Helper.kt

class Helper {
  fun isPallindrome(input: String): Boolean{
    var i = 0
    var j = input.length - 1
    var result = true
    
    while (i < j){
      if(input[i] != input[j]){
        result = false
        break
      }
      i++
      j--
    }
    
    return result
  }
}

HelperTest.kt

class helperTest{
  
  lateinit var helper: Helper
  
  @Before
  fun setUp(){
    helper = Helper()
    println("Before Every Test Case")
  }
  
  @After
  fun tearDown(){
    println("After Every Test Case")
  }

  @Test
  fun `ispallindrome input String hello expected boolean false`(){
      //Arrange
//       val helper = Helper()
      //Act
      val result = helper.isPallindrome("hello")
      //Assert
      assertEquals(expected:false,result)
  }
  
  @Test
  fun `ispallindrome input String level expected boolean true`(){
       //Arrange
//       val helper = Helper()
      //Act
      val result = helper.isPallindrome("level")
      //Assert
      assertEquals(expected:true,result)
  }
}