tests: Port kubelet tests to Windows

Ports kubelet/util unit tests to Windows.

pkg/kubelet/util/util_unix_test.go

@@ -20,12 +20,9 @@ limitations under the License.
 package util
 
 import (
-	"net"
-	"os"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
-	"github.com/stretchr/testify/require"
 )
 
 func TestParseEndpoint(t *testing.T) {
@@ -74,66 +71,6 @@ func TestParseEndpoint(t *testing.T) {
 
 }
 
-func TestIsUnixDomainSocket(t *testing.T) {
-	tests := []struct {
-		label          string
-		listenOnSocket bool
-		expectSocket   bool
-		expectError    bool
-		invalidFile    bool
-	}{
-		{
-			label:          "Domain Socket file",
-			listenOnSocket: true,
-			expectSocket:   true,
-			expectError:    false,
-		},
-		{
-			label:       "Non Existent file",
-			invalidFile: true,
-			expectError: true,
-		},
-		{
-			label:          "Regular file",
-			listenOnSocket: false,
-			expectSocket:   false,
-			expectError:    false,
-		},
-	}
-	for _, test := range tests {
-		f, err := os.CreateTemp("", "test-domain-socket")
-		require.NoErrorf(t, err, "Failed to create file for test purposes: %v while setting up: %s", err, test.label)
-		addr := f.Name()
-		f.Close()
-		var ln *net.UnixListener
-		if test.listenOnSocket {
-			os.Remove(addr)
-			ta, err := net.ResolveUnixAddr("unix", addr)
-			require.NoErrorf(t, err, "Failed to ResolveUnixAddr: %v while setting up: %s", err, test.label)
-			ln, err = net.ListenUnix("unix", ta)
-			require.NoErrorf(t, err, "Failed to ListenUnix: %v while setting up: %s", err, test.label)
-		}
-		fileToTest := addr
-		if test.invalidFile {
-			fileToTest = fileToTest + ".invalid"
-		}
-		result, err := IsUnixDomainSocket(fileToTest)
-		if test.listenOnSocket {
-			// this takes care of removing the file associated with the domain socket
-			ln.Close()
-		} else {
-			// explicitly remove regular file
-			os.Remove(addr)
-		}
-		if test.expectError {
-			assert.NotNil(t, err, "Unexpected nil error from IsUnixDomainSocket for %s", test.label)
-		} else {
-			assert.Nil(t, err, "Unexpected error invoking IsUnixDomainSocket for %s", test.label)
-		}
-		assert.Equal(t, result, test.expectSocket, "Unexpected result from IsUnixDomainSocket: %v for %s", result, test.label)
-	}
-}
-
 func TestGetAddressAndDialer(t *testing.T) {
 	tests := []struct {
 		endpoint     string