exp/ssh: add client functional tests

Requires CL 5373055

R=rsc, agl, n13m3y3r
CC=golang-dev
https://golang.org/cl/5320053

src/pkg/exp/ssh/client_func_test.go

+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ssh
+
+// ClientConn functional tests.
+// These tests require a running ssh server listening on port 22
+// on the local host. Functional tests will be skipped unless 
+// -ssh.user and -ssh.pass must be passed to gotest.
+
+import (
+	"flag"
+	"testing"
+)
+
+var (
+	sshuser    = flag.String("ssh.user", "", "ssh username")
+	sshpass    = flag.String("ssh.pass", "", "ssh password")
+	sshprivkey = flag.String("ssh.privkey", "", "ssh privkey file")
+)
+
+func TestFuncPasswordAuth(t *testing.T) {
+	if *sshuser == "" {
+		t.Log("ssh.user not defined, skipping test")
+		return
+	}
+	config := &ClientConfig{
+		User: *sshuser,
+		Auth: []ClientAuth{
+			ClientAuthPassword(password(*sshpass)),
+		},
+	}
+	conn, err := Dial("tcp", "localhost:22", config)
+	if err != nil {
+		t.Fatalf("Unable to connect: %s", err)
+	}
+	defer conn.Close()
+}
+
+func TestFuncPublickeyAuth(t *testing.T) {
+	if *sshuser == "" {
+		t.Log("ssh.user not defined, skipping test")
+		return
+	}
+	kc := new(keychain)
+	if err := kc.loadPEM(*sshprivkey); err != nil {
+		t.Fatalf("unable to load private key: %s", err)
+	}
+	config := &ClientConfig{
+		User: *sshuser,
+		Auth: []ClientAuth{
+			ClientAuthPublickey(kc),
+		},
+	}
+	conn, err := Dial("tcp", "localhost:22", config)
+	if err != nil {
+		t.Fatalf("unable to connect: %s", err)
+	}
+	defer conn.Close()
+}