java.lang.IllegalStateException:尚未创建临时文件夹
我正在为我的用例创建一个新的java.lang.IllegalStateException:尚未创建临时文件夹,java,junit,junit-rule,Java,Junit,Junit Rule,我正在为我的用例创建一个新的@规则,如下所示 public class ActiveDirectoryConfigurationRule extends ExternalResource { @Rule public TemporaryFolder temporaryFolder = new TemporaryFolder(); public File addActiveDirectoryConfigurationToFile(ActiveDirectoryConfigurati
@规则
,如下所示
public class ActiveDirectoryConfigurationRule extends ExternalResource {
@Rule
public TemporaryFolder temporaryFolder = new TemporaryFolder();
public File addActiveDirectoryConfigurationToFile(ActiveDirectoryConfiguration configuration) throws IOException {
File file = temporaryFolder.newFile();
objectMapper.writeValue(file, configuration);
return file;
}
private ObjectMapper registerJdk8ModuleAndGetObjectMapper() {
ObjectMapper objectMapper = new ObjectMapper();
objectMapper.registerModule(new Jdk8Module());
return objectMapper;
}
}
在我的测试中
我将其用作
public class ActiveDirectoryConfigurationStoreTest {
@Rule
public ActiveDirectoryConfigurationRule configurationRule = new ActiveDirectoryConfigurationRule();
@Test
public void getWhenConfigurationExists() throws Exception {
ActiveDirectoryConfiguration activeDirectoryConfiguration = //....;
File configurationToFile = configurationRule.addActiveDirectoryConfigurationToFile(activeDirectoryConfiguration);
ActiveDirectoryConfigurationStore configurationStore = new ActiveDirectoryConfigurationStore(configurationToFile);
Optional<ActiveDirectoryConfiguration> mayBeConfiguration = configurationStore.getConfiguration();
assertTrue(mayBeConfiguration.isPresent());
}
}
似乎在创建自己的@规则
时,我无法依赖任何现有的@规则
这就是问题所在吗?我该如何解决它呢?是的,我认为JUnit中没有内置任何东西可以让您像现在这样“嵌套”规则对象 我认为最明显的选择是:
临时文件夹
,而不是外部资源
,确保在覆盖的任何方法中调用super()
。这让你可以“做一个TemporaryFolder
做的每件事,然后做一些”,这也许不是完美的OO理论(因为它不是一种真正的TemporaryFolder),但应该按照你想要的方式工作。我在设置一个特定的文件夹时使用了这种方法,该文件夹需要为我的测试设置一个特定的环境,并且工作得相当好TemporaryFolder
引用,然后将其保存在字段中并根据需要使用。这要求@Rule的所有用户都包含两个@Rule对象,但也许可以清楚地表明,测试确实需要一个临时文件夹来完成它的工作,以及您的特定自定义设置不支持在规则内部声明带有
@Rule
的规则。但您可以手动运行另一条规则
public class ActiveDirectoryConfigurationRule implements TestRule {
private TemporaryFolder temporaryFolder = new TemporaryFolder();
@Override
public Statement apply(Statement base, Description description) {
Statement testWrappedWithYourCode = new Statement() {
public void evaluate() {
before();
List<Throwable> errors = new ArrayList<Throwable>();
try {
base.evaluate();
} catch (Throwable t) {
errors.add(t);
} finally {
try {
after();
} catch (Throwable t) {
errors.add(t);
}
}
MultipleFailureException.assertEmpty(errors);
}
}
return temporaryFolder.apply(testWrappedWithYourCode, description);
}
public File addActiveDirectoryConfigurationToFile(ActiveDirectoryConfiguration configuration) throws IOException {
File file = temporaryFolder.newFile();
objectMapper.writeValue(file, configuration);
return file;
}
private ObjectMapper registerJdk8ModuleAndGetObjectMapper() {
ObjectMapper objectMapper = new ObjectMapper();
objectMapper.registerModule(new Jdk8Module());
return objectMapper;
}
}
公共类ActiveDirectoryConfigurationRule实现TestRule{
private TemporaryFolder TemporaryFolder=新建TemporaryFolder();
@凌驾
公开声明应用(声明库、说明){
语句testWrappedWithYourCode=new语句(){
公共空间评估(){
在()之前;
列表错误=新建ArrayList();
试一试{
base.evaluate();
}捕获(可丢弃的t){
错误。添加(t);
}最后{
试一试{
在()之后;
}捕获(可丢弃的t){
错误。添加(t);
}
}
MultipleFailureException.assertEmpty(错误);
}
}
返回临时文件夹.apply(testWrappedWithYourCode,description);
}
公共文件addActiveDirectoryConfigurationToFile(ActiveDirectoryConfiguration配置)引发IOException{
File File=temporaryFolder.newFile();
objectMapper.writeValue(文件、配置);
返回文件;
}
私有对象映射器注册表jdk8moduleandgetObjectMapper(){
ObjectMapper ObjectMapper=新的ObjectMapper();
registerModule(新的Jdk8Module());
返回对象映射器;
}
}
Option#3听起来是最好的设计。但是,我认为这将很难实现:您希望保证先实例化了TemporaryFolder
,这样您就可以将其传递给您的自定义规则
。为此,JUnit有一个规则链
()。在这里,您可以定义顺序,但不能将一个实例传递给另一个实例的构造函数。真是进退两难!我认为选项1是实用的:覆盖apply(…)
,将语句
包装在TemporaryFolder
生成的语句周围,并在子规则后执行逻辑。我也喜欢这种方法3,我将阅读规则链
public class ActiveDirectoryConfigurationRule implements TestRule {
private TemporaryFolder temporaryFolder = new TemporaryFolder();
@Override
public Statement apply(Statement base, Description description) {
Statement testWrappedWithYourCode = new Statement() {
public void evaluate() {
before();
List<Throwable> errors = new ArrayList<Throwable>();
try {
base.evaluate();
} catch (Throwable t) {
errors.add(t);
} finally {
try {
after();
} catch (Throwable t) {
errors.add(t);
}
}
MultipleFailureException.assertEmpty(errors);
}
}
return temporaryFolder.apply(testWrappedWithYourCode, description);
}
public File addActiveDirectoryConfigurationToFile(ActiveDirectoryConfiguration configuration) throws IOException {
File file = temporaryFolder.newFile();
objectMapper.writeValue(file, configuration);
return file;
}
private ObjectMapper registerJdk8ModuleAndGetObjectMapper() {
ObjectMapper objectMapper = new ObjectMapper();
objectMapper.registerModule(new Jdk8Module());
return objectMapper;
}
}