devshell/tests/devshell_test.nix

{
  pkgs,
  ntlib,
  devshell,
  ...
}: {
  suites."Devshell Tests" = {
    pos = __curPos;
    tests = [
      {
        name = "basic";
        type = "script";
        script = let
          shell = devshell.mkShell {};
        in
          # sh
          ''
            ${ntlib.helpers.path [pkgs.gnugrep]}
            ${ntlib.helpers.scriptHelpers}
            assert_file_contains ${shell}/env.bash "XDG_DATA_DIRS" "should contain XDG_DATA_DIRS"
          '';
      }
      {
        name = "packages";
        type = "script";
        script = let
          shell = devshell.mkShell {
            packages = [pkgs.hello];
          };
        in
          # sh
          ''
            ${ntlib.helpers.scriptHelpers}
            assert "-f ${shell}/bin/hello" "/bin/hello should exist"
          '';
      }
      {
        name = "env";
        type = "script";
        script = let
          shell = devshell.mkShell {
            env."HELLO".value = "world";
          };
        in
          # sh
          ''
            ${ntlib.helpers.path [pkgs.gnugrep]}
            ${ntlib.helpers.scriptHelpers}
            assert_file_contains ${shell}/env.bash "HELLO" "should contain HELLO"
            assert_file_contains ${shell}/env.bash "world" "should contain world"
          '';
      }
    ];
  };
}