# Copyright (c) 2019-2024, see AUTHORS. Licensed under MIT License, see LICENSE.

load lib

function flake_example() {
  local flake_url="$1"
  local flake_file_name="$2"

  # assertions to verify initial state is as expected
  assert_command vim
  assert_no_command unzip

  # set up / build / activate the configuration
  _sed \
    -e 's/vim/nano/' \
    -e 's/#unzip/unzip/' \
    "$CHANNEL_DIR/modules/environment/login/nix-on-droid.nix.default" \
    > ~/.config/nixpkgs/nix-on-droid.nix

  _sed -e "s|<<FLAKE_URL>>|$FLAKE_URL|g" -e "s|<<SYSTEM>>|$(detect_system)|g" \
    "$ON_DEVICE_TESTS_DIR/$flake_file_name" \
    > ~/.config/nixpkgs/flake.nix

  nix-on-droid switch --flake "$flake_url"

  # test presence of several crucial commands
  assert_command nix-on-droid nix-shell bash

  # test that nano has replaced vim and unzip has appeared in $PATH
  assert_command nano unzip
  assert_no_command vim

  # check that reverting works too
  switch_to_default_config
  assert_command vim
  assert_no_command unzip
}

@test 'flake example works' {
  flake_example ~/.config/nixpkgs#device config-flake.nix
}

@test 'flake with default config works' {
  flake_example ~/.config/nixpkgs config-flake-default.nix
}