psr-4": {
+            "Tests\\": "tests/"
+        }
+    },
     "require-dev": {
-        "symfony/var-dumper": "^3.3"
+        "symfony/var-dumper": "^3.3",
+        "phpunit/phpunit": "^7.5"
     }
 }
diff --git a/phpunit.xml b/phpunit.xml
new file mode 100644
index 0000000..ba72a84
--- /dev/null
+++ b/phpunit.xml
@@ -0,0 +1,19 @@
+<phpunit
+        bootstrap="vendor/autoload.php"
+        convertErrorsToExceptions="true"
+        convertNoticesToExceptions="true"
+        convertWarningsToExceptions="true"
+>
+    <testsuites>
+        <testsuite name="querylist">
+            <directory>./tests</directory>
+        </testsuite>
+    </testsuites>
+
+    <filter>
+        <whitelist>
+            <directory suffix=".php">src</directory>
+        </whitelist>
+    </filter>
+
+</phpunit>
\ No newline at end of file
diff --git a/tests/Feature/InstanceTest.php b/tests/Feature/InstanceTest.php
new file mode 100644
index 0000000..58c268d
--- /dev/null
+++ b/tests/Feature/InstanceTest.php
@@ -0,0 +1,48 @@
+<?php
+/**
+ * Created by PhpStorm.
+ * User: x
+ * Date: 2018/12/9
+ * Time: 11:10 PM
+ */
+
+namespace Tests\Feature;
+
+
+use QL\QueryList;
+use Tests\TestCaseBase;
+
+class InstanceTest extends TestCaseBase
+{
+    protected $html;
+
+    public function setUp()
+    {
+        $this->html = $this->getSnippet('snippet-1');
+    }
+    /**
+     * @test
+     */
+    public function singleton_instance_mode()
+    {
+        $ql = QueryList::getInstance()->html($this->html);
+        $ql2 = QueryList::getInstance();
+        $this->assertEquals($ql->getHtml(),$ql2->getHtml());
+
+
+    }
+
+    /**
+     * @test
+     */
+    public function get_new_object()
+    {
+        $ql = (new QueryList())->html($this->html);
+        $ql2 = new QueryList();
+        $this->assertNotEquals($ql->getHtml(),$ql2->getHtml());
+
+        $ql = QueryList::range('')->html($this->html);
+        $ql2 = QueryList::range('');
+        $this->assertNotEquals($ql->getHtml(),$ql2->getHtml());
+    }
+}
\ No newline at end of file
diff --git a/tests/TestCaseBase.php b/tests/TestCaseBase.php
new file mode 100644
index 0000000..c88d73e
--- /dev/null
+++ b/tests/TestCaseBase.php
@@ -0,0 +1,20 @@
+<?php
+/**
+ * Created by PhpStorm.
+ * User: x
+ * Date: 2018/12/9
+ * Time: 11:43 PM
+ */
+
+namespace Tests;
+
+
+use PHPUnit\Framework\TestCase;
+
+class TestCaseBase extends TestCase
+{
+    public function getSnippet($name)
+    {
+        return file_get_contents(__DIR__.'/assets/'.$name.'.html');
+    }
+}
\ No newline at end of file
diff --git a/tests/assets/snippet-1.html b/tests/assets/snippet-1.html
new file mode 100644
index 0000000..1f61fb1
--- /dev/null
+++ b/tests/assets/snippet-1.html
@@ -0,0 +1,9 @@
+<div id="one">
+    <div class="two">
+        <a href="http://querylist.cc">QueryList官网</a>
+        <img src="http://querylist.com/1.jpg" alt="这是图片" abc="这是一个自定义属性">
+        <img class="second_pic" src="http://querylist.com/2.jpg" alt="这是图片2">
+        <a href="http://doc.querylist.cc">QueryList文档</a>
+    </div>
+    <span>其它的<b>一些</b>文本</span>
+</div>
\ No newline at end of file
diff --git a/tests/bootstrap.php b/tests/bootstrap.php
new file mode 100644
index 0000000..eace7af
--- /dev/null
+++ b/tests/bootstrap.php
@@ -0,0 +1,5 @@
+<?php
+
+set_time_limit(0);
+
+require __DIR__.'/../vendor/autoload.php';
\ No newline at end of file