print("\n--- Test: builtin imports ---");

import sys;
assert(type(sys) == "module", "sys is module");

from sys import memoryUsage as mem;
var m = mem();
assert(type(m) == "number" || type(m) == "none", "memoryUsage returns number or none");

from sys import cwd, platform, getenv, pid, chdir, homeDir, tempDir, pathSep, dirSep, execPath, env, setenv, unsetenv;
var dir = cwd();
assert(type(dir) == "string" || type(dir) == "none", "cwd returns string/none");
var plat = platform();
assert(type(plat) == "string", "platform returns string");
var home = getenv("HOME");
assert(type(home) == "string" || type(home) == "none", "getenv returns string/none");
var p = pid();
assert(type(p) == "number", "pid returns number");

var hs = homeDir();
assert(type(hs) == "string" || type(hs) == "none", "homeDir returns string/none");
var td = tempDir();
assert(type(td) == "string", "tempDir returns string");
var ps = pathSep();
assert(type(ps) == "string", "pathSep is string");
var ds = dirSep();
assert(type(ds) == "string", "dirSep is string");
var exe = execPath();
assert(type(exe) == "string" || type(exe) == "none", "execPath returns string/none");

var e = env();
assert(type(e) == "dict", "env returns dict");
var okset = setenv("BOB_TEST_ENV", "xyz");
assert(okset == true || okset == false, "setenv returns bool");
var gv = getenv("BOB_TEST_ENV");
assert(type(gv) == "string" || type(gv) == "none", "getenv after setenv");
var okunset = unsetenv("BOB_TEST_ENV");
assert(okunset == true || okunset == false, "unsetenv returns bool");

print("builtin imports: PASS");