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#!/bin/sh

# Save the PATH as it was when the test started to restore it when it
# finishes
ORIG_PATH="${PATH}"

cleanup() {
  # Restore the PATH as it was when the test started
  export PATH="${ORIG_PATH}"
}

die () { cleanup; echo "$@" ; exit 1; }

\. ../../../nvm.sh

# Directory where mocked binaries used by nvm_get_arch for each OS/arch are
# located
MOCKS_DIR="$(pwd)/../../mocks"
# Sets the PATH for these tests to include the symlinks to the mocked
# binaries
export PATH=".:${PATH}"

# Setups mock binaries for a given OS and arch that mimic
# the output of the real binaries used by nvm_get_arch to guess
# the architecture of a given system.
setup_mock_arch() {
  local OS
  OS=$1
  local ARCH
  ARCH=$2
  local OPT
  OPT=$3

  if [ "_${OS}" = '_solaris' ] || [ "_${OS}" = '_smartos' ]; then
    ln -sf "${MOCKS_DIR}/isainfo_${ARCH}" ./isainfo
    if [ "_$OPT" != "_no_pkg_info" ]; then
      ln -sf "${MOCKS_DIR}/pkg_info_${ARCH}" ./pkg_info
    else
      ln -sf "${MOCKS_DIR}/pkg_info_fail" ./pkg_info
    fi
  fi

  ln -sf "${MOCKS_DIR}/uname_${OS}_${ARCH}" ./uname
}

# Cleans up the setup done by setup_mock_arch.
cleanup_mock_arch() {
  local OS
  OS=$1
  local ARCH
  ARCH=$2

  if [ "_${OS}" = '_solaris' ] || [ "_${OS}" = '_smartos' ]; then
    rm -f ./isainfo
    rm -f ./pkg_info
  fi

  rm -f ./uname
}

# Runs nvm_get_arch for architecture $ARCH and OS $OS, and compares the
# expected output $EXPECTED_OUTPUT with the actual output. Does nothing
# and exits cleanly if they match, dies otherwise.
run_test() {
  local ARCH
  ARCH=$1
  local OS
  OS=$2
  local EXPECTED_OUTPUT
  EXPECTED_OUTPUT=$3
  local OPT
  OPT=$4

  setup_mock_arch "${OS}" "${ARCH}" "${OPT}"
  local OUTPUT
  OUTPUT="$(nvm_get_arch)"
  cleanup_mock_arch "${OS}" "${ARCH}"
  [ "_${OUTPUT}" = "_${EXPECTED_OUTPUT}" ] ||
    die "nvm_get_arch for OS \"${OS}\" and arch \"${ARCH}\" with OPT \"${OPT}\" did
    not return \"${EXPECTED_OUTPUT}\"; got \"${OUTPUT}\""
}

run_test x86 smartos x86
run_test x86 smartos x86 no_pkg_info

run_test amd64 smartos x64
run_test amd64 smartos x64 no_pkg_info

run_test x86 osx x86
run_test amd64 osx x64

run_test arm64 smartos x64
run_test armv8l smartos x64

cleanup