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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.slime;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;
import static com.yahoo.slime.BinaryView.byte_offset_for_testing;
import static com.yahoo.slime.BinaryView.first_child_for_testing;
import static com.yahoo.slime.BinaryView.ext_bits_for_testing;
public class DecodeIndexTest {
int checkCapacity(DecodeIndex index, int oldCapacity) {
int capacity = index.capacity();
if (oldCapacity == -1) {
System.out.println("DecodeIndex initial capacity " + capacity);
} else if (capacity != oldCapacity) {
System.out.println("DecodeIndex capacity increased to " + capacity);
}
return capacity;
}
@Test
public void testSimpleUsage() {
DecodeIndex index = new DecodeIndex(100, 10);
assertEquals(1, index.size());
int capacity = checkCapacity(index, -1);
int root = 0;
capacity = checkCapacity(index, capacity);
int val2 = index.tryReserveChildren(3, 1, 15);
capacity = checkCapacity(index, capacity);
int val3 = index.tryReserveChildren(2, 2, 20);
capacity = checkCapacity(index, capacity);
assertEquals(1, val2);
assertEquals(4, val3);
assertEquals(6, index.size());
index.set(root, 0, val2, 0);
index.set(val2 + 0, 100, 0, 1);
index.set(val2 + 1, 200, val3, 2);
index.set(val2 + 2, 300, 0, 3);
index.set(val3 + 0, 400, 0, 0);
index.set(val3 + 1, 500, 0, 0);
for (int i = 0; i < 6; i++) {
assertEquals(i * 100, byte_offset_for_testing(index, i));
if (i == 0) {
assertEquals(1, first_child_for_testing(index, i));
} else if (i == 2) {
assertEquals(4, first_child_for_testing(index, i));
} else {
assertEquals(0, first_child_for_testing(index, i));
}
if (i < 4) {
assertEquals(i, ext_bits_for_testing(index, i));
} else {
assertEquals(0, ext_bits_for_testing(index, i));
}
}
}
@Test
public void testManyValues() {
int outer = 47;
int inner = 73;
int symSize = 128;
int bytesPerValue = 5;
DecodeIndex index = new DecodeIndex(symSize + inner * outer * bytesPerValue, symSize);
int capacity = checkCapacity(index, -1);
int indexOffset = 1;
int binaryOffset = symSize + bytesPerValue;
int expectOffset = 1;
for (int i = 0; i < outer; i++) {
int offset = index.tryReserveChildren(inner, indexOffset, binaryOffset);
capacity = checkCapacity(index, capacity);
assertEquals(expectOffset, offset);
expectOffset += inner;
for (int j = 0; j < inner; j++) {
index.set(offset + j, (i * j), (i + j), (j & 3));
++indexOffset;
binaryOffset += bytesPerValue;
}
}
assertEquals(1 + inner * outer, expectOffset);
assertEquals(1 + inner * outer, index.size());
for (int i = 0; i < outer; i++) {
for (int j = 0; j < inner; j++) {
int offset = 1 + i * inner + j;
assertEquals(i * j, byte_offset_for_testing(index, offset));
assertEquals(i + j, first_child_for_testing(index, offset));
assertEquals(j & 3, ext_bits_for_testing(index, offset));
}
}
}
@Test
public void testOverflowNoBleed() {
DecodeIndex index = new DecodeIndex(100, 10);
index.tryReserveChildren(2, 1, 20);
assertEquals(3, index.size());
index.set(0, 0xffff_ffff, 0, 0);
index.set(1, 0, 0xffff_ffff, 0);
index.set(2, 0, 0, 0xffff_ffff);
assertEquals(0x7fff_ffff, byte_offset_for_testing(index, 0));
assertEquals(0, byte_offset_for_testing(index, 1));
assertEquals(0, byte_offset_for_testing(index, 2));
assertEquals(0, first_child_for_testing(index, 0));
assertEquals(0x7fff_ffff, first_child_for_testing(index, 1));
assertEquals(0, first_child_for_testing(index, 2));
assertEquals(0, ext_bits_for_testing(index, 0));
assertEquals(0, ext_bits_for_testing(index, 1));
assertEquals(3, ext_bits_for_testing(index, 2));
}
@Test
public void testMinimalInitialCapacity() {
DecodeIndex index = new DecodeIndex(2, 1);
assertEquals(16, index.capacity());
}
@Test
public void testInitialCapacityEstimate() {
DecodeIndex index = new DecodeIndex((33 * 24) + 167, 167);
assertEquals(33, index.capacity());
}
void assertWithinRange(int low, int high, int actual) {
if (actual >= low && actual <= high) {
System.out.println("value " + actual + " in range [" + low + "," + high + "]");
} else {
fail("value " + actual + " not in range [" + low + "," + high + "]");
}
}
void assertGreater(int limit, int actual) {
if (actual > limit) {
System.out.println("value " + actual + " is greater than " + limit);
} else {
fail("value " + actual + " is not greater than " + limit);
}
}
void assertLess(int limit, int actual) {
if (actual < limit) {
System.out.println("value " + actual + " is less than " + limit);
} else {
fail("value " + actual + " is not less than " + limit);
}
}
DecodeIndex prepareIndex(int symSize, int numValues) {
DecodeIndex index = new DecodeIndex((numValues * 24) + symSize, symSize);
assertEquals(1, index.tryReserveChildren(numValues - 1, 1, symSize + 24));
assertEquals(numValues, index.size());
assertEquals(numValues, index.capacity());
return index;
}
@Test
public void testDensityBasedCapacityEstimate() {
var index = prepareIndex(167, 33);
double exp = 1.25 * index.capacity();
assertEquals(33, index.tryReserveChildren(10, 20, 167 + (20 * 4)));
int doneCnt = 20;
double bytesPerObject = 4.0;
int pendingData = (33 * 24) - (20 * 4);
double est = (doneCnt + pendingData / bytesPerObject);
int maxSize = doneCnt + pendingData;
assertGreater((int)(exp * 1.05), index.capacity());
assertWithinRange((int)(1.05 * est), (int)(1.15 * est), index.capacity());
assertLess(maxSize, index.capacity());
}
@Test
public void testExpCapacityGrowth() {
var index = prepareIndex(167, 33);
double exp = 1.25 * index.capacity();
assertEquals(33, index.tryReserveChildren(1, 20, 167 + (20 * 32)));
int doneCnt = 20;
double bytesPerObject = 32.0;
int pendingData = (33 * 24) - (20 * 32);
double est = (doneCnt + pendingData / bytesPerObject);
int maxSize = doneCnt + pendingData;
assertWithinRange((int)(0.95 * exp), (int)(1.05 * exp), index.capacity());
assertGreater((int)(est * 1.15), index.capacity());
assertLess(maxSize, index.capacity());
}
@Test
public void testMinCapacityGrowth() {
var index = prepareIndex(167, 33);
double exp = 1.25 * index.capacity();
assertEquals(33, index.tryReserveChildren(20, 20, 167 + (20 * 32)));
int doneCnt = 20;
double bytesPerObject = 32.0;
int pendingData = (33 * 24) - (20 * 32);
double est = (doneCnt + pendingData / bytesPerObject);
int maxSize = doneCnt + pendingData;
assertGreater((int)(exp * 1.05), index.capacity());
assertGreater((int)(est * 1.15), index.capacity());
assertEquals(33 + 20, index.capacity());
assertLess(maxSize, index.capacity());
}
@Test
public void testMaxCapacityGrowth() {
var index = prepareIndex(167, 33);
double exp = 1.25 * index.capacity();
assertEquals(33, index.tryReserveChildren(1, 32, 167 + (33 * 24) - 3));
int minSize = 33 + 1;
int maxSize = 32 + 3;
assertLess((int)(exp * 0.95), index.capacity());
assertGreater(minSize, index.capacity());
assertEquals(maxSize, index.capacity());
}
@Test
public void testMinMaxCapacityGrowth() {
var index = prepareIndex(167, 33);
assertEquals(-1, index.tryReserveChildren(5, 32, 167 + (33 * 24) - 3));
assertEquals(33, index.capacity());
}
@Test
public void testExpNanCapacityGrowth() {
var index = prepareIndex(167, 33);
double exp = 1.25 * index.capacity();
assertEquals(33, index.tryReserveChildren(1, 0, 167));
assertWithinRange((int)(0.95 * exp), (int)(1.05 * exp), index.capacity());
}
@Test
public void testMaxInfCapacityGrowth() {
var index = prepareIndex(167, 17);
double exp = 1.25 * index.capacity();
assertEquals(17, index.tryReserveChildren(1, 10, 167));
int maxSize = 10 + (17 * 24);
assertEquals(maxSize, index.capacity());
}
}
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