crete vite test code for this code: export interface Syllable $\{$

text: string;

row: number;

column: number;

$\}$

export class PuzzleModel $\{$

private originalWords: string$[][]$;

public currentGrid: Syllable$[][]$;

public swaps: number;

public score: number;

private history: Syllable$[][][]$;

constructor$($words: string$[][])\{$

this.originalWords $=$ words;

this.currentGrid $=$ this.initializeGrid$($words$)$;

this.swaps $=0$;

this.score $=0$;

this.history $=[$this$.$currentGrid$]$;

$\}$

private initializeGrid$($words: string$[][])$: Syllable$[][]\{$

const syllables $=$ words.flat$().$map$(($syllable$,$ index$)=>(\{$

text: syllable,

row: Math.floor$($index $/4),$

column: index $\%4,$

$\}))$;

return this.shuffleGrid$($syllables$)$;

$\}$

private shuffleGrid$($syllables: Syllable$[])$: Syllable$[][]\{$

$//$ Shuffle syllables and form the grid

const shuffled $=$ syllables.sort$(()=>$ Math.random$()-0\mathrm{.}5)$;

return $[$shuffled$.$slice$(0,4),$ shuffled.slice$(4,8),$ shuffled.slice$(8,12),$ shuffled.slice$(12)]$;

$\}$

public swapSyllables$($row$1$: number, col$1$: number, row$2$: number, col$2$: number$)\{$

const temp $=$ this.currentGrid$[$row$1][$col$1]$;

this.currentGrid$[$row$1][$col$1]=$ this.currentGrid$[$row$2][$col$2]$;

this.currentGrid$[$row$2][$col$2]=$ temp;

this.swaps$++$;

this.updateScore$()$;

this.history.push$($this$.$currentGrid$)$;

$\}$

private updateScore$()\{$

$//$ Calculate score based on positions of syllables

this.score $=$ this.currentGrid.flat$().$reduce$(($score$,$ syllable, index$)=>\{$

const originalRow $=$ Math.floor$($index $/4)$;

return score $+($syllable$.$row $===$ originalRow $?1$ : $0)$;

$\},0)$;

$\}$

public resetPuzzle$()\{$

this.currentGrid $=$ this.initializeGrid$($this$.$originalWords$)$;

this.swaps $=0$;

this.score $=0$;

this.history $=[$this$.$currentGrid$]$;

$\}$

public undoLastSwap$()\{$

if $($this$.$history.length $>1)\{$

this.history.pop$()$;

this.currentGrid $=$ this.history$[$this$.$history.length $-1]$;

$\}$

$\}$

$\}$