import * as std from "std";import * as os from "os"; function assert(actual, expected, message) {    if (arguments.length == 1)        expected = true;     if (actual === expected)        return;     if (actual !== null && expected !== null    &&  typeof actual == 'object' && typeof expected == 'object'    &&  actual.toString() === expected.toString())        return;     throw Error("assertion failed: got |" + actual + "|" +                ", expected |" + expected + "|" +                (message ? " (" + message + ")" : ""));} // load more elaborate version of assert if availabletry { std.loadScript("test_assert.js"); } catch(e) {} /*----------------*/ function test_printf(){    assert(std.sprintf("a=%d s=%s", 123, "abc"), "a=123 s=abc");    assert(std.sprintf("%010d", 123), "0000000123");    assert(std.sprintf("%x", -2), "fffffffe");    assert(std.sprintf("%lx", -2), "fffffffffffffffe");    assert(std.sprintf("%10.1f", 2.1), "       2.1");    assert(std.sprintf("%*.*f", 10, 2, -2.13), "     -2.13");    assert(std.sprintf("%#lx", 0x7fffffffffffffffn), "0x7fffffffffffffff");} function test_file1(){    var f, len, str, size, buf, ret, i, str1;     f = std.tmpfile();    str = "hello world\n";    f.puts(str);     f.seek(0, std.SEEK_SET);    str1 = f.readAsString();    assert(str1 === str);        f.seek(0, std.SEEK_END);    size = f.tell();    assert(size === str.length);     f.seek(0, std.SEEK_SET);     buf = new Uint8Array(size);    ret = f.read(buf.buffer, 0, size);    assert(ret === size);    for(i = 0; i < size; i++)        assert(buf[i] === str.charCodeAt(i));     f.close();} function test_file2(){    var f, str, i, size;    f = std.tmpfile();    str = "hello world\n";    size = str.length;    for(i = 0; i < size; i++)        f.putByte(str.charCodeAt(i));    f.seek(0, std.SEEK_SET);    for(i = 0; i < size; i++) {        assert(str.charCodeAt(i) === f.getByte());    }    assert(f.getByte() === -1);    f.close();} function test_getline(){    var f, line, line_count, lines, i;        lines = ["hello world", "line 1", "line 2" ];    f = std.tmpfile();    for(i = 0; i < lines.length; i++) {        f.puts(lines[i], "\n");    }     f.seek(0, std.SEEK_SET);    assert(!f.eof());    line_count = 0;    for(;;) {        line = f.getline();        if (line === null)            break;        assert(line == lines[line_count]);        line_count++;    }    assert(f.eof());    assert(line_count === lines.length);     f.close();} function test_popen(){    var str, f, fname = "tmp_file.txt";    var content = "hello world";     f = std.open(fname, "w");    f.puts(content);    f.close();     /* test loadFile */    assert(std.loadFile(fname), content);        /* execute the 'cat' shell command */    f = std.popen("cat " + fname, "r");    str = f.readAsString();    f.close();     assert(str, content);     os.remove(fname);} function test_ext_json(){    var expected, input, obj;    expected = '{"x":false,"y":true,"z2":null,"a":[1,8,160],"s":"str"}';    input = `{ "x":false, /*comments are allowed */               "y":true,  // also a comment               z2:null, // unquoted property names               "a":[+1,0o10,0xa0,], // plus prefix, octal, hexadecimal               "s":"str",} // trailing comma in objects and arrays            `;    obj = std.parseExtJSON(input);    assert(JSON.stringify(obj), expected);} function test_os(){    var fd, fpath, fname, fdir, buf, buf2, i, files, err, fdate, st, link_path;     assert(os.isatty(0));     fdir = "test_tmp_dir";    fname = "tmp_file.txt";    fpath = fdir + "/" + fname;    link_path = fdir + "/test_link";        os.remove(link_path);    os.remove(fpath);    os.remove(fdir);     err = os.mkdir(fdir, 0o755);    assert(err === 0);        fd = os.open(fpath, os.O_RDWR | os.O_CREAT | os.O_TRUNC);    assert(fd >= 0);        buf = new Uint8Array(10);    for(i = 0; i < buf.length; i++)        buf[i] = i;    assert(os.write(fd, buf.buffer, 0, buf.length) === buf.length);     assert(os.seek(fd, 0, std.SEEK_SET) === 0);    buf2 = new Uint8Array(buf.length);    assert(os.read(fd, buf2.buffer, 0, buf2.length) === buf2.length);        for(i = 0; i < buf.length; i++)        assert(buf[i] == buf2[i]);        if (typeof BigInt !== "undefined") {        assert(os.seek(fd, BigInt(6), std.SEEK_SET), BigInt(6));        assert(os.read(fd, buf2.buffer, 0, 1) === 1);        assert(buf[6] == buf2[0]);    }        assert(os.close(fd) === 0);     [files, err] = os.readdir(fdir);    assert(err, 0);    assert(files.indexOf(fname) >= 0);     fdate = 10000;     err = os.utimes(fpath, fdate, fdate);    assert(err, 0);        [st, err] = os.stat(fpath);    assert(err, 0);    assert(st.mode & os.S_IFMT, os.S_IFREG);    assert(st.mtime, fdate);     err = os.symlink(fname, link_path);    assert(err === 0);        [st, err] = os.lstat(link_path);    assert(err, 0);    assert(st.mode & os.S_IFMT, os.S_IFLNK);     [buf, err] = os.readlink(link_path);    assert(err, 0);    assert(buf, fname);        assert(os.remove(link_path) === 0);     [buf, err] = os.getcwd();    assert(err, 0);     [buf2, err] = os.realpath(".");    assert(err, 0);     assert(buf, buf2);        assert(os.remove(fpath) === 0);     fd = os.open(fpath, os.O_RDONLY);    assert(fd < 0);     assert(os.remove(fdir) === 0);} function test_os_exec(){    var ret, fds, pid, f, status;     ret = os.exec(["true"]);    assert(ret, 0);     ret = os.exec(["/bin/sh", "-c", "exit 1"], { usePath: false });    assert(ret, 1);        fds = os.pipe();    pid = os.exec(["sh", "-c", "echo $FOO"], {        stdout: fds[1],        block: false,        env: { FOO: "hello" },    } );    assert(pid >= 0);    os.close(fds[1]); /* close the write end (as it is only in the child)  */    f = std.fdopen(fds[0], "r");    assert(f.getline(), "hello");    assert(f.getline(), null);    f.close();    [ret, status] = os.waitpid(pid, 0);    assert(ret, pid);    assert(status & 0x7f, 0); /* exited */    assert(status >> 8, 0); /* exit code */     pid = os.exec(["cat"], { block: false } );    assert(pid >= 0);    os.kill(pid, os.SIGQUIT);    [ret, status] = os.waitpid(pid, 0);    assert(ret, pid);    assert(status & 0x7f, os.SIGQUIT);} function test_timer(){    var th, i;     /* just test that a timer can be inserted and removed */    th = [];    for(i = 0; i < 3; i++)        th[i] = os.setTimeout(function () { }, 1000);    for(i = 0; i < 3; i++)        os.clearTimeout(th[i]);} test_printf();test_file1();test_file2();test_getline();test_popen();test_os();test_os_exec();test_timer();test_ext_json();