Integration fails with jest 22 + node.js 4 on @std/esm 0.19.1

[JLHwung]

It's me again. 😁

After upgrading to 0.19.1, node.js 4 complains that

SyntaxError: Unexpected token {
      
      at _load_jsdom (node_modules/jest-environment-jsdom/build/index.js:16:41)

node 6, 8, 9 is unaffected. I guess some unbabelified code is executed.

CI Result is here.

[jdalton]

Hi @JLHwung!

I don't think this is a @std/esm issue.
Jest v22 dropped Node 4 support and JSDOM now requires Node 6 or higher.

Let me know if that's not it.

[JLHwung]

Hi @jdalton
While Jest v22 dropped Node 4 support due to jsdom, unofficial node 4 support is added jestjs/jest#5134 so we can use jest if test does not depend on JSDOM.

The test passes when specifying

testEnvironment: "node"

on jest config.

I should have specified testEnvironment earlier. Thank you for your great help.