Error in test-mode on 1.3 (TypeError: Cannot read property 'Stream' of undefined)

help
1

I am using the aws-sdk in the meteor-app and that is working without any problems.

When I start the new test-mode from Meteor 1.3.2.2 I get an Error directly.

I am basically only initializing the s3 object and that already breaks it.

import { AWS } from 'aws-sdk';

let s3 = new AWS.S3({
  signatureVersion: 'v4'
});

Seeing the following Error:

/Users/manuelschoebel/.meteor/packages/meteor-tool/.1.3.2_2.1rvzhiz++os.osx.x86_64+web.browser+web.cordova/mt-os.osx.x86_64/dev_bundle/server-lib/node_modules/fibers/future.js:267
						throw(ex);
						      ^

TypeError: Cannot read property 'Stream' of undefined
   at Object.<anonymous> (.../meteorTestModeIssueWithAWSSdk/node_modules/aws-sdk/lib/http/node.js:2:44)
   at Module._compile (module.js:456:26)
   at Object.Module._extensions..js (module.js:474:10)
   at Module.load (module.js:356:32)
   at Function.Module._load (module.js:312:12)
   at Module.require (module.js:364:17)
   at require (module.js:380:17)
   at Object.<anonymous> (.../meteorTestModeIssueWithAWSSdk/node_modules/aws-sdk/lib/aws.js:11:1)
   at Module._compile (module.js:456:26)
   at Object.Module._extensions..js (module.js:474:10)

To recreate the issue see following repo:

Does anyone have an idea? Are there some modules somehow disabled while in testing mode or s.th.?

2 Likes
2

I figured that in development mode process.browser is undefined in the server scope. However in test-mode process.browser is true even though I am in the server scope e.g. Meteor.isServer is true.

3

I have the exact same issue. I’m using CollectionFS with the S3 adapter. The app runs perfectly in normal mode but in test mode, with or without --full-app the app will not boot and I get the following error:

TypeError: Cannot read property 'Stream' of undefined
    at Object.<anonymous> (/Users/tim/.meteor/packages/cfs_s3/.0.1.3.1wrcab9++os+web.browser+web.cordova/npm/node_modules/aws-sdk/lib/http/node.js:2:44)
    at Module._compile (module.js:456:26)
    at Object.Module._extensions..js (module.js:474:10)
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:312:12)
    at Module.require (module.js:364:17)
    at require (module.js:380:17)
    at Object.<anonymous> (/Users/tim/.meteor/packages/cfs_s3/.0.1.3.1wrcab9++os+web.browser+web.cordova/npm/node_modules/aws-sdk/lib/aws.js:11:1)
    at Module._compile (module.js:456:26)
    at Object.Module._extensions..js (module.js:474:10)
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:312:12)
    at Module.require (module.js:364:17)
    at require (module.js:380:17)
    at Object.Npm.require (/private/var/folders/_t/mf0yc4h973vd1_z0nr6r49840000gn/T/meteor-test-runvn4krt/.meteor/local/build/programs/server/boot.js:182:18)
    at Writable (packages/cfs_s3/packages/cfs_s3.js:10:1)
4

I figured that there is a process.browser = true somewhere very deep within a dependency of /usr/USER_NAME/.meteor/packages/babel-runtime package of the global meteor installation. Two files are doing it acorn_csp.js and acorn.js.

I guess somehow meteor test starts the application in a way that makes the library think it is in client-mode or something… It is a bit strange but should be investigated since I guess it will break every lib that checks on process.browser.

Unfortunately I did not yet come up with a workaround since you cannot simply process.browser = false before you require the lib :wink:

5

I’m having the same issue as well. Am using aws-sdk and getting TypeError: Cannot read property 'Stream' of undefined when running meteor in test mode. Normally my app runs with no problems. My meteor version is 1.3.2.4.

6

Bumping this. Having the same issue as well on aws-sdk. Only when running test this happens. If anyone has any ideas, please paste here. I have not been able to find a work around for this as of yet

7

I’m also seeing this. As a workaround, i’m doing this:

let AWSSDK;
if (!(Meteor.isAppTest || Meteor.isTest)) {
    AWSSDK = require("aws-sdk");
}
else {
    console.warn("Not loading aws-sdk; it's incompatible with test mode.");
    /* could also do AWSSDK = { ... some test stub ... }; */
}
8

Has anyone found a solution to this? In Meteor 1.2, I wrote a local-only package for an AWS client, with unit tests. According to the instructions for migrating to 1.3, I moved the package to import, but still want to unit test it server-side. It appears that for some reason Meteor treads the AWS module as available client-side and I have not been able to figure out how to prevent that.

9

So as you probably saw, the AWS module uses its own custom require implementation that checks the value of process.browser. The work-around I came up with after I posted my question below is

process.browser = false
const AWS = Npm.require('aws-sdk')
process.browser = testHack```
10

Tracked it down so far to http://j.mp/1TFpEDn setting process.browser = true, but since this is a generated file and that line is nowhere in the source, I presume it’s put in there by the build.