Issue Reproduction

This project is a bug reproduction

Setup

To run the tests illustrating the issue here, you will need a local postgresql database.

The following psql commands can get you started with local credentials and databases:

postgres=# CREATE ROLE example WITH LOGIN PASSWORD '{enter local password here}';
# note: this permission is required to install postgresql extensions (such as "uuid-ossp")
postgres=# ALTER USER example WITH SUPERUSER;
# Create app database (runtime, not needed to run integration tests)
postgres=# CREATE DATABASE "example";
postgres=# GRANT ALL PRIVILEGES ON DATABASE "example" TO example;
postgres=# ALTER DATABASE "example" OWNER TO example;
# Create test database
postgres=# CREATE DATABASE "example-test";
postgres=# GRANT ALL PRIVILEGES ON DATABASE "example-test" TO example;
postgres=# ALTER DATABASE "example-test" OWNER TO example;

You can run the \l pg command to verify your local setup:

postgres-# \l
                             List of databases
     Name     |  Owner  | Encoding | Collate | Ctype |  Access privileges  
--------------+---------+----------+---------+-------+---------------------
 example      | example | UTF8     | C       | C     | =Tc/example        +
              |         |          |         |       | example=CTc/example
 example-test | example | UTF8     | C       | C     | =Tc/example        +
              |         |          |         |       | example=CTc/example

Finally, install the dependencies:

yarn install

You can check the running "example-app" application if you wish by running

yarn nx run example-app:serve

Reproduce

It seems something change in [email protected] causing the globalTeardown script to crash (and the tests to fail)

• the master branch illustrate a working scenario using ts-jest locked to 27.1.2
• a branch named reproduction/ts-jest-27.1.3 illustrate the bug (only change being the update from 27.1.2 to 27.1.3)

Steps

Run on master branch and notice the successful tests

git checkout master
yarn install
yarn run test:all

NX Successfully ran target test for 3 projects

Then checkout the branch and notice an error:

git checkout reproduction/ts-jest-27.1.3
yarn install
yarn run test:all

[TSError: apps/example-app-integration/jest/globalTeardown.ts:5:13 - error TS2695: Left side of comma operator is unused and has no side effects.

  5     return (0, tslib_1.__awaiter)(this, void 0, void 0, function* () {