HexaDecimalToDecimalTest.java

package com.thealgorithms.conversions;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertThrows;

import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.CsvSource;

public class HexaDecimalToDecimalTest {

 @ParameterizedTest
 @CsvSource({
 "A1, 161", // Simple case with two characters
 "1AC, 428", // Mixed-case input
 "0, 0", // Single zero
 "F, 15", // Single digit
 "10, 16", // Power of 16
 "FFFF, 65535", // Max 4-character hex
 "7FFFFFFF, 2147483647" // Max positive int value
 })
 public void
 testValidHexaToDecimal(String hexInput, int expectedDecimal) {
 assertEquals(expectedDecimal, HexaDecimalToDecimal.getHexaToDec(hexInput));
 }

 @ParameterizedTest
 @CsvSource({
 "G", // Invalid character
 "1Z", // Mixed invalid input
 "123G", // Valid prefix with invalid character
 "#$%" // Non-hexadecimal symbols
 })
 public void
 testInvalidHexaToDecimal(String invalidHex) {
 assertThrows(IllegalArgumentException.class, () -> HexaDecimalToDecimal.getHexaToDec(invalidHex));
 }
}