brush-shell 0.4.0

Rust-implemented shell focused on POSIX and bash compatibility
Documentation 
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name: "Variable tests"
cases:
  - name: "Appending to a variable"
    stdin: |
      x=something
      x+=here
      echo "x: ${x}"

  - name: "Appending an integer to an integer variable"
    stdin: |
      declare -i x=10
      echo "x: ${x}"
      x+=5
      echo "x: ${x}"
      x+=value
      echo "x: ${x}"

      y=value
      declare -i y
      echo "y: ${y}"
      y+=5
      echo "y: ${y}"

  - name: "Append to an unset variable"
    stdin: |
      declare -a myvar
      myvar+=abc
      echo "myvar: ${myvar}"

      declare -i myint
      myint+=abc
      echo "myint: ${myint}"

  - name: "Parameter length of unset variable with nounset"
    ignore_stderr: true
    stdin: |
      set -u
      echo "${#unset_var}" 2>&1 || true
      arr=()
      echo "${#arr[0]}"
      echo "${#arr[@]}"
      arr2=(hello world)
      echo "${#arr2[5]}"
      echo "${#arr2[0]}"