Butler stream servers can generate client address.

logdog/client/butler/streamserver/namedPipe_windows_test.go

Index: logdog/client/butler/streamserver/namedPipe_windows_test.go
diff --git a/logdog/client/butler/streamserver/namedPipe_windows_test.go b/logdog/client/butler/streamserver/namedPipe_windows_test.go
new file mode 100644
index 0000000000000000000000000000000000000000..f056ffba1504b6f230334f0384f0bce70ef2ceea
--- /dev/null
+++ b/logdog/client/butler/streamserver/namedPipe_windows_test.go
@@ -0,0 +1,52 @@
+// Copyright 2017 The LUCI Authors. All rights reserved.
+// Use of this source code is governed under the Apache License, Version 2.0
+// that can be found in the LICENSE file.
+
+package streamserver
+
+import (
+	"fmt"
+	"os"
+	"strings"
+	"testing"
+
+	"github.com/luci/luci-go/logdog/client/butlerlib/streamclient"
+
+	"golang.org/x/net/context"
+
+	. "github.com/luci/luci-go/common/testing/assertions"
+	. "github.com/smartystreets/goconvey/convey"
+)
+
+func TestWindowsNamedPipeServer(t *testing.T) {
+	t.Parallel()
+
+	pid := os.Getpid()
+
+	Convey(`A named pipe server`, t, func() {
+		ctx := context.Background()
+
+		Convey(`Will refuse to create if there is an empty path.`, func() {
+			_, err := NewNamedPipeServer(ctx, "")
+			So(err, ShouldErrLike, "cannot have empty name")
+		})
+
+		Convey(`Will refuse to create if longer than maximum length.`, func() {
+			_, err := NewNamedPipeServer(ctx, strings.Repeat("A", maxWindowsNamedPipeLength+1))
+			So(err, ShouldErrLike, "name exceeds maximum length")
+		})
+
+		Convey(`When created and listening.`, func() {
+			svr, err := NewNamedPipeServer(ctx, fmt.Sprintf("ButlerNamedPipeTest_%d", pid))
+			So(err, ShouldBeNil)
+
+			So(svr.Listen(), ShouldBeNil)
+			defer svr.Close()
+
+			client, err := streamclient.New(svr.Address())
+			So(err, ShouldBeNil)
+
+			testClientServer(t, svr, client)
+		})
+	})
+}