namespace

demonamespace/src/Index/Ccc.php

+<?php
+namespace Admin\Demophpunit\Index;
+
+class Ccc{
+    function Ccc() {
+        print("Cccccc11111");
+    }
+}
\ No newline at end of file

demonamespace/tests/DemoTest.php

+<?php
+use PHPUnit\Framework\TestCase;
+use Admin\Demophpunit\Index\Ccc;
+use function PHPUnit\Framework\assertNull;
+class DemoTest extends TestCase
+{
+    public function testAaa(){
+        $cc=new Ccc();
+        $cc->Ccc();
+        // print("aaaaaa");
+        // print("??????");
+        // print("cccccc");
+        // phpinfo();
+        $this->assertEmpty("","???");
+        
+    }
+}

demonamespace/tests/testAa.php

+<?php

demophpunit/src/Demo/Demo.php → demophpunit/src/Demo/DemoAa.php

@@ -3,6 +3,6 @@ namespace Admin\Demophpunit\Demo;
 class DemoAa
 {
     public function Aaa() {
-        print("Aaa");
+        print("Aaaaaa");
     }
 }

demophpunit/src/Demo/DemoBb.php

+<?php
+namespace Admin\Demophpunit\Demo;
+class DemoBb{
+    function Bbb() {
+        print("Bbbbbbb");
+    }
+}
\ No newline at end of file

demophpunit/src/Index/Ccc.php

+<?php
+namespace Admin\Demophpunit\Index;
+
+class Ccc{
+    function Ccc() {
+        print("Cccccc22222");
+    }
+}
\ No newline at end of file

demophpunit/tests/DemoTest.php

 <?php
 use PHPUnit\Framework\TestCase;
-
+use Admin\Demophpunit\Demo\DemoAa;
+use Admin\Demophpunit\Demo\DemoBb;
+use Admin\Demophpunit\Index\Ccc;
 use function PHPUnit\Framework\assertNull;
 
 class DemoTest extends TestCase
 {
     public function testAaa(){
+        $aa=new DemoAa();
+        $aa->Aaa();
+        $bb=new DemoBb;
+        $bb->Bbb();
+        $cc=new Ccc();
+        $cc->Ccc();
         print("aaaaaa");
         print("??????");
         print("cccccc");