update to use containerd seccomp package

Signed-off-by: Jess Frazelle <acidburn@microsoft.com>

vendor/google.golang.org/grpc/picker_wrapper_test.go

@@ -0,0 +1,160 @@
+/*
+ *
+ * Copyright 2017 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package grpc
+
+import (
+	"fmt"
+	"sync/atomic"
+	"testing"
+	"time"
+
+	"golang.org/x/net/context"
+	"google.golang.org/grpc/balancer"
+	"google.golang.org/grpc/connectivity"
+	_ "google.golang.org/grpc/grpclog/glogger"
+	"google.golang.org/grpc/test/leakcheck"
+	"google.golang.org/grpc/transport"
+)
+
+const goroutineCount = 5
+
+var (
+	testT  = &testTransport{}
+	testSC = &acBalancerWrapper{ac: &addrConn{
+		state:     connectivity.Ready,
+		transport: testT,
+	}}
+	testSCNotReady = &acBalancerWrapper{ac: &addrConn{
+		state: connectivity.TransientFailure,
+	}}
+)
+
+type testTransport struct {
+	transport.ClientTransport
+}
+
+type testingPicker struct {
+	err       error
+	sc        balancer.SubConn
+	maxCalled int64
+}
+
+func (p *testingPicker) Pick(ctx context.Context, opts balancer.PickOptions) (balancer.SubConn, func(balancer.DoneInfo), error) {
+	if atomic.AddInt64(&p.maxCalled, -1) < 0 {
+		return nil, nil, fmt.Errorf("Pick called to many times (> goroutineCount)")
+	}
+	if p.err != nil {
+		return nil, nil, p.err
+	}
+	return p.sc, nil, nil
+}
+
+func TestBlockingPickTimeout(t *testing.T) {
+	defer leakcheck.Check(t)
+	bp := newPickerWrapper()
+	ctx, cancel := context.WithTimeout(context.Background(), time.Millisecond)
+	defer cancel()
+	if _, _, err := bp.pick(ctx, true, balancer.PickOptions{}); err != context.DeadlineExceeded {
+		t.Errorf("bp.pick returned error %v, want DeadlineExceeded", err)
+	}
+}
+
+func TestBlockingPick(t *testing.T) {
+	defer leakcheck.Check(t)
+	bp := newPickerWrapper()
+	// All goroutines should block because picker is nil in bp.
+	var finishedCount uint64
+	for i := goroutineCount; i > 0; i-- {
+		go func() {
+			if tr, _, err := bp.pick(context.Background(), true, balancer.PickOptions{}); err != nil || tr != testT {
+				t.Errorf("bp.pick returned non-nil error: %v", err)
+			}
+			atomic.AddUint64(&finishedCount, 1)
+		}()
+	}
+	time.Sleep(50 * time.Millisecond)
+	if c := atomic.LoadUint64(&finishedCount); c != 0 {
+		t.Errorf("finished goroutines count: %v, want 0", c)
+	}
+	bp.updatePicker(&testingPicker{sc: testSC, maxCalled: goroutineCount})
+}
+
+func TestBlockingPickNoSubAvailable(t *testing.T) {
+	defer leakcheck.Check(t)
+	bp := newPickerWrapper()
+	var finishedCount uint64
+	bp.updatePicker(&testingPicker{err: balancer.ErrNoSubConnAvailable, maxCalled: goroutineCount})
+	// All goroutines should block because picker returns no sc available.
+	for i := goroutineCount; i > 0; i-- {
+		go func() {
+			if tr, _, err := bp.pick(context.Background(), true, balancer.PickOptions{}); err != nil || tr != testT {
+				t.Errorf("bp.pick returned non-nil error: %v", err)
+			}
+			atomic.AddUint64(&finishedCount, 1)
+		}()
+	}
+	time.Sleep(50 * time.Millisecond)
+	if c := atomic.LoadUint64(&finishedCount); c != 0 {
+		t.Errorf("finished goroutines count: %v, want 0", c)
+	}
+	bp.updatePicker(&testingPicker{sc: testSC, maxCalled: goroutineCount})
+}
+
+func TestBlockingPickTransientWaitforready(t *testing.T) {
+	defer leakcheck.Check(t)
+	bp := newPickerWrapper()
+	bp.updatePicker(&testingPicker{err: balancer.ErrTransientFailure, maxCalled: goroutineCount})
+	var finishedCount uint64
+	// All goroutines should block because picker returns transientFailure and
+	// picks are not failfast.
+	for i := goroutineCount; i > 0; i-- {
+		go func() {
+			if tr, _, err := bp.pick(context.Background(), false, balancer.PickOptions{}); err != nil || tr != testT {
+				t.Errorf("bp.pick returned non-nil error: %v", err)
+			}
+			atomic.AddUint64(&finishedCount, 1)
+		}()
+	}
+	time.Sleep(time.Millisecond)
+	if c := atomic.LoadUint64(&finishedCount); c != 0 {
+		t.Errorf("finished goroutines count: %v, want 0", c)
+	}
+	bp.updatePicker(&testingPicker{sc: testSC, maxCalled: goroutineCount})
+}
+
+func TestBlockingPickSCNotReady(t *testing.T) {
+	defer leakcheck.Check(t)
+	bp := newPickerWrapper()
+	bp.updatePicker(&testingPicker{sc: testSCNotReady, maxCalled: goroutineCount})
+	var finishedCount uint64
+	// All goroutines should block because sc is not ready.
+	for i := goroutineCount; i > 0; i-- {
+		go func() {
+			if tr, _, err := bp.pick(context.Background(), true, balancer.PickOptions{}); err != nil || tr != testT {
+				t.Errorf("bp.pick returned non-nil error: %v", err)
+			}
+			atomic.AddUint64(&finishedCount, 1)
+		}()
+	}
+	time.Sleep(time.Millisecond)
+	if c := atomic.LoadUint64(&finishedCount); c != 0 {
+		t.Errorf("finished goroutines count: %v, want 0", c)
+	}
+	bp.updatePicker(&testingPicker{sc: testSC, maxCalled: goroutineCount})
+}