Fixes some unit tests to be able to run them on windows

Some of them are skipped for now (because the feature is not supported
or needs more work), some of them are fixed.

Signed-off-by: Vincent Demeester <vincent@sbr.pm>
(cherry picked from commit 0cf2e6353a)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

components/cli/cli/command/cli_test.go

@@ -3,6 +3,7 @@ package command
 import (
 	"crypto/x509"
 	"os"
+	"runtime"
 	"testing"
 
 	cliconfig "github.com/docker/cli/cli/config"
@@ -20,6 +21,9 @@ import (
 
 func TestNewAPIClientFromFlags(t *testing.T) {
 	host := "unix://path"
+	if runtime.GOOS == "windows" {
+		host = "npipe://./"
+	}
 	opts := &flags.CommonOptions{Hosts: []string{host}}
 	configFile := &configfile.ConfigFile{
 		HTTPHeaders: map[string]string{