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//! End-to-end smoke test: drive the real `pardes` binary under a pty, type a
//! command, resize, then exit, and verify it rendered and tore down cleanly
//! (no hang, no panic). Path to the binary comes in as argv[1] (build wires it).
//! Pure-Zig port of the former smoke.py.
const std = @import("std");
const posix = std.posix;
// libc bits std.posix no longer exposes; same extern style as main.zig.
extern "c" fn forkpty(amaster: *c_int, name: ?[*:0]u8, termp: ?*const anyopaque, winp: ?*const posix.winsize) c_int;
extern "c" fn execvp(file: [*:0]const u8, argv: [*:null]const ?[*:0]const u8) c_int;
extern "c" fn setenv(name: [*:0]const u8, value: [*:0]const u8, overwrite: c_int) c_int;
extern "c" fn write(fd: c_int, buf: [*]const u8, count: usize) isize;
extern "c" fn waitpid(pid: c_int, status: *c_int, options: c_int) c_int;
extern "c" fn _exit(status: c_int) noreturn;
// ponytail: global state, single-threaded driver. The 256K capture buffer holds
// a few frames; on overflow we stop appending (search/len checks still hold).
// Grow to an ArrayList only if that limit bites.
var captured: [256 * 1024]u8 = undefined;
var cap_len: usize = 0;
var master: c_int = undefined;
var io: std.Io = undefined;
fn send(s: []const u8) void {
_ = write(master, s.ptr, s.len);
}
/// Pump output for `ms` milliseconds. Returns false on EOF (master closed).
fn pump(ms: i64) bool {
const end = std.Io.Timestamp.now(io, .awake).toMilliseconds() + ms; // .awake == monotonic
var buf: [65536]u8 = undefined;
while (std.Io.Timestamp.now(io, .awake).toMilliseconds() < end) {
var fds = [_]posix.pollfd{.{ .fd = master, .events = posix.POLL.IN, .revents = 0 }};
const ready = posix.poll(&fds, 100) catch 0;
if (ready == 0 or fds[0].revents & posix.POLL.IN == 0) continue;
const n = posix.read(master, &buf) catch return false; // EIO == child gone
if (n == 0) return false;
const chunk = buf[0..n];
if (cap_len + n <= captured.len) {
@memcpy(captured[cap_len..][0..n], chunk);
cap_len += n;
}
// Answer the queries vaxis sends, like a real terminal would. The DSR
// one (\x1b[5n -> \x1b[0n) is what wakes loop.stop()'s reader on teardown.
if (std.mem.indexOf(u8, chunk, "\x1b[5n") != null) send("\x1b[0n");
if (std.mem.indexOf(u8, chunk, "\x1b[6n") != null) send("\x1b[1;1R"); // cursor pos -> 1,1
if (std.mem.indexOf(u8, chunk, "\x1b[c") != null) send("\x1b[?6c"); // device attrs
if (std.mem.indexOf(u8, chunk, "\x1b[?996n") != null) send("\x1b[?997;1n"); // scheme -> dark
}
return true;
}
pub fn main(init: std.process.Init) void {
io = init.io;
var args = init.minimal.args.iterate();
_ = args.skip(); // argv[0]
const app: [*:0]const u8 = (args.next() orelse {
std.debug.print("usage: smoke <path-to-pardes>\n", .{});
std.process.exit(2);
}).ptr;
const ws = posix.winsize{ .row = 24, .col = 80, .xpixel = 0, .ypixel = 0 };
const pid = forkpty(&master, null, null, &ws);
if (pid == 0) {
_ = setenv("TERM", "xterm-256color", 1);
const argv = [_:null]?[*:0]const u8{ app, null };
_ = execvp(app, &argv);
_exit(127);
}
_ = pump(800); // let vaxis init + shell prompt render
send("echo PARDES_OK\r");
_ = pump(800);
// Exercise the resize path: shrink the pty and signal the app.
const ws_new = posix.winsize{ .row = 30, .col = 100, .xpixel = 0, .ypixel = 0 };
_ = posix.system.ioctl(master, posix.T.IOCSWINSZ, @intFromPtr(&ws_new));
posix.kill(pid, posix.SIG.WINCH) catch {};
_ = pump(500);
send("echo AFTER_RESIZE\r");
_ = pump(600);
send("exit\r"); // shell exits -> child EOF -> app tears down
// Wait for the app to exit, still draining output.
const deadline = std.Io.Timestamp.now(io, .awake).toMilliseconds() + 12_000;
var status: ?u32 = null;
while (std.Io.Timestamp.now(io, .awake).toMilliseconds() < deadline) {
_ = pump(300);
var st: c_int = 0;
if (waitpid(pid, &st, posix.W.NOHANG) == pid) {
status = @bitCast(st);
break;
}
}
const out = captured[0..cap_len];
std.debug.print("captured {d} bytes of rendered output\n", .{out.len});
var ok = true;
if (status) |st| {
if (posix.W.IFSIGNALED(st)) {
std.debug.print("FAIL: app killed by signal {d}\n", .{@intFromEnum(posix.W.TERMSIG(st))});
ok = false;
} else {
const code = posix.W.EXITSTATUS(st);
std.debug.print("app exited with code {d}\n", .{code});
if (code != 0) ok = false;
}
} else {
std.debug.print("FAIL: app did not exit within timeout (possible deadlock)\n", .{});
posix.kill(pid, posix.SIG.KILL) catch {};
var st: c_int = 0;
_ = waitpid(pid, &st, 0);
ok = false;
}
for ([_][]const u8{ "panic", "segmentation", "sigsegv", "unreachable" }) |needle| {
if (std.ascii.indexOfIgnoreCase(out, needle) != null) {
std.debug.print("FAIL: '{s}' found in output\n", .{needle});
ok = false;
}
}
// Alt-screen enter / clear / home means vaxis painted at least one frame.
const rendered = std.mem.indexOf(u8, out, "\x1b[?1049h") != null or
std.mem.indexOf(u8, out, "\x1b[2J") != null or
std.mem.indexOf(u8, out, "\x1b[H") != null or
out.len > 200;
std.debug.print("rendered something: {}\n", .{rendered});
if (!rendered) ok = false;
std.debug.print("RESULT: {s}\n", .{if (ok) "PASS" else "FAIL"});
std.process.exit(if (ok) 0 else 1);
}
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