80 lines
2.7 KiB
Java
80 lines
2.7 KiB
Java
package it.cavallium.dbengine.tests;
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import it.cavallium.dbengine.buffers.Buf;
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import it.cavallium.dbengine.database.LLUtils;
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import it.cavallium.dbengine.database.collections.DatabaseMapDictionaryDeep;
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import java.util.Arrays;
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import org.junit.jupiter.api.AfterAll;
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import org.junit.jupiter.api.Assertions;
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import org.junit.jupiter.api.BeforeAll;
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import org.junit.jupiter.api.Test;
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public class TestRanges {
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@BeforeAll
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public static void beforeAll() {
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}
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@AfterAll
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public static void afterAll() {
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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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Buf firstRangeKeyBuf = Buf.create(prefixKey.length);
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firstRangeKeyBuf.addElements(0, prefixKey);
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firstRangeKeyBuf = DatabaseMapDictionaryDeep.firstRangeKey(firstRangeKeyBuf, prefixKey.length, Buf.createZeroes(7 + 3));
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firstRangeKey = firstRangeKeyBuf.asArray();
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byte[] nextRangeKey;
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Buf nextRangeKeyBuf = Buf.create(prefixKey.length);
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nextRangeKeyBuf.addElements(0, prefixKey);
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nextRangeKeyBuf = DatabaseMapDictionaryDeep.nextRangeKey(nextRangeKeyBuf, prefixKey.length, Buf.createZeroes(7 + 3));
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nextRangeKey = nextRangeKeyBuf.asArray();
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if (Arrays.equals(prefixKey, new byte[] {(byte) 0xFF, (byte) 0xFF, (byte) 0xFF})) {
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org.assertj.core.api.Assertions
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.assertThat(nextRangeKey)
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.isEqualTo(new byte[]{(byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF,
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(byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, 0});
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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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