Make errors serializable by default

Author: csidell-earny

packages/common/exceptions/http.exception.ts

@@ -30,4 +30,18 @@ export class HttpException extends Error {
   public getStatus(): number {
     return this.status;
   }
+
+  private getError(target) {
+    if(typeof target === 'string') {
+      return target;
+    }
+
+    return JSON.stringify(target);
+  }
+
+  public toString(): string {
+    const message = this.getError(this.message);
+
+    return `Error: ${message}`;
+  }
 }

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

@@ -44,4 +44,27 @@ describe('HttpException', () => {
       statusCode: 404,
     });
   });
+
+  it('Should inherit from error', () => {
+    const error = new HttpException('', 400);
+    expect(error instanceof Error).to.be.true;
+  });
+
+  it('Should be serializable', () => {
+    const message = 'Some Error';
+    const error = new HttpException(message, 400);
+    expect(`${error}`).to.be.eql(`Error: ${message}`);
+  });
+
+  it('Should serialize objects', () => {
+    const obj = { foo: 'bar' };
+    const error = new HttpException(obj, 400);
+    expect(`${error}`).to.be.eql(`Error: ${JSON.stringify(obj)}`);
+    expect(`${error}`.includes('[object Object]')).to.not.be.true;
+  });
+
+  it('Should serialize sub errors', () => {
+    const error = new NotFoundException();
+    expect(`${error}`.includes('Not Found')).to.be.true;
+  });
 });