regression: 8789f9108 broke environment-variable preservation

[Eduardo Santiago]

Commit 8789f910812afbf6b87dd371ee5ae30592f1423f ("support parallel execution of tests") broke existing BATS behavior in which a test file can set environment variables to be shared between subtests:

    if [ -z "$MYSTATE" ]; then
        do something
        export MYSTATE=something-to-be-used-by-all-tests
    fi

Attached is a reproducer. It passes in 8789f9108^ and, more importantly, bats-core.

[Eduardo Santiago (ubuntu-le)]

Be sure to remove the statefile before invoking the reproducer:

    $ rm -f /tmp/mystate;/usr/local/bin/bats -t env-lost.bats
    1..2
    ok 1 first test
    # linecount is 2 (expected 1)
    not ok 2 second test
    # (in test file env-lost.bats, line 25)
    # `false' failed

[Gioele Barabucci (gioele)]

This issue has been fixed in bats 1.8.2.