diff --git a/.gitignore b/.gitignore
index a725465..aa30d8b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
-vendor/
\ No newline at end of file
+vendor/
+.phpunit.result.cache
\ No newline at end of file
diff --git a/.idea/HDK-Core.iml b/.idea/HDK-Core.iml
index 56b900d..67b0141 100644
--- a/.idea/HDK-Core.iml
+++ b/.idea/HDK-Core.iml
@@ -4,7 +4,7 @@
     <content url="file://$MODULE_DIR$">
       <sourceFolder url="file://$MODULE_DIR$/spec" isTestSource="true" />
       <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" packagePrefix="Singularity\HDK\Core\" />
-      <sourceFolder url="file://$MODULE_DIR$/tests" isTestSource="true" packagePrefix="Singularity\HDK\Test\\Core\" />
+      <sourceFolder url="file://$MODULE_DIR$/tests" isTestSource="true" packagePrefix="Singularity\HDK\Test\Core\" />
       <excludeFolder url="file://$MODULE_DIR$/vendor/sebastian/recursion-context" />
       <excludeFolder url="file://$MODULE_DIR$/vendor/sebastian/lines-of-code" />
       <excludeFolder url="file://$MODULE_DIR$/vendor/sebastian/type" />
@@ -131,6 +131,11 @@
       <excludeFolder url="file://$MODULE_DIR$/vendor/sebastian/code-unit-reverse-lookup" />
       <excludeFolder url="file://$MODULE_DIR$/vendor/sebastian/diff" />
       <excludeFolder url="file://$MODULE_DIR$/vendor/swoole/ide-helper" />
+      <excludeFolder url="file://$MODULE_DIR$/vendor/pestphp/pest" />
+      <excludeFolder url="file://$MODULE_DIR$/vendor/pestphp/pest-plugin" />
+      <excludeFolder url="file://$MODULE_DIR$/vendor/filp/whoops" />
+      <excludeFolder url="file://$MODULE_DIR$/vendor/nunomaduro/collision" />
+      <excludeFolder url="file://$MODULE_DIR$/vendor/facade/ignition-contracts" />
     </content>
     <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
diff --git a/.idea/php.xml b/.idea/php.xml
index 966e066..c0eecbe 100644
--- a/.idea/php.xml
+++ b/.idea/php.xml
@@ -137,6 +137,11 @@
       <path value="$PROJECT_DIR$/vendor/sebastian/code-unit-reverse-lookup" />
       <path value="$PROJECT_DIR$/vendor/sebastian/diff" />
       <path value="$PROJECT_DIR$/vendor/swoole/ide-helper" />
+      <path value="$PROJECT_DIR$/vendor/pestphp/pest" />
+      <path value="$PROJECT_DIR$/vendor/pestphp/pest-plugin" />
+      <path value="$PROJECT_DIR$/vendor/filp/whoops" />
+      <path value="$PROJECT_DIR$/vendor/nunomaduro/collision" />
+      <path value="$PROJECT_DIR$/vendor/facade/ignition-contracts" />
     </include_path>
   </component>
   <component name="PhpProjectSharedConfiguration" php_language_level="8.0" />
diff --git a/phpunit.xml b/phpunit.xml
index d747ff4..df1e643 100644
--- a/phpunit.xml
+++ b/phpunit.xml
@@ -1,9 +1,10 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" bootstrap="vendor/autoload.php" backupGlobals="false" colors="true" xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.5/phpunit.xsd">
-  <coverage/>
-  <testsuites>
-    <testsuite name="Example">
-      <directory>./tests/Example/</directory>
-    </testsuite>
-  </testsuites>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" bootstrap="vendor/autoload.php"
+         colors="true" xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.5/phpunit.xsd">
+    <coverage/>
+    <testsuites>
+        <testsuite name="Unit">
+            <directory>./tests/Unit/</directory>
+        </testsuite>
+    </testsuites>
 </phpunit>
diff --git a/tests/ExampleTest.php b/tests/ExampleTest.php
new file mode 100644
index 0000000..61cd84c
--- /dev/null
+++ b/tests/ExampleTest.php
@@ -0,0 +1,5 @@
+<?php
+
+test('example', function () {
+    expect(true)->toBeTrue();
+});
diff --git a/tests/Pest.php b/tests/Pest.php
new file mode 100644
index 0000000..5949c61
--- /dev/null
+++ b/tests/Pest.php
@@ -0,0 +1,45 @@
+<?php
+
+/*
+|--------------------------------------------------------------------------
+| Test Case
+|--------------------------------------------------------------------------
+|
+| The closure you provide to your test functions is always bound to a specific PHPUnit test
+| case class. By default, that class is "PHPUnit\Framework\TestCase". Of course, you may
+| need to change it using the "uses()" function to bind a different classes or traits.
+|
+*/
+
+// uses(Tests\TestCase::class)->in('Feature');
+
+/*
+|--------------------------------------------------------------------------
+| Expectations
+|--------------------------------------------------------------------------
+|
+| When you're writing tests, you often need to check that values meet certain conditions. The
+| "expect()" function gives you access to a set of "expectations" methods that you can use
+| to assert different things. Of course, you may extend the Expectation API at any time.
+|
+*/
+
+expect()->extend('toBeOne', function () {
+    return $this->toBe(1);
+});
+
+/*
+|--------------------------------------------------------------------------
+| Functions
+|--------------------------------------------------------------------------
+|
+| While Pest is very powerful out-of-the-box, you may have some testing code specific to your
+| project that you don't want to repeat in every file. Here you can also expose helpers as
+| global functions to help you to reduce the number of lines of code in your test files.
+|
+*/
+
+function something()
+{
+    // ..
+}
diff --git a/tests/Unit/Base64WrapperTest.php b/tests/Unit/Base64WrapperTest.php
new file mode 100644
index 0000000..09ab878
--- /dev/null
+++ b/tests/Unit/Base64WrapperTest.php
@@ -0,0 +1,32 @@
+<?php
+/**
+ * Base64WrapperTest.php@HDK-Core
+ *
+ * @author 李东云 <Dongyun.Li@LuxCreo.Ai>
+ * Powered by PhpStorm
+ * Created on 2022/12/20
+ */
+
+namespace Singularity\HDK\Test\Core\Unit;
+
+use Singularity\HDK\Core\Service\Base64Wrapper;
+use PHPUnit\Framework\TestCase;
+
+it('assertions base64 wrapper ENCODE', function(string $source, string $expected) {
+    $encoded = (new Base64Wrapper())->encode($source);
+
+    expect($expected)->toBe($encoded);
+})->with([
+    ['abc==', 'abc'],
+    ['=ccc=', 'ccc'],
+    ['YWJ/+j', 'YWJ_-j']
+]);
+
+it('assertions base64 wrapper DECODE', function(string $source, string $expected) {
+    $decoded = (new Base64Wrapper())->decode($source);
+
+    expect($expected)->toBe($decoded);
+})->with([
+    ['abc', 'abc'],
+    ['YWJ_-j', 'YWJ/+j']
+]);