模拟 java.time.format.DateTimeFormatter 类
我正在尝试模拟 DateTimeFormatter 类.我做了以下事情:
I'm trying to mock the DateTimeFormatter class. I've done the following:
@RunWith(PowerMockRunner.class)
@PrepareForTest({DateTimeFormatter.class})
public class UnitTest {
private DateTimeFormatter mockDateFormatter;
private AwesomeClass awesomeClass;
@Before
public void setUp() {
mockDateFormatter = PowerMockito.mock(DateTimeFormatter.class);
awesomeClass = new AwesomeClass(mockDateFormatter);
}
@Test
public void shouldToTestSomethingAwesome() {
// Other test code
PowerMockito.when(mockDateFormatter.format(any(LocalDate.class)))
.thenReturn("20150224");
// Other test code
}
AwesomeClass 使用它来格式化 LocalDateTime.now(ZoneId.of("UTC"));.然后，格式化的字符串进一步用于生成另一个字符串.我需要确保正确生成字符串.所以我需要从格式化程序返回一致的日期或模拟 LocalDateTime.now(..) 静态方法
AwesomeClass uses it to format LocalDateTime.now(ZoneId.of("UTC"));. The formatted string is then further used to generate another string. I need to ensure that the string is properly generated. So I need to return a consistent date from either the formatter or mock the LocalDateTime.now(..) static method
我做错了什么?
推荐答案
模拟 LocalDateTime.now() 的替代方法是将时钟注入您的类并更改(或添加另一个)构造函数像这样:
An alternative to mocking LocalDateTime.now() is to inject the clock into your class and change your (or add another) constructor like this:
AwesomeClass(DateTimeFormatter fmt, Clock clock) {
//instead of LocalDateTime now = LocalDateTime.now():
LocalDateTime now = LocalDateTime.now(clock);
}
然后在你的测试中:
new AwesomeClass(formatter, Clock.fixed(the time you want here));
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