name: "Builtins: cd"
cases:
  - name: "Basic cd usage"
    ignore_stderr: true
    stdin: |
      echo "cd /"
      cd /
      echo $?
      echo "pwd: $PWD"

      echo "cd usr"
      cd usr
      echo $?
      echo "pwd: $PWD"

      echo "cd"
      cd
      echo $?
      echo "pwd: $PWD"

  - name: "cd to file"
    ignore_stderr: true
    test_files:
      - path: "file"
        contents: "file contents"
    stdin: |
      ls -1
      cd file
      echo $?
      ls -1

  - name: "cd -"
    ignore_stderr: true
    stdin: |
      cd /
      echo "pwd: $PWD"
      cd usr
      echo "pwd: $PWD"
      echo "oldpwd: $OLDPWD"
      cd -
      echo $?
      echo "pwd: $PWD"

  - name: "cd ~"
    stdin: |
      mkdir ./my_home
      export HOME="$(realpath ./my_home)"
      echo "Set HOME: $(basename $HOME)"
      (
        echo "Subshell 1: HOME=$(basename $HOME)"
        cd ~
        echo "pwd: $(basename $PWD)"
      )
      (
        echo "Subshell 2: HOME=$(basename $HOME)"
        cd -L ~
        echo "pwd: $(basename $PWD)"
      )
      (
        echo "Subshell 3: HOME=$(basename $HOME)"
        cd -P ~
        echo "pwd: $(basename $PWD)"
      )

  - name: "cd with symlink"
    stdin: |
      mkdir -p ./level1/level2/level3
      cd level1
      ln -s ./level2/level3 ./symlink

      # -L by default
      (
        cd ./symlink
        echo "$(basename $PWD)"
        cd ..
        echo "$(basename $PWD)"
      )

  - name: "cd -L"
    stdin: |
      mkdir -p ./level1/level2/level3
      cd level1
      ln -s ./level2/level3 ./symlink

      echo "[Case 1]"
      (
        cd ./symlink
        echo "$(basename $PWD)"
        cd -L ..
        echo "$(basename $PWD)"
      )

      echo "[Case 2]"
      (
        cd -L ./symlink
        echo "$(basename $PWD)"
        cd ..
        echo "$(basename $PWD)"
      )

      # without pwd
      echo "[Case 3]"
      (
        cd -L ./symlink
        echo "$(basename $PWD)"
        export PWD=
        cd -L ..
        echo "$(basename $PWD)"
      )

      echo "[Case 4]"
      (
        cd -L ./symlink
        export PWD=
        # start a shell without $PWD
        (
          cd .
          echo "$(basename $PWD)"
        )
      )

  - name: "cd -P"
    stdin: |
      mkdir -p ./level1/level2/level3
      cd level1
      ln -s ./level2/level3 ./symlink

      echo "[Case 1]"
      (
        cd ./symlink
        echo "cd ./symlink => $(basename $PWD)"
        cd -P ..
        echo "cd -P .. => $(basename $PWD)"
      )

      echo "[Case 2]"
      (
        cd -P ./symlink
        echo "cd -P ./symlink => $(basename $PWD)"
        cd ..
        echo "cd .. => $(basename $PWD)"
      )

  - name: "OLDPWD"
    env:
      OLDPWD: "/nonexistent/path"
    stdin: |
      mkdir subdir

      echo "[0]"
      echo ${OLDPWD+set}

      echo "[1]"
      echo ${OLDPWD-NOTSET}

      echo "[2]"
      declare -p OLDPWD 2>&1 | grep -o "declare -[a-z]* OLDPWD"

      echo "[3]"
      env | grep "^OLDPWD=" || echo "NOT_IN_ENV"

      echo
      echo "[Unsetting + cd'ing...]"
      unset OLDPWD
      cd $PWD/subdir

      echo "[4]"
      declare -p OLDPWD 2>&1 | grep -o "declare -[a-z]* OLDPWD"

      echo "[5]"
      env | grep -o "^OLDPWD="