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// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc. All rights reserved.
// https://developers.google.com/protocol-buffers/
//
// 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 com.google.protobuf;
import junit.framework.TestCase;
import java.util.ArrayList;
import java.util.List;
/**
* Tests for {@link LazyStringArrayList}.
*
* @author jonp@google.com (Jon Perlow)
*/
public class LazyStringArrayListTest extends TestCase {
private static String STRING_A = "A";
private static String STRING_B = "B";
private static String STRING_C = "C";
private static ByteString BYTE_STRING_A = ByteString.copyFromUtf8("A");
private static ByteString BYTE_STRING_B = ByteString.copyFromUtf8("B");
private static ByteString BYTE_STRING_C = ByteString.copyFromUtf8("C");
public void testJustStrings() {
LazyStringArrayList list = new LazyStringArrayList();
list.add(STRING_A);
list.add(STRING_B);
list.add(STRING_C);
assertEquals(3, list.size());
assertSame(STRING_A, list.get(0));
assertSame(STRING_B, list.get(1));
assertSame(STRING_C, list.get(2));
list.set(1, STRING_C);
assertSame(STRING_C, list.get(1));
list.remove(1);
assertSame(STRING_A, list.get(0));
assertSame(STRING_C, list.get(1));
List<ByteString> byteStringList = list.asByteStringList();
assertEquals(BYTE_STRING_A, byteStringList.get(0));
assertEquals(BYTE_STRING_C, byteStringList.get(1));
// Underlying list should be transformed.
assertSame(byteStringList.get(0), list.getByteString(0));
assertSame(byteStringList.get(1), list.getByteString(1));
}
public void testJustByteString() {
LazyStringArrayList list = new LazyStringArrayList();
list.add(BYTE_STRING_A);
list.add(BYTE_STRING_B);
list.add(BYTE_STRING_C);
assertEquals(3, list.size());
assertSame(BYTE_STRING_A, list.getByteString(0));
assertSame(BYTE_STRING_B, list.getByteString(1));
assertSame(BYTE_STRING_C, list.getByteString(2));
list.remove(1);
assertSame(BYTE_STRING_A, list.getByteString(0));
assertSame(BYTE_STRING_C, list.getByteString(1));
List<ByteString> byteStringList = list.asByteStringList();
assertSame(BYTE_STRING_A, byteStringList.get(0));
assertSame(BYTE_STRING_C, byteStringList.get(1));
}
public void testConversionBackAndForth() {
LazyStringArrayList list = new LazyStringArrayList();
list.add(STRING_A);
list.add(BYTE_STRING_B);
list.add(BYTE_STRING_C);
// String a should be the same because it was originally a string
assertSame(STRING_A, list.get(0));
// String b and c should be different because the string has to be computed
// from the ByteString
String bPrime = list.get(1);
assertNotSame(STRING_B, bPrime);
assertEquals(STRING_B, bPrime);
String cPrime = list.get(2);
assertNotSame(STRING_C, cPrime);
assertEquals(STRING_C, cPrime);
// String c and c should stay the same once cached.
assertSame(bPrime, list.get(1));
assertSame(cPrime, list.get(2));
// ByteString needs to be computed from string for both a and b
ByteString aPrimeByteString = list.getByteString(0);
assertEquals(BYTE_STRING_A, aPrimeByteString);
ByteString bPrimeByteString = list.getByteString(1);
assertNotSame(BYTE_STRING_B, bPrimeByteString);
assertEquals(BYTE_STRING_B, list.getByteString(1));
// Once cached, ByteString should stay cached.
assertSame(aPrimeByteString, list.getByteString(0));
assertSame(bPrimeByteString, list.getByteString(1));
}
public void testCopyConstructorCopiesByReference() {
LazyStringArrayList list1 = new LazyStringArrayList();
list1.add(STRING_A);
list1.add(BYTE_STRING_B);
list1.add(BYTE_STRING_C);
LazyStringArrayList list2 = new LazyStringArrayList(list1);
assertEquals(3, list2.size());
assertSame(STRING_A, list2.get(0));
assertSame(BYTE_STRING_B, list2.getByteString(1));
assertSame(BYTE_STRING_C, list2.getByteString(2));
}
public void testListCopyConstructor() {
List<String> list1 = new ArrayList<String>();
list1.add(STRING_A);
list1.add(STRING_B);
list1.add(STRING_C);
LazyStringArrayList list2 = new LazyStringArrayList(list1);
assertEquals(3, list2.size());
assertSame(STRING_A, list2.get(0));
assertSame(STRING_B, list2.get(1));
assertSame(STRING_C, list2.get(2));
}
public void testAddAllCopiesByReferenceIfPossible() {
LazyStringArrayList list1 = new LazyStringArrayList();
list1.add(STRING_A);
list1.add(BYTE_STRING_B);
list1.add(BYTE_STRING_C);
LazyStringArrayList list2 = new LazyStringArrayList();
list2.addAll(list1);
assertEquals(3, list2.size());
assertSame(STRING_A, list2.get(0));
assertSame(BYTE_STRING_B, list2.getByteString(1));
assertSame(BYTE_STRING_C, list2.getByteString(2));
}
}
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