koa-lite/test/application/onerror.js

'use strict';

const stderr = require('test-console').stderr;
const Koa = require('../..');
const AssertionError = require('assert').AssertionError;

describe('app.onerror(err)', function(){
  it('should throw an error if a non-error is given', function(done){
    const app = new Koa();

    try {
      app.onerror('foo');

      should.fail();
    } catch (err) {
      err.should.be.instanceOf(AssertionError);
      err.message.should.equal('non-error thrown: foo');
    }

    done();
  })

  it('should do nothing if status is 404', function(done){
    const app = new Koa();
    const err = new Error();

    err.status = 404;

    const output = stderr.inspectSync(function() {
      app.onerror(err);
    });

    output.should.eql([]);

    done();
  })

  it('should do nothing if .silent', function(done){
    const app = new Koa();
    app.silent = true;
    const err = new Error();

    const output = stderr.inspectSync(function() {
      app.onerror(err);
    });

    output.should.eql([]);

    done();
  })

  it('should log the error to stderr', function(done){
    const app = new Koa();
    app.env = 'dev';

    const err = new Error();
    err.stack = 'Foo';

    const output = stderr.inspectSync(function() {
      app.onerror(err);
    });

    output.should.eql(["\n", "  Foo\n", "\n"]);

    done();
  })

  it('should use err.toString() instad of err.stack', function(done){
    const app = new Koa();
    app.env = 'dev';

    const err = new Error('mock stack null');
    err.stack = null;

    const output = stderr.inspectSync(function() {
      app.onerror(err);
    });

    output.should.eql(["\n", "  Error: mock stack null\n", "\n"]);

    done();
  })
})