org.opentest$4$j$.$AssertionFailedError: Something went wrong! best i can tell is null

at org.junit.jupiter.api.AssertionUtils.fail$($AssertionUtils$.$java:$39)$

at org.junit.jupiter.api.Assertions.fail$($Assertions$.$java:$109)$

at MachineTests.testMachineCreationArray$($MachineTests$.$java:$326)$ org.opentest$4$j$.$AssertionFailedError: Something went wrong! best i can tell is null

at org.junit.jupiter.api.AssertionUtils.fail$($AssertionUtils$.$java:$39)$

at org.junit.jupiter.api.Assertions.fail$($Assertions$.$java:$109)$

at MachineTests.testMachineTurnValid$($MachineTests$.$java:$469)$ How to fix these issues here is my code import java.util.List;

import java.util.ArrayList;

public class Machine $\{$

private int$[]$ ans;

private List verifierss;

public Machine$($int$[]$ ans, Verifier$[]$ verifierss$)$ throws IncorrectDataException $\{$

correctAns$($ans$)$;

this.ans $=$ ans;

this.verifierss $=$ List.of$($verifierss$)$;

$\}$

public Machine$($int$[]$ ans, List verifierss$)$ throws IncorrectDataException $\{$

correctAns$($ans$)$;

this.ans $=$ ans;

this.verifierss $=$ new ArrayList$<>($verifierss$)$;

$\}$

private void correctAns$($int$[]$ ans$)$ throws IncorrectDataException $\{$

if $($ans$.$length $!=3)\{$

throw new IncorrectDataException$("$Answer must consist of exactly $3$ digits."$)$;

$\}$

for $($int n : ans$)\{$

if $($n $<1||$ n $>5)\{$

throw new IncorrectDataException$("$Digits must be within the range $1-5.")$;

$\}$

$\}$

$\}$

public String toString$()\{$

StringBuilder stringbuilder $=$ new StringBuilder$("$Verifiers:

$")$;

char verifierCh $=\text{'}$A$\text{'}$;

for $($Verifier verifier : verifierss$)\{$

stringbuilder.append$($verifierCh$).$append$(")").$append$($verifier$.$toString$()).$append$("$

$")$;

verifierCh$++$;

$\}$

return stringbuilder.toString$().$trim$()$;

$\}$

public String turn$($int$[]$ guess, char$[]$ verifierChoice$)$ throws IncorrectDataException $\{$

correctGuess$($guess$)$;

if $($verifierChoice$.$length $!=3)\{$

throw new IncorrectDataException$("$There must be exactly $3$ selected verifiers."$)$;

$\}$

StringBuilder stringbuilder $=$ new StringBuilder$("$Results for guess $")$;

for $($int n : guess$)\{$

stringbuilder.append$($n$)$;

$\}$

stringbuilder.append$("$:

$")$;

List sortedChoice $=$ new ArrayList$<>()$;

for $($char c : verifierChoice$)\{$

sortedChoice.add$($Character$.$toUpperCase$($c$))$;

$\}$

sortedChoice.sort$($Character::compareTo$)$;

for $($char choicee : sortedChoice$)\{$

int i $=$ choicee $-\text{'}$A$\text{'}$;

if $($i $<0||$ i $>=$ verifierss.size$())\{$

throw new IncorrectDataException$("$Selected verifier is out of bounds."$)$;

$\}$

Verifier verifier $=$ verifierss.get$($i$)$;

stringbuilder.append$($choicee$).$append$(")").$append$($verifier$.$check$($guess$,$ ans$)).$append$("$

$")$;

$\}$

return stringbuilder.toString$().$trim$()$;

$\}$

public String turn$($int$[]$ guess, String verifierChoice$)$ throws IncorrectDataException $\{$

char$[]$ choiceArray $=$ verifierChoice.replace$("","").$toCharArray$()$;

return turn$($guess$,$ choiceArray$)$;

$\}$

public boolean finalGuess$($int$[]$ guess$)$ throws IncorrectDataException $\{$

correctGuess$($guess$)$;

for $($int i $=0$; i $<$ guess.length; i$++)\{$

if $($guess$[$i$]!=$ ans$[$i$])\{$

return false;

$\}$

$\}$

return true;

$\}$

private void correctGuess$($int$[]$ guess$)$ throws IncorrectDataException $\{$

if $($guess$.$length $!=3)\{$

throw new IncorrectDataException$("$Guess must consist of exactly $3$ digits."$)$;

$\}$

for $($int n : guess$)\{$

if $($n $<1||$ n $>5)\{$

throw new IncorrectDataException$("$Digits must be within the range $1-5.")$;

$\}$

$\}$

$\}$

$\}$