package com.thealgorithms.strings; import org.junit.jupiter.api.Test; import static org.junit.jupiter.api.Assertions.*; public class CharacterSameTest { @Test public void isAllCharactersSame() { String input1 = "aaa"; String input2 = "abc"; String input3 = "1 1 1 1"; String input4 = "111"; String input5 = ""; String input6 = " "; String input7 = ". "; assertTrue(CharactersSame.isAllCharactersSame(input1)); assertFalse(CharactersSame.isAllCharactersSame(input2)); assertFalse(CharactersSame.isAllCharactersSame(input3)); assertTrue(CharactersSame.isAllCharactersSame(input4)); assertTrue(CharactersSame.isAllCharactersSame(input5)); assertTrue(CharactersSame.isAllCharactersSame(input6)); assertFalse(CharactersSame.isAllCharactersSame(input7)); } }