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// Protocol Buffers - Google's data interchange format
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// Copyright 2008 Google Inc. All rights reserved.
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// http://code.google.com/p/protobuf/
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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package com.google.protobuf;
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import protobuf_unittest.UnittestProto;
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import junit.framework.TestCase;
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import java.io.IOException;
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* Tests to make sure the lazy conversion of UTF8-encoded byte arrays to
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* strings works correctly.
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* @author jonp@google.com (Jon Perlow)
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public class LazyStringEndToEndTest extends TestCase {
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private static ByteString TEST_ALL_TYPES_SERIALIZED_WITH_ILLEGAL_UTF8 =
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ByteString.copyFrom(new byte[] {
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114, 4, -1, 0, -1, 0, -30, 2, 4, -1,
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0, -1, 0, -30, 2, 4, -1, 0, -1, 0, });
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* Tests that an invalid UTF8 string will roundtrip through a parse
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public void testParseAndSerialize() throws InvalidProtocolBufferException {
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UnittestProto.TestAllTypes tV2 = UnittestProto.TestAllTypes.parseFrom(
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TEST_ALL_TYPES_SERIALIZED_WITH_ILLEGAL_UTF8);
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ByteString bytes = tV2.toByteString();
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assertEquals(TEST_ALL_TYPES_SERIALIZED_WITH_ILLEGAL_UTF8, bytes);
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tV2.getOptionalString();
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bytes = tV2.toByteString();
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assertEquals(TEST_ALL_TYPES_SERIALIZED_WITH_ILLEGAL_UTF8, bytes);
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public void testParseAndWrite() throws IOException {
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UnittestProto.TestAllTypes tV2 = UnittestProto.TestAllTypes.parseFrom(
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TEST_ALL_TYPES_SERIALIZED_WITH_ILLEGAL_UTF8);
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byte[] sink = new byte[TEST_ALL_TYPES_SERIALIZED_WITH_ILLEGAL_UTF8.size()];
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CodedOutputStream outputStream = CodedOutputStream.newInstance(sink);
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tV2.writeTo(outputStream);
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TEST_ALL_TYPES_SERIALIZED_WITH_ILLEGAL_UTF8,
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ByteString.copyFrom(sink));
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public void testCaching() {
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UnittestProto.TestAllTypes proto = UnittestProto.TestAllTypes.newBuilder()
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// String should be the one we passed it.
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assertSame(a, proto.getOptionalString());
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assertSame(b, proto.getRepeatedString(0));
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assertSame(c, proto.getRepeatedString(1));
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// There's no way to directly observe that the ByteString is cached
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// correctly on serialization, but we can observe that it had to recompute
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// the string after serialization.
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String aPrime = proto.getOptionalString();
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assertNotSame(a, aPrime);
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assertEquals(a, aPrime);
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String bPrime = proto.getRepeatedString(0);
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assertNotSame(b, bPrime);
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assertEquals(b, bPrime);
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String cPrime = proto.getRepeatedString(1);
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assertNotSame(c, cPrime);
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assertEquals(c, cPrime);
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// And now the string should stay cached.
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assertSame(aPrime, proto.getOptionalString());
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assertSame(bPrime, proto.getRepeatedString(0));
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assertSame(cPrime, proto.getRepeatedString(1));