refactor: use native format for stack/cause recursion

src/errors.ts

@@ -4,7 +4,7 @@
  * Licensed under the BSD 3-Clause license.
  * For full license text, see LICENSE.txt file in the repo root or https://opensource.org/licenses/BSD-3-Clause
  */
-
+import { format } from 'node:util';
 /**
  * Any `Error` compatible with the `NamedError` type signature.
  */
@@ -35,12 +35,7 @@ export class NamedError extends Error {
   }
 
   public get fullStack(): string | undefined {
-    let stack = this.stack;
-    const causedStack = this.cause instanceof NamedError ? this.cause?.fullStack ?? this.cause?.stack : undefined;
-    if (causedStack) {
-      stack = `${stack ? stack + '\n' : ''}Caused by: ${causedStack}`;
-    }
-    return stack;
+    return format(this);
   }
 }
 

test/errors.test.ts

@@ -20,16 +20,16 @@ describe('NamedError', () => {
     const three = new NamedError('ThreeError', two);
     three.stack = `${three.name}:\n    at test:3:1`;
 
-    expect(three.fullStack).to.equal(
-      `ThreeError:
-    at test:3:1
-Caused by: TwoError: message two
-    at test:2:1
-Caused by: OneError:
-    at test:1:1
-Caused by: Error: message zero
-    at test:0:1`
-    );
+    [
+      'NamedError [ThreeError]',
+      'at test:3:1',
+      'cause: NamedError [TwoError]: message two',
+      'at test:2:1',
+      'cause: NamedError [OneError]',
+      'at test:1:1',
+      'cause: Error: message zero',
+      'at test:0:1',
+    ].map((line) => expect(three.fullStack).to.contain(line));
   });
 });