socialclient-java/src/test/java/net/nosial/socialclient/classes/UtilitiesTest.java

package net.nosial.socialclient.classes;

import net.nosial.socialclient.classes.Utilities;
import org.junit.jupiter.api.Test;

import java.util.regex.Pattern;
import java.util.HashSet;
import java.util.Set;

import static org.junit.jupiter.api.Assertions.*;

public class UtilitiesTest {

    @Test
    public void testRandomCrc32_formatValidity() {
        String crcOutput = Utilities.randomCrc32();
        assertNotNull(crcOutput);
        assertTrue(crcOutput.matches("[a-f0-9]+"), "Expected hexadecimal output");
    }

    @Test
    public void testRandomCrc32_lengthValidity() {
        String crcOutput = Utilities.randomCrc32();
        assertEquals(8, crcOutput.length(), "Expected 8 characters length");
    }

    @Test
    public void testRandomCrc32_randomness() {
        Set<String> randomResults = new HashSet<>();

        for (int i = 0; i < 10_000; i++) {
            randomResults.add(Utilities.randomCrc32());
        }

        assertTrue(randomResults.size() > 1, "Expected more than one different results");
    }
}