package cvdatpjunit;

import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.Assertions;

/**
 * This class are tests for the CVDATPJUnit class
 * @author Florian Charlaix
 */
class CVDATPJUnitTest {

    /**
     * This function test the swapTwoLast static function
     */
    @Test
    void swapTwoLastTest() {
        Assertions.assertEquals("BA", CVDATPJUnit.swapTwoLast("AB"));
        Assertions.assertEquals("RANI", CVDATPJUnit.swapTwoLast("RAIN"));
        Assertions.assertEquals("TENRANI", CVDATPJUnit.swapTwoLast("TENRAIN"));
        Assertions.assertEquals("A", CVDATPJUnit.swapTwoLast("A"));
        Assertions.assertEquals("", CVDATPJUnit.swapTwoLast(""));
        Assertions.assertNull(CVDATPJUnit.swapTwoLast(null));
    }

    /**
     * This function test the removeAFromTwoFirstChars static function
     */
    @Test
    void removeAFromTwoFirstCharsTest() {
        Assertions.assertEquals("BCD", CVDATPJUnit.removeAFromTwoFirstChars("ABCD"));
        Assertions.assertEquals("BBAA", CVDATPJUnit.removeAFromTwoFirstChars("BBAA"));
        Assertions.assertEquals("CD", CVDATPJUnit.removeAFromTwoFirstChars("AACD"));
        Assertions.assertEquals("BCD", CVDATPJUnit.removeAFromTwoFirstChars("BACD"));
        Assertions.assertEquals("BAA", CVDATPJUnit.removeAFromTwoFirstChars("AABAA"));
        Assertions.assertEquals("B", CVDATPJUnit.removeAFromTwoFirstChars("AB"));
        Assertions.assertEquals("B", CVDATPJUnit.removeAFromTwoFirstChars("B"));
        Assertions.assertEquals("", CVDATPJUnit.removeAFromTwoFirstChars("A"));
        Assertions.assertEquals("", CVDATPJUnit.removeAFromTwoFirstChars(""));
        Assertions.assertNull(CVDATPJUnit.removeAFromTwoFirstChars(null));
    }
}