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

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+/*
+ *
+ * Copyright 2014, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+package grpc
+
+import (
+	"bytes"
+	"sync"
+	"testing"
+
+	"google.golang.org/grpc/test/codec_perf"
+)
+
+func marshalAndUnmarshal(t *testing.T, protoCodec Codec, expectedBody []byte) {
+	p := &codec_perf.Buffer{}
+	p.Body = expectedBody
+
+	marshalledBytes, err := protoCodec.Marshal(p)
+	if err != nil {
+		t.Errorf("protoCodec.Marshal(_) returned an error")
+	}
+
+	if err := protoCodec.Unmarshal(marshalledBytes, p); err != nil {
+		t.Errorf("protoCodec.Unmarshal(_) returned an error")
+	}
+
+	if bytes.Compare(p.GetBody(), expectedBody) != 0 {
+		t.Errorf("Unexpected body; got %v; want %v", p.GetBody(), expectedBody)
+	}
+}
+
+func TestBasicProtoCodecMarshalAndUnmarshal(t *testing.T) {
+	marshalAndUnmarshal(t, protoCodec{}, []byte{1, 2, 3})
+}
+
+// Try to catch possible race conditions around use of pools
+func TestConcurrentUsage(t *testing.T) {
+	const (
+		numGoRoutines   = 100
+		numMarshUnmarsh = 1000
+	)
+
+	// small, arbitrary byte slices
+	protoBodies := [][]byte{
+		[]byte("one"),
+		[]byte("two"),
+		[]byte("three"),
+		[]byte("four"),
+		[]byte("five"),
+	}
+
+	var wg sync.WaitGroup
+	codec := protoCodec{}
+
+	for i := 0; i < numGoRoutines; i++ {
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			for k := 0; k < numMarshUnmarsh; k++ {
+				marshalAndUnmarshal(t, codec, protoBodies[k%len(protoBodies)])
+			}
+		}()
+	}
+
+	wg.Wait()
+}
+
+// TestStaggeredMarshalAndUnmarshalUsingSamePool tries to catch potential errors in which slices get
+// stomped on during reuse of a proto.Buffer.
+func TestStaggeredMarshalAndUnmarshalUsingSamePool(t *testing.T) {
+	codec1 := protoCodec{}
+	codec2 := protoCodec{}
+
+	expectedBody1 := []byte{1, 2, 3}
+	expectedBody2 := []byte{4, 5, 6}
+
+	proto1 := codec_perf.Buffer{Body: expectedBody1}
+	proto2 := codec_perf.Buffer{Body: expectedBody2}
+
+	var m1, m2 []byte
+	var err error
+
+	if m1, err = codec1.Marshal(&proto1); err != nil {
+		t.Errorf("protoCodec.Marshal(%v) failed", proto1)
+	}
+
+	if m2, err = codec2.Marshal(&proto2); err != nil {
+		t.Errorf("protoCodec.Marshal(%v) failed", proto2)
+	}
+
+	if err = codec1.Unmarshal(m1, &proto1); err != nil {
+		t.Errorf("protoCodec.Unmarshal(%v) failed", m1)
+	}
+
+	if err = codec2.Unmarshal(m2, &proto2); err != nil {
+		t.Errorf("protoCodec.Unmarshal(%v) failed", m2)
+	}
+
+	b1 := proto1.GetBody()
+	b2 := proto2.GetBody()
+
+	for i, v := range b1 {
+		if expectedBody1[i] != v {
+			t.Errorf("expected %v at index %v but got %v", i, expectedBody1[i], v)
+		}
+	}
+
+	for i, v := range b2 {
+		if expectedBody2[i] != v {
+			t.Errorf("expected %v at index %v but got %v", i, expectedBody2[i], v)
+		}
+	}
+}