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L2022211820_8_Test.java
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import edu.hit.Solution8;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.assertEquals;
public class L2022211820_8_Test {
// 测试用例设计的总体原则:等价类划分原则,即对于输入的每个可能值,都设计一个测试用例来验证其正确性。
@Test
public void testNumIslands_case1() {
// 测试目的:验证给定示例1的正确性
char[][] grid = {
{'1', '1', '1', '1', '0'},
{'1', '1', '0', '1', '0'},
{'1', '1', '0', '0', '0'},
{'0', '0', '0', '0', '0'}
};
Solution8 solution = new Solution8();
int result = solution.numIslands(grid);
assertEquals(1, result); // 预期输出为1
}
@Test
public void testNumIslands_case2() {
// 测试目的:验证给定示例2的正确性
char[][] grid = {
{'1', '1', '0', '0', '0'},
{'1', '1', '0', '0', '0'},
{'0', '0', '1', '0', '0'},
{'0', '0', '0', '1', '1'}
};
Solution8 solution = new Solution8();
int result = solution.numIslands(grid);
assertEquals(3, result); // 预期输出为3
}
@Test
public void testNumIslands_case3() {
// 测试目的:验证空网格的情况
char[][] grid = {};
Solution8 solution = new Solution8();
int result = solution.numIslands(grid);
assertEquals(0, result); // 预期输出为0
}
}