Express 561 unit testing: this project has a very simple example of the error described in issue 561.

Dependencies

• mongodb running on localhost with no security (i.e. a "trusted" environment)
• express
• mongoose
• ejs
• npm (not REALLY necessary, but makes things a lot easier)

Building

To build (make sure NPM has write access, or adjust for sudo):

make

Use Instructions

First, insert an object into mongodb:

express-561-test insert

Then, start the server:

express-561-test crashserver

Then, visit localhost:3000. You should see the object(s) printed. Refresh the page. Express should crash with can't use mutable headers error.

To clear database, run:

express-561-test clear

To start a "nice" server that doesn't crash, run:

express-561-test niceserver

The Error

To check out the error, examine the getObjectsCrash and getObjectsNice functions. getObjectCrash closes the mongoose connection before calling render. getObjectNice does not close the connection.