class: GalaxyUserTool
id: cat_multiple_user_defined
version: "0.1"
name: Concatenate Multiple Files
description: tail-to-head
container: busybox
shell_command: |
  cat $(inputs.datasets.map((input) => `'${input.path}'`).join(' ')) > output.txt
inputs:
  - name: datasets
    type: data
    multiple: true
outputs:
  - name: output1
    type: data
    format_source: datasets
    from_work_dir: output.txt
tests:
  - inputs:
      datasets:
        - simple_line.txt
        - simple_line_alternative.txt
    outputs:
      output1:
        asserts:
          - has_line:
              line: This is a different line of text.
          - has_line:
              line: This is a line of text.