test: split wasi poll test for windows

test/wasi/c/poll.c

@@ -31,6 +31,9 @@ int main(void) {
   assert(ret == 0);
   assert(now - before >= 2);
 
+  // V8 has a bug that allows unsupported parts of this test to run,
+  // causing the test to fail. poll_win.c is a workaround.
+  // https://github.com/nodejs/node/issues/51822
   // The rest of the test is unsupported on Windows.
   if (is_win)
     return 0;

test/wasi/c/poll_win.c

@@ -0,0 +1,26 @@
+#include <assert.h>
+#include <poll.h>
+#include <time.h>
+#include <unistd.h>
+
+int main(void) {
+  struct pollfd fds[4];
+  time_t before, now;
+  int ret;
+
+  // Test sleep() behavior.
+  time(&before);
+  sleep(1);
+  time(&now);
+  assert(now - before >= 1);
+
+  // Test poll() timeout behavior.
+  fds[0] = (struct pollfd){.fd = -1, .events = 0, .revents = 0};
+  time(&before);
+  ret = poll(fds, 1, 2000);
+  time(&now);
+  assert(ret == 0);
+  assert(now - before >= 2);
+
+  return 0;
+}

test/wasi/test-wasi-poll.js

@@ -2,4 +2,4 @@
 require('../common');
 const { testWasiPreview1 } = require('../common/wasi');
 
-testWasiPreview1(['poll']);
+testWasiPreview1([process.platform === 'win32' ? 'poll_win' : 'poll']);

test/wasi/wasi.status

@@ -6,7 +6,3 @@ prefix wasi
 
 [true] # This section applies to all platforms
 
-# Windows on ARM
-[$system==win32 && $arch==arm64]
-# https://github.com/nodejs/node/issues/51822
-test-wasi-poll: PASS, FLAKY