# test > Check file types and compare values. > Returns 0 if the condition evaluates to true, 1 if it evaluates to false. > More information: . - 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-else statement: `test {{condition}} && {{echo "true"}} || {{echo "false"}}`