test

Check file types and compare values. Returns 0 if the condition evaluates to true, 1 if it evaluates to false. More information: https://www.gnu.org/software/coreutils/test.

• Test if a given variable is equal to a given string:
  test "{{$MY_VAR}}" == "{{/bin/zsh}}"
• Test if a given variable is empty:
  test -z "{{$GIT_BRANCH}}"
• Test if a file exists:
  test -f "{{path/to/file_or_directory}}"
• Test if a directory does not exist:
  test ! -d "{{path/to/directory}}"
• If A is true, then do B, or C in the case of an error (notice that C may run even if A fails):
  test {{condition}} && {{echo "true"}} || {{echo "false"}}