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simplyfiying test

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@hangga 2023-11-18 14:17:19 +07:00
parent 0c8b5bd210
commit 213fb362a0
1 changed files with 10 additions and 67 deletions
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77
core-java-modules/core-java-uuid/src/test/java/com/baeldung/uuid/UUIDPositiveLongGeneratorUnitTest.java
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@ -1,89 +1,32 @@
package com.baeldung.uuid;
import org.junit.jupiter.api.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.lang.reflect.Method;
import java.text.DecimalFormat;
import java.util.*;
import java.util.HashSet;
import java.util.Set;
import static org.assertj.core.api.Assertions.assertThat;
public class UUIDPositiveLongGeneratorUnitTest {
private final static int NUMBER_OF_CHECKS = 1000000;
private final static double COLLISION_THRESHOLD = 0.001;
private final UUIDPositiveLongGenerator uuidLongGenerator = new UUIDPositiveLongGenerator();
private final Logger logger = LoggerFactory.getLogger(UUIDPositiveLongGeneratorUnitTest.class);
List<Long> times = new ArrayList<>();
//private final UUIDPositiveLongGenerator uuidLongGenerator = new UUIDPositiveLongGenerator();
Set<Long> uniqueValues = new HashSet<>();
@Test
void whenForeachGenerateLongValue_thenCollisionsCheck() throws Exception {
times.clear();
printTableHeader();
UUIDPositiveLongGenerator uuidLongGenerator = new UUIDPositiveLongGenerator();
for (Method method : uuidLongGenerator.getClass().getDeclaredMethods()) {
collisionCheck(method);
}
}
private void printTableHeader() {
logger.info(String.format("%-25s %15s %15s %15s", "Approach(method name)", "collisions", "probability","Testing Time"));
logger.info("--------------------------------------------------------------------------------");
}
private void printOutput(String method, int collisionsCount, double collisionsProbability, String time) {
DecimalFormat decimalFormat = new DecimalFormat("#.#####");
logger.info(String.format("%-25s %15s %15s %15s", method, collisionsCount, decimalFormat.format(collisionsProbability),time));
}
private void collisionCheck(Method method) throws Exception {
long start = System.currentTimeMillis();
Set<Long> uniqueValues = new HashSet<>();
int collisions = 0;
for (int i = 0; i < NUMBER_OF_CHECKS; i++) {
long uniqueValue = (long) method.invoke(uuidLongGenerator);
long uniqueValue;
do uniqueValue = (long) method.invoke(uuidLongGenerator); while (!isUnique(uniqueValue));
assertThat(uniqueValue).isPositive();
if (!uniqueValues.add(uniqueValue)) {
collisions++;
}
}
double collisionsProbability = (double) collisions / NUMBER_OF_CHECKS;
long end = System.currentTimeMillis();
String time = convertMillisToTime(end - start);
printOutput(method.getName(), collisions, collisionsProbability, time);
assertThat(collisionsProbability).isLessThan(COLLISION_THRESHOLD);
}
private boolean isUnique(long value) {
// Implementasikan logika pengecekan keunikan, misalnya, dengan memeriksa dalam database
// Mengembalikan true jika nilai unik, false jika ada tumbukan
return true; // Implementasikan sesuai kebutuhan aplikasi Anda
// Implement uniqueness checking logic, for example, by checking in the database
return uniqueValues.add(value);
}
private String convertMillisToTime(long currentTimeMillis) {
long totalMilliseconds = currentTimeMillis % 1000;
times.add(totalMilliseconds);
long totalSeconds = (currentTimeMillis / 1000) % 60;
long totalMinutes = (currentTimeMillis / 60000) % 60;
long hours = (currentTimeMillis / 3600000);
StringJoiner stringBuffer = new StringJoiner("");
if (hours > 0){
stringBuffer.add(hours+"h ");
}
if (totalMinutes > 0){
stringBuffer.add(totalMinutes+" m ");
}
if (totalSeconds > 0){
stringBuffer.add(totalSeconds+" s ");
}
if (totalMilliseconds > 0){
stringBuffer.add(totalMilliseconds+" ms");
}
return stringBuffer.toString();
}
}