From 0bbeb68b5ff6c42353cf660607b86c797067f997 Mon Sep 17 00:00:00 2001
From: Edoardo Vacchi <evacchi@users.noreply.github.com>
Date: Tue, 18 Jul 2023 19:04:31 +0200
Subject: [PATCH] test

Signed-off-by: Edoardo Vacchi <evacchi@users.noreply.github.com>
---
 internal/platform/fdset_windows_test.go | 109 ++++++++++++++++++++++++
 internal/sysfs/select_windows.go        |   1 -
 2 files changed, 109 insertions(+), 1 deletion(-)
 create mode 100644 internal/platform/fdset_windows_test.go

diff --git a/internal/platform/fdset_windows_test.go b/internal/platform/fdset_windows_test.go
new file mode 100644
index 0000000000..3e56b21b8e
--- /dev/null
+++ b/internal/platform/fdset_windows_test.go
@@ -0,0 +1,109 @@
+package platform
+
+import (
+	"syscall"
+	"testing"
+
+	"github.com/tetratelabs/wazero/internal/testing/require"
+)
+
+func TestWinSockFdSet(t *testing.T) {
+	allSet := WinSockFdSet{
+		count: _FD_SETSIZE,
+	}
+	for i := 0; i < _FD_SETSIZE; i++ {
+		allSet.handles[i] = syscall.Handle(i)
+	}
+
+	tests := []struct {
+		name     string
+		init     WinSockFdSet
+		exec     func(fdSet *WinSockFdSet)
+		expected WinSockFdSet
+	}{
+		{
+			name: "all fields set",
+			exec: func(fdSet *WinSockFdSet) {
+				for fd := 0; fd < _FD_SETSIZE; fd++ {
+					fdSet.Set(fd)
+				}
+			},
+			expected: allSet,
+		},
+		{
+			name: "all bits cleared",
+			init: allSet,
+			exec: func(fdSet *WinSockFdSet) {
+				for fd := 0; fd < _FD_SETSIZE; fd++ {
+					fdSet.Clear(fd)
+				}
+			},
+			expected: WinSockFdSet{},
+		},
+		{
+			name: "zero should clear all bits",
+			init: allSet,
+			exec: func(fdSet *WinSockFdSet) {
+				fdSet.Zero()
+			},
+			expected: WinSockFdSet{},
+		},
+		{
+			name: "is-set should return true for all bits",
+			init: allSet,
+			exec: func(fdSet *WinSockFdSet) {
+				for i := 0; i < fdSet.Count(); i++ {
+					require.True(t, fdSet.IsSet(i))
+				}
+			},
+			expected: allSet,
+		},
+		{
+			name: "is-set should return true for all odd bits",
+			init: WinSockFdSet{},
+			exec: func(fdSet *WinSockFdSet) {
+				for fd := 1; fd < _FD_SETSIZE; fd += 2 {
+					fdSet.Set(fd)
+				}
+				for fd := 0; fd < _FD_SETSIZE; fd++ {
+					isSet := fdSet.IsSet(fd)
+					if fd&0x1 == 0x1 {
+						require.True(t, isSet)
+					} else {
+						require.False(t, isSet)
+					}
+				}
+				fdSet.Zero()
+			},
+			expected: WinSockFdSet{},
+		},
+		{
+			name: "should clear all even bits",
+			init: allSet,
+			exec: func(fdSet *WinSockFdSet) {
+				for fd := 0; fd < _FD_SETSIZE; fd += 2 {
+					fdSet.Clear(fd)
+				}
+				for fd := 0; fd < _FD_SETSIZE; fd++ {
+					isSet := fdSet.IsSet(fd)
+					if fd&0x1 == 0x1 {
+						require.True(t, isSet)
+					} else {
+						require.False(t, isSet)
+					}
+				}
+				fdSet.Zero()
+			},
+			expected: WinSockFdSet{},
+		},
+	}
+
+	for _, tt := range tests {
+		tc := tt
+		t.Run(tc.name, func(t *testing.T) {
+			x := tc.init
+			tc.exec(&x)
+			require.Equal(t, tc.expected, x)
+		})
+	}
+}
diff --git a/internal/sysfs/select_windows.go b/internal/sysfs/select_windows.go
index af104d4d77..a0f58c3c14 100644
--- a/internal/sysfs/select_windows.go
+++ b/internal/sysfs/select_windows.go
@@ -109,7 +109,6 @@ func selectAllHandles(ctx context.Context, r, w, e *platform.FdSet, duration *ti
 			}
 		}
 	}
-
 }
 
 func peekAllHandles(r, w, e *platform.FdSet) (int, sys.Errno) {