Question

我有一个产生屏幕截图的课程：

@Component
public class ImagesHandlerImpl implements ImagesHandler {
    ....
    public boolean doScreen() throws IOException, AWTException {
        final Rectangle rectangle = new Rectangle(Toolkit.getDefaultToolkit().getScreenSize());
        ...
    }
}

我的应用使用spring boot创建，我需要对其进行测试。但我得到java.awt.HeadlessException

我的测试：

@RunWith(SpringRunner.class) 
@SpringBootTest(classes = ImagesHandlerImpl.class) 
@ContextConfiguration(classes = App.class) 
public class ImagesHandlerImplTest { 
    ...
    @Test
    public void whenDoScreenThenFilenameLikeTemplate() throws IOException, AWTException {
        imagesHandler.doScreen();
        final String name = dir.listFiles()[0].getName();
        assertThat("SCREEN_0", is(name));
    }
}

我尝试阻止HeadlessException：

@SpringBootApplication
public class App {
    public static void main(String[] args) {
        SpringApplicationBuilder builder = new SpringApplicationBuilder(App.class);
        builder.headless(false).run(args);
    }
}

我使用的是spring-boot版本1.5.6.RELEASE。

但它没有帮助。我得到了日志：

ava.awt.HeadlessException at sun.awt.HeadlessToolkit.getScreenSize（HeadlessToolkit.java:284）at at org.robinhood.image.ImagesHandlerImpl.doScreen（ImagesHandlerImpl.java:42）在 org.robinhood.image.ImagesHandlerImplTest.whenDoScreenThenCreatePrintScreen（ImagesHandlerImplTest.java:51） at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method）at sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:62）在 sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）在java.lang.reflect.Method.invoke（Method.java:498）at org.junit.runners.model.FrameworkMethod $ 1.runReflectiveCall（FrameworkMethod.java:50）在 org.junit.internal.runners.model.ReflectiveCallable.run（ReflectiveCallable.java:12）在 org.junit.runners.model.FrameworkMethod.invokeExplosively（FrameworkMethod.java:47）在 org.junit.internal.runners.statements.InvokeMethod.evaluate（InvokeMethod.java:17）在 org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate（RunBeforeTestMethodCallbacks.java:75）在 org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate（RunAfterTestMethodCallbacks.java:86）在 org.springframework.test.context.junit4.statements.SpringRepeat.evaluate（SpringRepeat.java:84）在org.junit.runners.ParentRunner.runLeaf（ParentRunner.java:325）at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild（SpringJUnit4ClassRunner.java:252）在 org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild（SpringJUnit4ClassRunner.java:94）在org.junit.runners.ParentRunner $ 3.run（ParentRunner.java:290）at at org.junit.runners.ParentRunner $ 1.schedule（ParentRunner.java:71）at at org.junit.runners.ParentRunner.runChildren（ParentRunner.java:288）at at org.junit.runners.ParentRunner.access $ 000（ParentRunner.java:58）at at org.junit.runners.ParentRunner $ 2.evaluate（ParentRunner.java:268）at at org.junit.internal.runners.statements.RunBefores.evaluate（RunBefores.java:26）在 org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate（RunBeforeTestClassCallbacks.java:61）在 org.junit.internal.runners.statements.RunAfters.evaluate（RunAfters.java:27）在 org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate（RunAfterTestClassCallbacks.java:70）在org.junit.runners.ParentRunner.run（ParentRunner.java:363）at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run（SpringJUnit4ClassRunner.java:191）在org.junit.runner.JUnitCore.run（JUnitCore.java:137）at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs（JUnit4IdeaTestRunner.java:68）在 com.intellij.rt.execution.junit.IdeaTestRunner $ Repeater.startRunnerWithArgs（IdeaTestRunner.java:47）在 com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart（JUnitStarter.java:242）在 com.intellij.rt.execution.junit.JUnitStarter.main（JUnitStarter.java:70）

帮帮我。如何解决这个问题？谢谢！

Answer 1

春季测试跑步者不会调用main method的{{1}}。它默认情况下会启用Headless mode。

您可以指定JVM参数App class来执行测试用例。另一个解决方案是在bean初始化期间设置属性。

-Djava.awt.headless=false

Answer 2

添加

// overcome @SpringBootTest setup
System.setProperty("java.awt.headless", "false")

在doScreen()方法调用之前。

如何使用SpringBoot测试awt。*？

2 个答案: