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using-ferification

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@hangga 2024-02-14 09:11:54 +07:00
parent ae80217d4f
commit 4395131ef0
2 changed files with 43 additions and 2 deletions
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2
core-java-modules/core-java-uuid/pom.xml
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@ -89,7 +89,7 @@
<source>${source.version}</source> <source>${source.version}</source>
<target>${target.version}</target> <target>${target.version}</target>
</configuration> </configuration>
</plugin> </plugin><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-compiler-plugin</artifactId><configuration><source>8</source><target>8</target></configuration></plugin>
</plugins> </plugins>
</build> </build>

43
core-java-modules/core-java-uuid/src/test/java/com/baeldung/uuid/UUIDPositiveLongGeneratorUnitTest.java
View File

@ -1,9 +1,12 @@
package com.baeldung.uuid; package com.baeldung.uuid;
import com.fasterxml.uuid.impl.UUIDUtil;
import org.junit.jupiter.api.Test; import org.junit.jupiter.api.Test;
import java.nio.ByteBuffer;
import java.util.UUID; import java.util.UUID;
import static org.apache.commons.io.IOUtils.byteArray;
import static org.assertj.core.api.Assertions.assertThat; import static org.assertj.core.api.Assertions.assertThat;
public class UUIDPositiveLongGeneratorUnitTest { public class UUIDPositiveLongGeneratorUnitTest {
@ -20,7 +23,7 @@ public class UUIDPositiveLongGeneratorUnitTest {
assertThat(randomPositiveLong).isPositive(); assertThat(randomPositiveLong).isPositive();
} }
private byte[] toByteArray(UUID uuid) { private byte[] toByteArrayBitwise(UUID uuid) {
long msb = uuid.getMostSignificantBits(); long msb = uuid.getMostSignificantBits();
long lsb = uuid.getLeastSignificantBits(); long lsb = uuid.getLeastSignificantBits();
byte[] buffer = new byte[16]; byte[] buffer = new byte[16];
@ -33,11 +36,49 @@ public class UUIDPositiveLongGeneratorUnitTest {
return buffer; return buffer;
} }
// private byte[] toByteArray(UUID uuid) {
// long msb = uuid.getMostSignificantBits();
// long lsb = uuid.getLeastSignificantBits();
//
// String binaryString = Long.toBinaryString(msb) + Long.toBinaryString(lsb);
//
// // Memastikan panjang string biner menggunakan StringBuilder
// StringBuilder sb = new StringBuilder();
// for (int i = 0; i < 128 - binaryString.length(); i++) {
// sb.append('0');
// }
// sb.append(binaryString);
// String paddedString = sb.toString();
//
// // Mengubah string biner menjadi array byte
// byte[] bytes = new byte[paddedString.length() / 8];
// for (int i = 0; i < bytes.length; i++) {
// String byteString = paddedString.substring(i * 8, (i + 1) * 8);
// bytes[i] = (byte) Integer.parseInt(byteString, 2);
// }
//
// return bytes;
// }
private byte[] toByteArray(UUID uuid) {
long msb = uuid.getMostSignificantBits();
long lsb = uuid.getLeastSignificantBits();
// Menggabungkan most significant bits dan least significant bits menjadi satu nilai long
byte[] uuidBytes = new byte[16];
ByteBuffer.wrap(uuidBytes)
.putLong(msb)
.putLong(lsb);
return uuidBytes;
}
@Test @Test
public void whenGivenUUID_thenVerified() { public void whenGivenUUID_thenVerified() {
for (int i = 0; i < 100; i++) { for (int i = 0; i < 100; i++) {
UUID uuid = UUID.randomUUID(); UUID uuid = UUID.randomUUID();
byte[] bytes = toByteArray(uuid); byte[] bytes = toByteArray(uuid);
// byte[] bytes = UUIDUtil.asByteArray(uuid);
// assert that byte at index 6 is 0x40 (version 4) // assert that byte at index 6 is 0x40 (version 4)
byte byte6 = bytes[6]; byte byte6 = bytes[6];