-all                  generate tests for all functions and methods

  -excl                 regexp. generate tests for functions and methods that don't
                         match. Takes precedence over -only, -exported, and -all

  -exported             generate tests for exported functions and methods. Takes
                         precedence over -only and -all

  -i                    print test inputs in error messages

  -only                 regexp. generate tests for functions and methods that match only.
                         Takes precedence over -all

  -nosubtests           disable subtest generation when >= Go 1.7

  -parallel             enable parallel subtest generation when >= Go 1.7.

  -w                    write output to (test) files instead of stdout

  -template_dir         Path to a directory containing custom test code templates. Takes
                         precedence over -template. This can also be set via environment
                         variable GOTESTS_TEMPLATE_DIR

  -template             Specify custom test code templates, e.g. testify. This can also
                         be set via environment variable GOTESTS_TEMPLATE

  -template_params_file read external parameters to template by json with file

  -template_params      read external parameters to template by json with stdin