Java/src/test/java/com/thealgorithms/backtracking/FloodFillTest.java at master · TheAlgorithms/Java · GitHub

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packagecom.thealgorithms.backtracking;

importstaticorg.junit.jupiter.api.Assertions.assertArrayEquals;

importorg.junit.jupiter.api.Test;

classFloodFillTest {

@Test
voidtestForEmptyImage() {
int[][] image = {};
int[][] expected = {};

FloodFill.floodFill(image, 4, 5, 3, 2);
assertArrayEquals(expected, image);
 }

@Test
voidtestForSingleElementImage() {
int[][] image = {{1}};
int[][] expected = {{3}};

FloodFill.floodFill(image, 0, 0, 3, 1);
assertArrayEquals(expected, image);
 }

@Test
voidtestForImageOne() {
int[][] image = {
 {0, 0, 0, 0, 0, 0, 0},
 {0, 3, 3, 3, 3, 0, 0},
 {0, 3, 1, 1, 5, 0, 0},
 {0, 3, 1, 1, 5, 5, 3},
 {0, 3, 5, 5, 1, 1, 3},
 {0, 0, 0, 5, 1, 1, 3},
 {0, 0, 0, 3, 3, 3, 3},
 };

int[][] expected = {
 {0, 0, 0, 0, 0, 0, 0},
 {0, 3, 3, 3, 3, 0, 0},
 {0, 3, 2, 2, 5, 0, 0},
 {0, 3, 2, 2, 5, 5, 3},
 {0, 3, 5, 5, 2, 2, 3},
 {0, 0, 0, 5, 2, 2, 3},
 {0, 0, 0, 3, 3, 3, 3},
 };

FloodFill.floodFill(image, 2, 2, 2, 1);
assertArrayEquals(expected, image);
 }

@Test
voidtestForImageTwo() {
int[][] image = {
 {0, 0, 1, 1, 0, 0, 0},
 {1, 1, 3, 3, 3, 0, 0},
 {1, 3, 1, 1, 5, 0, 0},
 {0, 3, 1, 1, 5, 5, 3},
 {0, 3, 5, 5, 1, 1, 3},
 {0, 0, 0, 5, 1, 1, 3},
 {0, 0, 0, 1, 3, 1, 3},
 };

int[][] expected = {
 {0, 0, 2, 2, 0, 0, 0},
 {2, 2, 3, 3, 3, 0, 0},
 {2, 3, 2, 2, 5, 0, 0},
 {0, 3, 2, 2, 5, 5, 3},
 {0, 3, 5, 5, 2, 2, 3},
 {0, 0, 0, 5, 2, 2, 3},
 {0, 0, 0, 2, 3, 2, 3},
 };

FloodFill.floodFill(image, 2, 2, 2, 1);
assertArrayEquals(expected, image);
 }

@Test
voidtestForImageThree() {
int[][] image = {
 {1, 1, 2, 3, 1, 1, 1},
 {1, 0, 0, 1, 0, 0, 1},
 {1, 1, 1, 0, 3, 1, 2},
 };

int[][] expected = {
 {4, 4, 2, 3, 4, 4, 4},
 {4, 0, 0, 4, 0, 0, 4},
 {4, 4, 4, 0, 3, 4, 2},
 };

FloodFill.floodFill(image, 0, 1, 4, 1);
assertArrayEquals(expected, image);
 }

@Test
voidtestForSameNewAndOldColor() {
int[][] image = {{1, 1, 2}, {1, 0, 0}, {1, 1, 1}};

int[][] expected = {{1, 1, 2}, {1, 0, 0}, {1, 1, 1}};

FloodFill.floodFill(image, 0, 1, 1, 1);
assertArrayEquals(expected, image);
 }
}