Test for !Windows instead excluding several Unix-flavors

Cf. #34633 (comment)

Author: gfoidl

src/libraries/System.Net.NameResolution/tests/PalTests/NameResolutionPalTests.cs

@@ -51,7 +51,7 @@ public void TryGetAddrInfo_LocalHost(bool justAddresses)
         public void TryGetAddrInfo_EmptyHost(bool justAddresses)
         {
             SocketError error = NameResolutionPal.TryGetAddrInfo("", justAddresses, AddressFamily.Unspecified, out string hostName, out string[] aliases, out IPAddress[] addresses, out int nativeErrorCode);
-            if (error == SocketError.HostNotFound && (OperatingSystem.IsLinux() || OperatingSystem.IsMacOS()))
+            if (error == SocketError.HostNotFound && !OperatingSystem.IsWindows())
             {
                 // On Unix, we are not guaranteed to be able to resove the local host. The ability to do so depends on the
                 // machine configurations, which varies by distro and is often inconsistent.
@@ -78,7 +78,7 @@ public void TryGetAddrInfo_HostName(bool justAddresses)
             Assert.NotNull(hostName);
 
             SocketError error = NameResolutionPal.TryGetAddrInfo(hostName, justAddresses, AddressFamily.Unspecified, out hostName, out string[] aliases, out IPAddress[] addresses, out int nativeErrorCode);
-            if (error == SocketError.HostNotFound && (OperatingSystem.IsLinux() || OperatingSystem.IsMacOS()))
+            if (error == SocketError.HostNotFound && !OperatingSystem.IsWindows())
             {
                 // On Unix, we are not guaranteed to be able to resove the local host. The ability to do so depends on the
                 // machine configurations, which varies by distro and is often inconsistent.
@@ -289,7 +289,7 @@ public async Task GetAddrInfoAsync_EmptyHost(bool justAddresses)
             {
                 SocketError error = ex.SocketErrorCode;
 
-                if (error == SocketError.HostNotFound && (OperatingSystem.IsLinux() || OperatingSystem.IsMacOS()))
+                if (error == SocketError.HostNotFound && !OperatingSystem.IsWindows())
                 {
                     // On Unix, we are not guaranteed to be able to resove the local host. The ability to do so depends on the
                     // machine configurations, which varies by distro and is often inconsistent.
@@ -339,7 +339,7 @@ public async Task GetAddrInfoAsync_HostName(bool justAddresses)
             {
                 SocketError error = ex.SocketErrorCode;
 
-                if (error == SocketError.HostNotFound && (OperatingSystem.IsLinux() || OperatingSystem.IsMacOS()))
+                if (error == SocketError.HostNotFound && !OperatingSystem.IsWindows())
                 {
                     // On Unix, we are not guaranteed to be able to resove the local host. The ability to do so depends on the
                     // machine configurations, which varies by distro and is often inconsistent.