Add tests, remove print & main methods in BoundaryFill.java

DIRECTORY.md

@@ -31,6 +31,7 @@
             * [IsPowerTwo](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/bitmanipulation/IsPowerTwo.java)
             * [LowestSetBit](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/bitmanipulation/LowestSetBit.java)
             * [NonRepeatingNumberFinder](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/bitmanipulation/NonRepeatingNumberFinder.java)
+            * [NumberAppearingOddTimes](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/bitmanipulation/NumberAppearingOddTimes.java)
             * [NumbersDifferentSigns](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/bitmanipulation/NumbersDifferentSigns.java)
             * [ReverseBits](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/bitmanipulation/ReverseBits.java)
             * [SingleBitOperations](https://github.com/TheAlgorithms/Java/blob/master/src/main/java/com/thealgorithms/bitmanipulation/SingleBitOperations.java)
@@ -638,6 +639,7 @@
             * [IsPowerTwoTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/bitmanipulation/IsPowerTwoTest.java)
             * [LowestSetBitTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/bitmanipulation/LowestSetBitTest.java)
             * [NonRepeatingNumberFinderTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/bitmanipulation/NonRepeatingNumberFinderTest.java)
+            * [NumberAppearingOddTimesTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/bitmanipulation/NumberAppearingOddTimesTest.java)
             * [NumbersDifferentSignsTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/bitmanipulation/NumbersDifferentSignsTest.java)
             * [ReverseBitsTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/bitmanipulation/ReverseBitsTest.java)
             * [SingleBitOperationsTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/bitmanipulation/SingleBitOperationsTest.java)
@@ -777,6 +779,7 @@
             * [StrassenMatrixMultiplicationTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/divideandconquer/StrassenMatrixMultiplicationTest.java)
           * dynamicprogramming
             * [BoardPathTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/dynamicprogramming/BoardPathTest.java)
+            * [BoundaryFillTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/dynamicprogramming/BoundaryFillTest.java)
             * [CatalanNumberTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/dynamicprogramming/CatalanNumberTest.java)
             * [ClimbStairsTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/dynamicprogramming/ClimbStairsTest.java)
             * [EditDistanceTest](https://github.com/TheAlgorithms/Java/blob/master/src/test/java/com/thealgorithms/dynamicprogramming/EditDistanceTest.java)

src/main/java/com/thealgorithms/dynamicprogramming/BoundaryFill.java

@@ -52,48 +52,4 @@ public static void boundaryFill(int[][] image, int xCoordinate, int yCoordinate,
             boundaryFill(image, xCoordinate - 1, yCoordinate - 1, newColor, boundaryColor);
         }
     }
-
-    /**
-     * This method will print the 2D image matrix
-     *
-     * @param image The image to be printed on the console
-     */
-    public static void printImageArray(int[][] image) {
-        for (int i = 0; i < image.length; i++) {
-            for (int j = 0; j < image[0].length; j++) {
-                System.out.print(image[i][j] + "  ");
-            }
-
-            System.out.println();
-        }
-    }
-
-    // Driver Program
-    public static void main(String[] args) {
-        // Input 2D image matrix
-        int[][] image = {
-            {0, 0, 0, 0, 0, 0, 0},
-            {0, 3, 3, 3, 3, 0, 0},
-            {0, 3, 0, 0, 3, 0, 0},
-            {0, 3, 0, 0, 3, 3, 3},
-            {0, 3, 3, 3, 0, 0, 3},
-            {0, 0, 0, 3, 0, 0, 3},
-            {0, 0, 0, 3, 3, 3, 3},
-        };
-
-        boundaryFill(image, 2, 2, 5, 3);
-
-        /* Output ==>
-                 * 0  0  0  0  0  0  0
-                   0  3  3  3  3  0  0
-                   0  3  5  5  3  0  0
-           0  3  5  5  3  3  3
-           0  3  3  3  5  5  3
-           0  0  0  3  5  5  3
-           0  0  0  3  3  3  3
-                 * */
-
-        // print 2D image matrix
-        printImageArray(image);
-    }
 }

src/test/java/com/thealgorithms/dynamicprogramming/BoundaryFillTest.java

@@ -0,0 +1,66 @@
+package com.thealgorithms.dynamicprogramming;
+
+import static org.junit.jupiter.api.Assertions.assertArrayEquals;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+public class BoundaryFillTest {
+
+    private int[][] image;
+
+    @BeforeEach
+    void setUp() {
+        image = new int[][] {{0, 0, 0, 0, 0, 0, 0}, {0, 3, 3, 3, 3, 0, 0}, {0, 3, 0, 0, 3, 0, 0}, {0, 3, 0, 0, 3, 3, 3}, {0, 3, 3, 3, 0, 0, 3}, {0, 0, 0, 3, 0, 0, 3}, {0, 0, 0, 3, 3, 3, 3}};
+    }
+
+    @Test
+    void testGetPixel() {
+        assertEquals(3, BoundaryFill.getPixel(image, 1, 1));
+        assertEquals(0, BoundaryFill.getPixel(image, 2, 2));
+        assertEquals(3, BoundaryFill.getPixel(image, 4, 3));
+    }
+
+    @Test
+    void testPutPixel() {
+        BoundaryFill.putPixel(image, 2, 2, 5);
+        assertEquals(5, BoundaryFill.getPixel(image, 2, 2));
+
+        BoundaryFill.putPixel(image, 0, 0, 7);
+        assertEquals(7, BoundaryFill.getPixel(image, 0, 0));
+    }
+
+    @Test
+    void testBoundaryFill() {
+        BoundaryFill.boundaryFill(image, 2, 2, 5, 3);
+
+        int[][] expectedImage = {{0, 0, 0, 0, 0, 0, 0}, {0, 3, 3, 3, 3, 0, 0}, {0, 3, 5, 5, 3, 0, 0}, {0, 3, 5, 5, 3, 3, 3}, {0, 3, 3, 3, 5, 5, 3}, {0, 0, 0, 3, 5, 5, 3}, {0, 0, 0, 3, 3, 3, 3}};
+
+        for (int i = 0; i < image.length; i++) {
+            assertArrayEquals(expectedImage[i], image[i]);
+        }
+    }
+
+    @Test
+    void testBoundaryFillEdgeCase() {
+        BoundaryFill.boundaryFill(image, 1, 1, 3, 3);
+
+        int[][] expectedImage = {{0, 0, 0, 0, 0, 0, 0}, {0, 3, 3, 3, 3, 0, 0}, {0, 3, 0, 0, 3, 0, 0}, {0, 3, 0, 0, 3, 3, 3}, {0, 3, 3, 3, 0, 0, 3}, {0, 0, 0, 3, 0, 0, 3}, {0, 0, 0, 3, 3, 3, 3}};
+
+        for (int i = 0; i < image.length; i++) {
+            assertArrayEquals(expectedImage[i], image[i]);
+        }
+    }
+
+    @Test
+    void testBoundaryFillInvalidCoordinates() {
+        BoundaryFill.boundaryFill(image, -1, -1, 5, 3);
+
+        int[][] expectedImage = {{0, 0, 0, 0, 0, 0, 0}, {0, 3, 3, 3, 3, 0, 0}, {0, 3, 0, 0, 3, 0, 0}, {0, 3, 0, 0, 3, 3, 3}, {0, 3, 3, 3, 0, 0, 3}, {0, 0, 0, 3, 0, 0, 3}, {0, 0, 0, 3, 3, 3, 3}};
+
+        for (int i = 0; i < image.length; i++) {
+            assertArrayEquals(expectedImage[i], image[i]);
+        }
+    }
+}