/***********************************************************************************************************************
* Copyright (C) 2010-2013 by the Stratosphere project (http://stratosphere.eu)
*
* 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 eu.stratosphere.types;
import junit.framework.Assert;
import org.junit.Test;
import eu.stratosphere.core.memory.MemorySegment;
public class NormalizableKeyTest {
@Test
public void testIntValue() {
IntValue int0 = new IntValue(10);
IntValue int1 = new IntValue(10);
IntValue int2 = new IntValue(-10);
IntValue int3 = new IntValue(255);
IntValue int4 = new IntValue(Integer.MAX_VALUE);
IntValue int5 = new IntValue(Integer.MAX_VALUE & 0xff800000);
IntValue int6 = new IntValue(Integer.MIN_VALUE);
IntValue int7 = new IntValue(Integer.MIN_VALUE & 0xff800000);
for (int length = 2; length <= 4; length++) {
assertNormalizableKey(int0, int1, length);
assertNormalizableKey(int0, int2, length);
assertNormalizableKey(int0, int3, length);
assertNormalizableKey(int0, int4, length);
assertNormalizableKey(int0, int5, length);
assertNormalizableKey(int0, int6, length);
assertNormalizableKey(int0, int7, length);
assertNormalizableKey(int4, int5, length);
assertNormalizableKey(int6, int7, length);
}
}
@Test
public void testLongValue() {
LongValue long0 = new LongValue(10);
LongValue long1 = new LongValue(10);
LongValue long2 = new LongValue(-10);
LongValue long3 = new LongValue(255);
LongValue long4 = new LongValue(Long.MAX_VALUE);
LongValue long5 = new LongValue(Long.MAX_VALUE & 0xff80000000000000L);
LongValue long6 = new LongValue(Long.MIN_VALUE);
LongValue long7 = new LongValue(Long.MIN_VALUE & 0xff80000000000000L);
for (int length = 2; length <= 8; length++) {
assertNormalizableKey(long0, long1, length);
assertNormalizableKey(long0, long2, length);
assertNormalizableKey(long0, long3, length);
assertNormalizableKey(long0, long4, length);
assertNormalizableKey(long0, long5, length);
assertNormalizableKey(long0, long6, length);
assertNormalizableKey(long0, long7, length);
assertNormalizableKey(long4, long5, length);
assertNormalizableKey(long6, long7, length);
}
}
@Test
public void testStringValue() {
StringValue string0 = new StringValue("This is a test");
StringValue string1 = new StringValue("This is a test with some longer String");
StringValue string2 = new StringValue("This is a tesa");
StringValue string3 = new StringValue("This");
StringValue string4 = new StringValue("Ünlaut ßtring ยต avec é y ¢");
for (int length = 5; length <= 15; length+=10) {
assertNormalizableKey(string0, string1, length);
assertNormalizableKey(string0, string2, length);
assertNormalizableKey(string0, string3, length);
assertNormalizableKey(string0, string4, length);
}
}
@Test
public void testPactNull() {
final NullValue pn1 = new NullValue();
final NullValue pn2 = new NullValue();
assertNormalizableKey(pn1, pn2, 0);
}
@Test
public void testPactChar() {
final CharValue c1 = new CharValue((char) 0);
final CharValue c2 = new CharValue((char) 1);
final CharValue c3 = new CharValue((char) 0xff);
final CharValue c4 = new CharValue(Character.MAX_VALUE);
final CharValue c5 = new CharValue((char) (Character.MAX_VALUE + (char) 1));
final CharValue c6 = new CharValue(Character.MAX_HIGH_SURROGATE);
final CharValue c7 = new CharValue(Character.MAX_LOW_SURROGATE);
final CharValue c8 = new CharValue(Character.MAX_SURROGATE);
CharValue[] allChars = new CharValue[] {
c1, c2, c3, c4, c5, c6, c7, c8 };
for (int i = 0; i < 5; i++) {
// self checks
for (int x = 0; x < allChars.length; x++) {
for (int y = 0; y < allChars.length; y++) {
assertNormalizableKey(allChars[x], allChars[y], i);
}
}
}
}
@SuppressWarnings("unchecked")
private <T extends Comparable<T>> void assertNormalizableKey(NormalizableKey<T> key1, NormalizableKey<T> key2, int len) {
byte[] normalizedKeys = new byte[2*len];
MemorySegment wrapper = new MemorySegment(normalizedKeys);
key1.copyNormalizedKey(wrapper, 0, len);
key2.copyNormalizedKey(wrapper, len, len);
for (int i = 0; i < len; i++) {
int comp;
int normKey1 = normalizedKeys[i] & 0xFF;
int normKey2 = normalizedKeys[len + i] & 0xFF;
if ((comp = (normKey1 - normKey2)) != 0) {
if (Math.signum(((T) key1).compareTo((T) key2)) != Math.signum(comp)) {
Assert.fail("Normalized key comparison differs from actual key comparision");
}
return;
}
}
if (((T) key1).compareTo((T) key2) != 0 && key1.getMaxNormalizedKeyLen() <= len) {
Assert.fail("Normalized key was not able to distinguish keys, " +
"although it should as the length of it sufficies to uniquely identify them");
}
}
}