2021-03-13 19:01:36 +01:00
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package it.cavallium.dbengine.database.collections;
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2021-09-17 16:56:28 +02:00
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import io.net5.buffer.Unpooled;
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import io.net5.buffer.api.Buffer;
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2021-09-17 16:56:28 +02:00
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import io.net5.buffer.api.BufferAllocator;
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import it.cavallium.dbengine.database.LLUtils;
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import java.util.Arrays;
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import org.junit.jupiter.api.AfterAll;
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2021-03-13 19:01:36 +01:00
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import org.junit.jupiter.api.Assertions;
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import org.junit.jupiter.api.BeforeAll;
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2021-03-13 19:01:36 +01:00
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import org.junit.jupiter.api.Test;
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2021-09-17 16:56:28 +02:00
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import static io.net5.buffer.Unpooled.*;
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public class TestRanges {
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private static BufferAllocator alloc;
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@BeforeAll
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public static void beforeAll() {
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alloc = BufferAllocator.offHeapPooled();
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}
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@AfterAll
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public static void afterAll() {
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alloc = BufferAllocator.offHeapPooled();
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}
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@Test
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public void testDirectBuffer() {
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Assertions.assertTrue(wrappedBuffer(Unpooled.directBuffer(10, 10), Unpooled.buffer(10, 10)).isDirect());
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}
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@Test
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public void testNextRangeKey() {
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testNextRangeKey(new byte[] {0x00, 0x00, 0x00});
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testNextRangeKey(new byte[] {0x00, 0x00, 0x01});
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testNextRangeKey(new byte[] {0x00, 0x00, 0x02});
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testNextRangeKey(new byte[] {0x00, 0x01, 0x02});
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testNextRangeKey(new byte[] {0x00, 0x00, (byte) 0xFF});
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testNextRangeKey(new byte[] {0x00, 0x01, (byte) 0xFF});
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testNextRangeKey(new byte[] {0x00, (byte) 0xFF, (byte) 0xFF});
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}
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@Test
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public void testNextRangeKey2() {
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testNextRangeKey(new byte[] {(byte) 0xFF, (byte) 0xFF, (byte) 0xFF});
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testNextRangeKey(new byte[] {(byte) 0xFF, (byte) 0, (byte) 0xFF});
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testNextRangeKey(new byte[] {(byte) 0xFF, (byte) 0xFF, (byte) 0});
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}
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public void testNextRangeKey(byte[] prefixKey) {
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byte[] firstRangeKey;
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Buffer firstRangeKeyBuf = alloc.allocate(prefixKey.length).writeBytes(prefixKey);
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try (firstRangeKeyBuf) {
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DatabaseMapDictionaryDeep.firstRangeKey(firstRangeKeyBuf, prefixKey.length, 7, 3);
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firstRangeKey = LLUtils.toArray(firstRangeKeyBuf);
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}
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byte[] nextRangeKey;
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Buffer nextRangeKeyBuf = alloc.allocate(prefixKey.length).writeBytes(prefixKey);
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try (nextRangeKeyBuf) {
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DatabaseMapDictionaryDeep.nextRangeKey(nextRangeKeyBuf, prefixKey.length, 7, 3);
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nextRangeKey = LLUtils.toArray(nextRangeKeyBuf);
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}
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if (Arrays.equals(prefixKey, new byte[] {(byte) 0xFF, (byte) 0xFF, (byte) 0xFF})) {
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Assertions.assertArrayEquals(new byte[] {(byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, 0}, nextRangeKey);
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} else {
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long biPrefix = 0;
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var s = 0;
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for (int i = prefixKey.length - 1; i >= 0; i--) {
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biPrefix += ((long) (prefixKey[i] & 0xFF)) << s;
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s += Byte.SIZE;
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}
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var nrPrefix = Arrays.copyOf(nextRangeKey, prefixKey.length);
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long biNextPrefix = 0;
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s = 0;
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for (int i = prefixKey.length - 1; i >= 0; i--) {
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biNextPrefix += ((long) (nrPrefix[i] & 0xFF)) << s;
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s += Byte.SIZE;
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}
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Assertions.assertEquals(biPrefix + 1, biNextPrefix);
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Assertions.assertArrayEquals(
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new byte[7 + 3],
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Arrays.copyOfRange(nextRangeKey, prefixKey.length, prefixKey.length + 7 + 3)
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);
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}
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}
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}
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