assert builtins.pathExists (./lib.nix);
assert builtins.pathExists (builtins.toPath ./lib.nix);
assert builtins.pathExists (builtins.toString ./lib.nix);
assert !builtins.pathExists (builtins.toString ./lib.nix + "/");
assert !builtins.pathExists (builtins.toString ./lib.nix + "/.");
# FIXME
# assert !builtins.pathExists (builtins.toString ./lib.nix + "/..");
# assert !builtins.pathExists (builtins.toString ./lib.nix + "/a/..");
# assert !builtins.pathExists (builtins.toString ./lib.nix + "/../lib.nix");
assert !builtins.pathExists (builtins.toString ./lib.nix + "/./");
assert !builtins.pathExists (builtins.toString ./lib.nix + "/./.");
assert builtins.pathExists (builtins.toString ./.. + "/test-home/lib.nix");
assert !builtins.pathExists (builtins.toString ./.. + "test-home/lib.nix");
assert builtins.pathExists (builtins.toString ./. + "/../test-home/lib.nix");
assert builtins.pathExists (builtins.toString ./. + "/../test-home/./lib.nix");
assert builtins.pathExists (builtins.toString ./.);
assert builtins.pathExists (builtins.toString ./. + "/");
assert builtins.pathExists (builtins.toString ./. + "/../test-home");
assert builtins.pathExists (builtins.toString ./. + "/../test-home/");
assert builtins.pathExists (builtins.toString ./. + "/../test-home/.");
assert builtins.pathExists (builtins.toString ./. + "/../test-home/./");
assert builtins.pathExists (builtins.toString ./. + "/../test-home//./");
assert builtins.pathExists (builtins.toString ./. + "/../test-home/..");
assert builtins.pathExists (builtins.toString ./. + "/../test-home/../");
assert builtins.pathExists (builtins.toString ./. + "/../test-home/..//");
assert builtins.pathExists (builtins.toPath (builtins.toString ./lib.nix));
assert !builtins.pathExists (builtins.toPath (builtins.toString ./bla.nix));
assert builtins.pathExists ./lib.nix;
assert !builtins.pathExists ./bla.nix;
assert builtins.pathExists ./symlink-resolution/foo/overlays/overlay.nix;
assert builtins.pathExists ./symlink-resolution/broken;
assert builtins.pathExists (builtins.toString ./symlink-resolution/foo/overlays + "/.");
true