Mock call object method (Mockito Junit5 Spring)
I try to mock the thymeleaf template engine.
My test class:
@ExtendWith(MockitoExtension.class) @RunWith(JUnitPlatform.class) public class MailServiceTest { @InjectMocks private MailService mailService; @Mock private JavaMailSender mailSender; @Mock private TemplateEngine templateEngine; @BeforeEach public void setMockOutput() { doReturn("<html>Template processed String</html>").when(templateEngine.process(any(String.class), any(IContext.class))); } @Test public void testNewMailBoxMail() throws MessagingException, IOException { mailService.newMailBoxMail("M.", "nom", "[email protected]"); ... } I got a lot of trouble with the process method parameter (org.mockito.exceptions.misusing.InvalidUseOfMatchersException) and I’m not sure that they are OK.
As the test reach the doReturn line I get
java.lang.IllegalArgumentException: Template cannot be null at org.thymeleaf.util.Validate.notNull(Validate.java:37) at org.thymeleaf.TemplateSpec.<init>(TemplateSpec.java:314) at org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1048) at fr.strasbourg.accountManagement.service.MailServiceTest.setMockOutput(MailServiceTest.java:50) 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 org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:515) at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:115) at org.junit.jupiter.engine.descriptor.ClassTestDescriptor.invokeMethodInExtensionContext(ClassTestDescriptor.java:436) at org.junit.jupiter.engine.descriptor.ClassTestDescriptor.lambda$synthesizeBeforeEachMethodAdapter$14(ClassTestDescriptor.java:424) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeBeforeEachMethods$2(TestMethodTestDescriptor.java:136) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:72) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeBeforeMethodsOrCallbacksUntilExceptionOccurs(TestMethodTestDescriptor.java:156) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeBeforeEachMethods(TestMethodTestDescriptor.java:135) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:110) at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:59) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:105) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:72) at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:95) at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:71) at java.util.ArrayList.forEach(ArrayList.java:1249) at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:110) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:72) at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:95) at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:71) at java.util.ArrayList.forEach(ArrayList.java:1249) at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38) at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:110) at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:72) at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:95) at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:71) at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:32) at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57) at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:51) at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:170) at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:154) at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:90) at org.junit.platform.runner.JUnitPlatform.run(JUnitPlatform.java:139) at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:89) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:41) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:542) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:770) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:464) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:210) Can somebody help my to mock Thymeleaf template engine?
Thank Dominique
The template engine is injected as bean in the MailService object. Here is the MailService code:
@Service public class MailService { @Autowired private JavaMailSender mailSender; @Autowired private TemplateEngine templateEngine; private static final String SUPPORT_EMAIL_ADDRESS = "[email protected]"; public void newMailBoxMail(String pCivility, String pName, String pEmailAddress) throws MessagingException { // template context (model) final Context vContext = new Context(); vContext.setVariable("civility", pCivility); vContext.setVariable("name", pName); vContext.setVariable("email", pEmailAddress); // create HTML from template final String vHtmlContent = templateEngine.process("html/NewMailbox.html", vContext); // create mail MimeMessage vMimeMessage = mailSender.createMimeMessage(); MimeMessageHelper vMessage = new MimeMessageHelper(vMimeMessage, "UTF-8"); vMessage.setSubject("Charte messagerie"); vMessage.setFrom(SUPPORT_EMAIL_ADDRESS); vMessage.setTo(pEmailAddress); vMessage.setText(vHtmlContent, true); // send mail mailSender.send(vMimeMessage); } } 
