bats
Bash Automated Testing System: a TAP (<https://testanything.org/>) compliant testing framework for Bash.
TLDR
Run a BATS test script and output results in the [t]AP (Test Anything Protocol) format
$ bats --tap [path/to/test.bats]
[c]ount test cases of a test script without running any tests
$ bats --count [path/to/test.bats]
Run BATS test cases [r]ecursively (files with a .bats extension)
$ bats --recursive [path/to/directory]
Output results in a specific [F]ormat
$ bats --formatter [pretty|tap|tap13|junit] [path/to/test.bats]
Add [T]iming information to tests
$ bats --timing [path/to/test.bats]
Run specific number of [j]obs in parallel (requires GNU parallel to be installed)
$ bats --jobs [number] [path/to/test.bats]