isPalindrome() Test JUnit5

import org.junit.jupiter.api.*;

class PalindromeTest {

    @Test
    void testWithEmptyString() {
        String testStr = "";
        assertThat(isPalindrome(testStr)).isTrue();
    }

    @Test
    void testWithOneChar() {
        String testStr = "a";
        assertThat(isPalindrome(testStr)).isTrue();
    }

    @Test
    void testWithCharsTrue() {
        String testStr = "aba";
        assertThat(isPalindrome(testStr)).isTrue();
    }

    @Test
    void testWithCharsFalse() {
        String testStr = "abc";
        assertThat(isPalindrome(testStr)).isFalse();
    }
}