[34/N] Add unit tests for Graph, BFS, DFS, Dijkstras, Prims, Kruskals, Floyd, CreateGraph, and LVA algorithms

[karkir0003]

PR Stack

1. ⬅️ [1/N] Update CI to run frontend unit tests #91 (Add test infrastructure and Jest setup)
2. ⬅️ [2/N] Configure React Testing Library and Setup Tests #92 (Add unit tests for Header, Footer, and Blob components)
3. ⬅️ [3/N] Add unit tests for SideButton component #94 (Add unit tests for HomeScreen components (SideButton, SearchFilter))
4. ⬅️ [4/N] Add unit tests for SearchFilter component #95 (Add unit tests for AlgoScreen components (AlgoSection, Pseudocode, ModalSidebarSectionTab))
5. ⬅️ [6/N] Add unit tests for Blob mascot component #97 (Add unit tests for modals (BigOModal, InfoModals))
6. ⬅️ [5/N] Add unit tests for Header and Footer components #96 (Add unit tests for AlgorithmNotFound404 component)
7. ⬅️ [7/N] Add unit tests for AboutScreen screen #98 (Add unit tests for HomeScreen page)
8. ⬅️ [8/N] Add integration tests for HomeScreen screen #99 (Add unit tests for AboutScreen page)
9. ⬅️ [9/N] Add unit tests for AlgorithmNotFound404 component #100 (Add unit tests for AlgoScreen page)
10. ⬅️ [10/N] Add integration tests for AlgoScreen screen #101 (Add unit tests for App root component and routes)
11. ⬅️ [11/N] Add unit tests for ModalSidebarSectionTab component #102 (Add test coverage workflow for CI)
12. ⬅️ [12/N] Add unit tests for BigOModal component #103 (Add unit tests for CustomEvents animation utility)
13. ⬅️ [13/N] Add unit tests for Pseudocode component #104 (Add unit tests for UndoFunctions animation utility)
14. ⬅️ [14/N] Add unit and integration tests for AlgoSection component #105 (Add unit tests for AnimatedCircle animation primitive)
15. ⬅️ [15/N] Add unit and integration tests for root App component #106 (Add unit tests for AnimatedHighlightCircle)
16. ⬅️ [16/N] Add unit tests for animation events and undo functions #107 (Add unit tests for SingleAnimation)
17. ⬅️ [17/N] Add unit tests for AnimatedObject, AnimatedCircle, and AnimatedHighlightCircle #108 (Add unit tests for AnimatedObject base class)
18. ⬅️ [18/N] Add unit tests for AnimatedRectangle, AnimatedLabel, and AnimatedLine #109 (Add unit tests for AnimatedRectangle, AnimatedLabel, and AnimatedLine)
19. ⬅️ [19/N] Add unit tests for AnimatedLinkedListNode, AnimatedDoublyLinkedListNode, and AnimatedCircularlyLinkedListNode #110 (Add unit tests for AnimatedLinkedListNode, AnimatedDoublyLinkedListNode, and AnimatedCircularlyLinkedListNode)
20. ⬅️ [20/N] Add unit tests for AnimatedBTreeNode and AnimatedSkipListNode #111 (Add unit tests for AnimatedBTreeNode and AnimatedSkipListNode)
21. ⬅️ [21/N] Add unit tests for ObjectManager #112 (Add unit tests for ObjectManager)
22. ⬅️ [22/N] Add unit tests for AnimationMain #113 (Add unit tests for AnimationMain)
23. ⬅️ [23/N] Add unit tests for algo util helpers (PriorityQueue, SkipListHeads, GraphValues) #114 (Add unit tests for algo util helpers (PriorityQueue, SkipListHeads, GraphValues))
24. ⬅️ [24/N] Add unit tests for base Algorithm class and control bar helpers #115 (Add unit tests for base Algorithm class and control bar helpers)
25. ⬅️ [25/N] Add unit tests for ArrayList algorithm #116 (Add unit tests for ArrayList algorithm)
26. ⬅️ [26/N] Add unit tests for LinkedList, DoublyLinkedList, and CircularlyLinkedList algorithms #117 (Add unit tests for LinkedList, DoublyLinkedList, and CircularlyLinkedList algorithms)
27. ⬅️ [27/N] Add unit tests for Stack, Queue, and Deque algorithms (Array and LL variants) #118 (Add unit tests for Stack, Queue, and Deque algorithms (Array and LL variants))
28. ⬅️ [28/N] Add unit tests for BST, AVL, Heap, and SplayTree algorithms #119 (Add unit tests for BST, AVL, Heap, and SplayTree algorithms)
29. ⬅️ [29/N] Add unit tests for BTree, TreeMap, SkipList, and DisjointSet algorithms #120 (Add unit tests for BTree, TreeMap, SkipList, and DisjointSet algorithms)
30. ⬅️ [30/N] Add unit tests for Hash, OpenHash, ClosedHash, and NonLinearProbing algorithms #121 (Add unit tests for Hash, OpenHash, ClosedHash, and NonLinearProbing algorithms)
31. ⬅️ [31/N] Add unit tests for BruteForce, BoyerMoore, KMP, RabinKarp, and LCS pattern matching algorithms #122 (Add unit tests for BruteForce, BoyerMoore, KMP, RabinKarp, and LCS pattern matching algorithms)
32. ⬅️ [32/N] Add unit tests for BubbleSort, CocktailSort, SelectionSort, InsertionSort, MergeSort, Quicksort, Quickselect, and HeapSort algorithms #123 (Add unit tests for BubbleSort, CocktailSort, SelectionSort, InsertionSort, MergeSort, Quicksort, Quickselect, and HeapSort algorithms)
33. ⬅️ [33/N] Add unit tests for LSDRadix, RadixSort, BogoSort, DropSort, FredSort, MiracleSort, and SleepSort algorithms #124 (Add unit tests for LSDRadix, RadixSort, BogoSort, DropSort, FredSort, MiracleSort, and SleepSort algorithms)
34. 👉 #CURRENT — Add unit tests for Graph, BFS, DFS, Dijkstras, Prims, Kruskals, Floyd, CreateGraph, and LVA algorithms (this PR)
35. ➡️ [35/N] Add unit tests for AlgoList registry, algorithm index, and InfoModals #126 (Add unit tests for AlgoList registry, algorithm index, and InfoModals)

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Addresses #93

Context

Adds comprehensive unit test coverage for graph algorithm visualizers and graph management components:

• Graph.js: Core base class for all graph algorithm visualizers managing logical representation, adjacency list, and adjacency matrix view layers, directed/undirected modes, and small (8 nodes) vs large (18 nodes) graph layouts.
• BFS.js: Breadth-First Search traversal with start vertex validation, FIFO queue animation, and visited set updates.
• DFS.js: Depth-First Search supporting both recursive call stack visualization and iterative explicit stack traversal modes.
• Dijkstras.js: Dijkstra's single-source shortest path algorithm utilizing PriorityQueue, dynamic distance map table entries, and shortest path tree construction.
• Prims.js: Prim's Minimum Spanning Tree algorithm tracking visited cut partitions, priority queue edges, and highlighted MST edge formatting.
• Kruskals.js: Kruskal's Minimum Spanning Tree algorithm using Disjoint Sets data structures (setData), edge weight sorting, and cycle detection.
• Floyd.js: Floyd-Warshall all-pairs shortest paths algorithm computing 2D cost and path tables via dynamic programming relaxation passes.
• CreateGraph.js: Interactive graph designer with textarea adjacency list parser, live character sanitization, and matrix reconstruction.
• LVA.js: Lowest Value Adjacent tree visualizer with insert, delete, find, print traversals, and Left-LVA / Right-LVA rotational balancing.

Changes Made

• Introduced src/algo/__tests__/Graph.test.js:
  • Controls registration, size switching (small/large), directed/undirected toggling.
  • New/default graph callbacks, layer visibility switching (logical, adj list, adj matrix).
  • UI control enable/disable.
• Introduced src/algo/__tests__/BFS.test.js:
  • Input controls, start vertex validation (empty and out-of-range).
  • BFS traversal execution, visited coloring, reset, and Enter key handler.
• Introduced src/algo/__tests__/DFS.test.js:
  • Recursion vs physical stack mode toggling (stackCallback).
  • Validation in doDFSRecursive and doDFSStack.
  • Traversal execution under both recursion and iterative stack modes.
• Introduced src/algo/__tests__/Dijkstras.test.js:
  • Distance map table, PQ queue labels, start vertex validation, and shortest path updates.
• Introduced src/algo/__tests__/Prims.test.js:
  • MST edge styling, priority queue integration, start vertex validation, and traversal.
• Introduced src/algo/__tests__/Kruskals.test.js:
  • Disjoint set table, edge list sorting, union-find cycle detection, and MST highlights.
• Introduced src/algo/__tests__/Floyd.test.js:
  • Cost table and path table grids, all-pairs relaxation animation, and INF label formatting.
• Introduced src/algo/__tests__/CreateGraph.test.js:
  • Textarea input validation, regex sanitization, adjacency list parsing, and graph rebuilding.
• Introduced src/algo/__tests__/LVA.test.js:
  • Insert, delete, find, print, clear operations.
  • Right-LVA vs Left-LVA mode toggles and tree balancing.

Test Plan

• Ran npm test -- --watchAll=false (all 9 new test suites pass, 55 unit tests passing; 84 suites, 886 tests passing repository-wide).
• Ran npm run lint and npm run prettier (0 errors, 0 warnings).