Add tests, remove main in WordBoggle (#5782)

DIRECTORY.md

@@ -1021,6 +1021,7 @@
             * [PalindromeSinglyLinkedListTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/misc/PalindromeSinglyLinkedListTest.java)
             * [RangeInSortedArrayTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/misc/RangeInSortedArrayTest.java)
             * [TwoSumProblemTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/misc/TwoSumProblemTest.java)
+            * [WordBoggleTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/misc/WordBoggleTest.java)
           * others
             * [ArrayLeftRotationTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/others/ArrayLeftRotationTest.java)
             * [ArrayRightRotationTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/others/ArrayRightRotationTest.java)

src/main/java/com/thealgorithms/misc/WordBoggle.java

@@ -1,7 +1,6 @@
 package com.thealgorithms.misc;
 
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
@@ -32,36 +31,6 @@ public final class WordBoggle {
         return new ArrayList<>(finalWords);
     }
 
-    public static void main(String[] args) {
-        // Testcase
-        List<String> ans = new ArrayList<>(Arrays.asList("a", "boggle", "this", "NOTRE_PEATED", "is", "simple", "board"));
-        assert (boggleBoard(
-            new char[][] {
-                {'t', 'h', 'i', 's', 'i', 's', 'a'},
-                {'s', 'i', 'm', 'p', 'l', 'e', 'x'},
-                {'b', 'x', 'x', 'x', 'x', 'e', 'b'},
-                {'x', 'o', 'g', 'g', 'l', 'x', 'o'},
-                {'x', 'x', 'x', 'D', 'T', 'r', 'a'},
-                {'R', 'E', 'P', 'E', 'A', 'd', 'x'},
-                {'x', 'x', 'x', 'x', 'x', 'x', 'x'},
-                {'N', 'O', 'T', 'R', 'E', '_', 'P'},
-                {'x', 'x', 'D', 'E', 'T', 'A', 'E'},
-            },
-            new String[] {
-                "this",
-                "is",
-                "not",
-                "a",
-                "simple",
-                "test",
-                "boggle",
-                "board",
-                "REPEATED",
-                "NOTRE_PEATED",
-            })
-                    .equals(ans));
-    }
-
     public static void explore(int i, int j, char[][] board, TrieNode trieNode, boolean[][] visited, Set<String> finalWords) {
         if (visited[i][j]) {
             return;

src/test/java/com/thealgorithms/misc/WordBoggleTest.java

@@ -0,0 +1,56 @@
+package com.thealgorithms.misc;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.stream.Stream;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
+
+class WordBoggleTest {
+    private char[][] board;
+
+    @BeforeEach
+    void setup() {
+        board = new char[][] {
+            {'t', 'h', 'i', 's', 'i', 's', 'a'},
+            {'s', 'i', 'm', 'p', 'l', 'e', 'x'},
+            {'b', 'x', 'x', 'x', 'x', 'e', 'b'},
+            {'x', 'o', 'g', 'g', 'l', 'x', 'o'},
+            {'x', 'x', 'x', 'D', 'T', 'r', 'a'},
+            {'R', 'E', 'P', 'E', 'A', 'd', 'x'},
+            {'x', 'x', 'x', 'x', 'x', 'x', 'x'},
+            {'N', 'O', 'T', 'R', 'E', '_', 'P'},
+            {'x', 'x', 'D', 'E', 'T', 'A', 'E'},
+        };
+    }
+
+    @ParameterizedTest
+    @MethodSource("provideTestCases")
+    void testBoggleBoard(String[] words, List<String> expectedWords, String testDescription) {
+        List<String> result = WordBoggle.boggleBoard(board, words);
+        assertEquals(expectedWords.size(), result.size(), "Test failed for: " + testDescription);
+        assertTrue(expectedWords.containsAll(result), "Test failed for: " + testDescription);
+    }
+
+    private static Stream<Arguments> provideTestCases() {
+        return Stream.of(Arguments.of(new String[] {"this", "is", "not", "a", "simple", "test", "boggle", "board", "REPEATED", "NOTRE_PEATED"}, Arrays.asList("this", "is", "a", "simple", "board", "boggle", "NOTRE_PEATED"), "All words"),
+            Arguments.of(new String[] {"xyz", "hello", "world"}, List.of(), "No matching words"), Arguments.of(new String[] {}, List.of(), "Empty words array"), Arguments.of(new String[] {"this", "this", "board", "board"}, Arrays.asList("this", "board"), "Duplicate words in input"));
+    }
+
+    @ParameterizedTest
+    @MethodSource("provideSpecialCases")
+    void testBoggleBoardSpecialCases(char[][] specialBoard, String[] words, List<String> expectedWords, String testDescription) {
+        List<String> result = WordBoggle.boggleBoard(specialBoard, words);
+        assertEquals(expectedWords.size(), result.size(), "Test failed for: " + testDescription);
+        assertTrue(expectedWords.containsAll(result), "Test failed for: " + testDescription);
+    }
+
+    private static Stream<Arguments> provideSpecialCases() {
+        return Stream.of(Arguments.of(new char[0][0], new String[] {"this", "is", "a", "test"}, List.of(), "Empty board"));
+    }
+}