test: add test for maskSensitiveData() and trace data key

Author: kenjis

tests/system/Debug/ExceptionsTest.php

@@ -196,4 +196,36 @@ public function testMaskSensitiveData(): void
         $this->assertSame(['password' => '******************'], $newTrace[0]['args'][2]);
         $this->assertSame(['password' => '******************'], $newTrace[0]['args'][3]['default']);
     }
+
+    public function testMaskSensitiveDataTraceDataKey(): void
+    {
+        $maskSensitiveData = $this->getPrivateMethodInvoker($this->exception, 'maskSensitiveData');
+
+        $trace = [
+            0 => [
+                'file'     => '/var/www/CodeIgniter4/app/Controllers/Home.php',
+                'line'     => 15,
+                'function' => 'f',
+                'class'    => 'App\\Controllers\\Home',
+                'type'     => '->',
+                'args'     => [
+                ],
+            ],
+            1 => [
+                'file'     => '/var/www/CodeIgniter4/system/CodeIgniter.php',
+                'line'     => 932,
+                'function' => 'index',
+                'class'    => 'App\\Controllers\\Home',
+                'type'     => '->',
+                'args'     => [
+                ],
+            ],
+        ];
+        $keysToMask = ['file'];
+        $path       = '';
+
+        $newTrace = $maskSensitiveData($trace, $keysToMask, $path);
+
+        $this->assertSame('/var/www/CodeIgniter4/app/Controllers/Home.php', $newTrace[0]['file']);
+    }
 }