尝试使用 IntelliJ IDEA 学习 JUnit 5。创建了一个测试类并尝试测试一种方法。这是消息(见第三行):
INFO: Discovered TestEngines with IDs: [junit-jupiter]
Internal Error occurred.
org.junit.platform.commons.util.PreconditionViolationException:'DirectoryTest#directory2bytes' could not be resolved to a unique method
at org.junit.platform.engine.discovery.DiscoverySelectors.lambda$selectMethod$1(DiscoverySelectors.java:131)
at java.util.Optional.orElseThrow(Optional.java:290)
at org.junit.platform.engine.discovery.DiscoverySelectors.selectMethod(DiscoverySelectors.java:130)
at com.intellij.junit5.JUnit5TestRunnerUtil.createSelector(JUnit5TestRunnerUtil.java:111)
at com.intellij.junit5.JUnit5TestRunnerUtil.buildRequest(JUnit5TestRunnerUtil.java:86)
at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:46)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:51)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:237)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)
Process finished with exit code 254
Empty test suite.
我不明白为什么无法解决该方法:它可以编译并且肯定存在:
@Test
void directory2bytes( ) {
testBytes = testDir.directory2bytes();
for( int i = 0; i <= 10; i++) {
System.out.print( testBytes[i] + " ")
}
System.out.println( );
}
我已经定义了这个:
@BeforeEach
void setUp( ) {
testDir = new Directory( )
testBytes = new byte[1000];
}
更新:退出并重新启动 IntelliJ IDEA,我现在收到无法解析导入符号“junit”的消息,以及各种注释“@beforeEach”、“afterEach”和“Test”。
更新 2:在测试类中找到并修复了一个丢失的分号,但没有变化。注意:在我没有测试的一些类中存在编译错误,但我将测试运行配置设置为“构建,无错误检查”。这是正确的吗?我还尝试使用 JUnit 4 创建相同的测试(具有不同的类名),但这也不起作用。
以下是错误消息的前几行:
Dec 07, 2016 9:51:41 AM org.junit.platform.launcher.core.ServiceLoaderTestEngineRegistry loadTestEngines
INFO: Discovered TestEngines with IDs: [junit-jupiter, junit-vintage]
Internal Error occurred.
org.junit.platform.commons.util.PreconditionViolationException: Could not load class with name: DirectoryTest
at org.junit.platform.engine.discovery.MethodSelector.lambda$lazyLoadJavaClass$0(MethodSelector.java:154)