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要测试Java中的split方法的正确性和稳定性,你可以编写一些单元测试用例来验证其功能。以下是一些建议的测试用例:
- 测试基本功能:
public static void main(String[] args) { String input = "Hello,World,Java,Split,Method"; String[] expectedOutput = {"Hello", "World", "Java", "Split", "Method"}; String[] actualOutput = input.split(","); assertArrayEquals(expectedOutput, actualOutput); }
- 测试空字符串输入:
public static void main(String[] args) { String input = ""; String[] expectedOutput = {}; String[] actualOutput = input.split(","); assertArrayEquals(expectedOutput, actualOutput); }
- 测试分隔符在字符串末尾的情况:
public static void main(String[] args) { String input = "Hello,World,Java,Split,Method,"; String[] expectedOutput = {"Hello", "World", "Java", "Split", "Method"}; String[] actualOutput = input.split(","); assertArrayEquals(expectedOutput, actualOutput); }
- 测试多个连续分隔符的情况:
public static void main(String[] args) { String input = "Hello,,World,,Java,,Split,,Method"; String[] expectedOutput = {"Hello", "", "World", "", "Java", "", "Split", "", "Method"}; String[] actualOutput = input.split(","); assertArrayEquals(expectedOutput, actualOutput); }
- 测试分隔符为正则表达式的特殊字符(如.*+?等)时的情况:
public static void main(String[] args) { String input = "Hello*World+Java?Split#Method"; String[] expectedOutput = {"Hello", "World", "Java", "Split", "Method"}; String[] actualOutput = input.split("[*+?#]"); assertArrayEquals(expectedOutput, actualOutput); }
- 测试输入为null的情况:
public static void main(String[] args) { String input = null; try { String[] output = input.split(","); } catch (NullPointerException e) { System.out.println("Passed: NullPointerException is thrown when input is null"); } }
通过这些测试用例,你可以验证Java split方法的正确性和稳定性。当然,你还可以根据需要添加更多的测试用例。