Merge pull request #9705 from vinnymac/feature/error-chaining

feat(common): Add error chaining support to http exception

packages/common/exceptions/http.exception.ts

@@ -41,6 +41,22 @@ export class HttpException extends Error {
     super();
     this.initMessage();
     this.initName();
+    this.initCause();
+  }
+
+  public cause: Error | undefined;
+
+  /**
+   * Configures error chaining support
+   *
+   * See:
+   * - https://nodejs.org/en/blog/release/v16.9.0/#error-cause
+   * - https://github.com/microsoft/TypeScript/issues/45167
+   */
+  public initCause() {
+    if (this.response instanceof Error) {
+      this.cause = this.response;
+    }
   }
 
   public initMessage() {

packages/common/test/exceptions/http.exception.spec.ts

@@ -129,4 +129,15 @@ describe('HttpException', () => {
       });
     });
   });
+
+  describe('initCause', () => {
+    it('configures a cause when message is an instance of error', () => {
+      const message = new Error('Some Error');
+      const error = new HttpException(message, 400);
+      expect(`${error}`).to.be.eql(`HttpException: ${message.message}`);
+      const { cause } = error;
+
+      expect(cause).to.be.eql(message);
+    });
+  });
 });