用JAVA写一个可以计算下一天日期的函数nextDate() 1. 编制使用白盒测试方法测试nextDate()函数的测试计划； • 2. 写出详细的使用代码检查法、逻辑覆盖法、基本路径测试法对函数 nextDate()进行测试的过程

1. 下面是使用白盒测试方法测试nextDate()函数的测试计划：

1.1 使用代码检查法
- 检查代码是否存在语法错误。
- 检查函数是否正确地处理边界条件。
- 检查函数是否正确计算下一天的日期。

1.2 使用逻辑覆盖法
- 确保测试用例能够覆盖所有的分支和条件语句。
- 确保测试用例能够覆盖所有可能的输入值。

1.3 使用基本路径测试法
- 确保测试用例能够覆盖所有可能的路径。
- 确保测试用例能够覆盖所有的分支和条件语句。

2. 下面是详细的使用代码检查法、逻辑覆盖法、基本路径测试法对函数 nextDate() 进行测试的过程：

2.1 使用代码检查法
首先，我们需要检查代码是否存在语法错误，可以使用编译器或者IDE自带的语法检查工具进行检查。
接下来，我们需要编写测试用例，确保函数正确地处理边界条件。例如，如果输入的日期是2月28日，那么下一天应该是3月1日，而如果输入的日期是2月29日，那么下一天应该是3月1日。我们可以编写以下测试用例进行检查：

@Test
public void testNextDate() {
// test boundary condition
assertEquals("Invalid input", nextDate(0, 0, 0));
assertEquals("Invalid input", nextDate(13, 32, 2019));
assertEquals("Invalid input", nextDate(2, 29, 2019));
assertEquals("Invalid input", nextDate(4, 31, 2019));
assertEquals("Invalid input", nextDate(6, 31, 2019));
assertEquals("Invalid input", nextDate(9, 31, 2019));
assertEquals("Invalid input", nextDate(11, 31, 2019));
assertEquals("Invalid input", nextDate(2, 28, -1));
assertEquals("Invalid input", nextDate(3, 1, 10000));
}

然后，我们还需要编写测试用例，确保函数正确计算下一天的日期。例如，如果输入的日期是2019年3月31日，那么下一天应该是4月1日。我们可以编写以下测试用例进行检查：

@Test
public void testNextDate() {
// test boundary condition
assertEquals("Invalid input", nextDate(0, 0, 0));
assertEquals("Invalid input", nextDate(13, 32, 2019));
assertEquals("Invalid input", nextDate(2, 29, 2019));
assertEquals("Invalid input", nextDate(4, 31, 2019));
assertEquals("Invalid input", nextDate(6, 31, 2019));
assertEquals("Invalid input", nextDate(9, 31, 2019));
assertEquals("Invalid input", nextDate(11, 31, 2019));
assertEquals("Invalid input", nextDate(2, 28, -1));
assertEquals("Invalid input", nextDate(3, 1, 10000));

// test next day
assertEquals("Next day is 1/1/2019", nextDate(12, 31, 2018));
assertEquals("Next day is 2/28/2019", nextDate(2, 27, 2019));
assertEquals("Next day is 3/1/2019", nextDate(2, 28, 2019));
assertEquals("Next day is 4/1/2019", nextDate(3, 31, 2019));
assertEquals("Next day is 5/1/2019", nextDate(4, 30, 2019));
assertEquals("Next day is 6/1/2019", nextDate(5, 31, 2019));
assertEquals("Next day is 7/1/2019", nextDate(6, 30, 2019));
assertEquals("Next day is 8/1/2019", nextDate(7, 31, 2019));
assertEquals("Next day is 9/1/2019", nextDate(8, 31, 2019));
assertEquals("Next day is 10/1/2019", nextDate(9, 30, 2019));
assertEquals("Next day is 11/1/2019", nextDate(10, 31, 2019));
assertEquals("Next day is 12/1/2019", nextDate(11, 30, 2019));
}

2.2 使用逻辑覆盖法
我们需要确保测试用例能够覆盖所有的分支和条件语句。例如，如果输入的月份是2月，那么我们需要测试以下几种情况：

- 年份能够被4整除但不能被100整除，这种情况下2月份有29天。
- 年份能够被400整除，这种情况下2月份有29天。
- 其他情况下，2月份有28天。

我们可以编写以下测试用例进行检查：

@Test
public void testNextDate() {
// test boundary condition
assertEquals("Invalid input", nextDate(0, 0, 0));
assertEquals("Invalid input", nextDate(13, 32, 2019));
assertEquals("Invalid input", nextDate(2, 29, 2019));
assertEquals("Invalid input", nextDate(4, 31, 2019));
assertEquals("Invalid input", nextDate(6, 31, 2019));
assertEquals("Invalid input", nextDate(9, 31, 2019));
assertEquals("Invalid input", nextDate(11, 31, 2019));
assertEquals("Invalid input", nextDate(2, 28, -1));
assertEquals("Invalid input", nextDate(3, 1, 10000));

// test next day
assertEquals("Next day is 1/1/2019", nextDate(12, 31, 2018));
assertEquals("Next day is 2/28/2019", nextDate(2, 27, 2019));
assertEquals("Next day is 3/1/2019", nextDate(2, 28, 2019));
assertEquals("Next day is 4/1/2019", nextDate(3, 31, 2019));
assertEquals("Next day is 5/1/2019", nextDate(4, 30, 2019));
assertEquals("Next day is 6/1/2019", nextDate(5, 31, 2019));
assertEquals("Next day is 7/1/2019", nextDate(6, 30, 2019));
assertEquals("Next day is 8/1/2019", nextDate(7, 31, 2019));
assertEquals("Next day is 9/1/2019", nextDate(8, 31, 2019));
assertEquals("Next day is 10/1/2019", nextDate(9, 30, 2019));
assertEquals("Next day is 11/1/2019", nextDate(10, 31, 2019));
assertEquals("Next day is 12/1/2019", nextDate(11, 30, 2019));

// test leap year
assertEquals("Next day is 2/29/2020", nextDate(2, 28, 2020));
assertEquals("Next day is 3/1/2020", nextDate(2, 29, 2020));
assertEquals("Next day is 2/28/1900", nextDate(2, 27, 1900));
assertEquals("Next day is 3/1/1900", nextDate(2, 28, 1900));
assertEquals("Next day is 2/28/2000", nextDate(2, 27, 2000));
assertEquals("Next day is 2/29/2000", nextDate(2, 28, 2000));
}

2.3 使用基本路径测试法
我们需要确保测试用例能够覆盖所有可能的路径。例如，如果输入的年份小于1或者大于10000，那么函数应该返回"Invalid input"。如果输入的月份小于1或者大于12，那么函数应该返回"Invalid input"。如果输入的日期小于1或者大于该月份的天数，那么函数应该返回"Invalid input"。我们可以编写以下测试用例进行检查：

@Test
public void testNextDate() {
// test boundary condition
assertEquals("Invalid input", nextDate(0, 0, 0));
assertEquals("Invalid input", nextDate(13, 32, 2019));
assertEquals("Invalid input", nextDate(2, 29, 2019));
assertEquals("Invalid input", nextDate(4, 31, 2019));
assertEquals("Invalid input", nextDate(6, 31, 2019));
assertEquals("Invalid input", nextDate(9, 31, 2019));
assertEquals("Invalid input", nextDate(11, 31, 2019));
assertEquals("Invalid input", nextDate(2, 28, -1));
assertEquals("Invalid input", nextDate(3, 1, 10000));

// test next day
assertEquals("Next day is 1/1/2019", nextDate(12, 31, 2018));
assertEquals("Next day is 2/28/2019", nextDate(2, 27, 2019));
assertEquals("Next day is 3/1/2019", nextDate(2, 28, 2019));
assertEquals("Next day is 4/1/2019", nextDate(3, 31, 2019));
assertEquals("Next day is 5/1/2019", nextDate(4, 30, 2019));
assertEquals("Next day is 6/1/2019", nextDate(5, 31, 2019));
assertEquals("Next day is 7/1/2019", nextDate(6, 30, 2019));
assertEquals("Next day is 8/1/2019", nextDate(7, 31, 2019));
assertEquals("Next day is 9/1/2019", nextDate(8, 31, 2019));
assertEquals("Next day is 10/1/2019", nextDate(9, 30, 2019));
assertEquals("Next day is 11/1/2019", nextDate(10, 31, 2019));
assertEquals("Next day is 12/1/2019", nextDate(11, 30, 2019));

// test leap year
assertEquals("Next day is 2/29/2020", nextDate(2, 28, 2020));
assertEquals("Next day is 3/1/2020", nextDate(2, 29, 2020));
assertEquals("Next day is 2/28/1900", nextDate(2, 27, 1900));
assertEquals("Next day is 3/1/1900", nextDate(2, 28, 1900));
assertEquals("Next day is 2/28/2000", nextDate(2, 27, 2000));
assertEquals("Next day is 2/29/2000", nextDate(2, 28, 2000));
}