/usr/share/seed-gtk4-tests/javascript/fork.js is in libseed-gtk4-0 4.0.0+20161014+6c77960+dfsg1-5build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 | #!/usr/bin/env seed
testsuite = imports.testsuite
os = imports.os
a = os.fork()
testsuite.assert(a >= 0)
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