[BAEL-3913] Prevent Application / CommandLineRunner classes from executing during JUnit testing (#8920)

* kkaravitis@gmail.com hexagonal architecture in java

* Removed evaluation article code

* Removed evaluation article code

* [BAEL-3913] Initial commit for prevent commandline application runner execution during JUnit test article

* [BAEL-3913] Fixed broken lines format and reduced the test method names length

* [BAEL-3913] Fixed broken lines format

spring-boot-modules/spring-boot-testing/src/test/java/com/baeldung/prevent/commandline/application/runner/execution/LoadSpringContextIntegrationTest.java

@@ -0,0 +1,43 @@
+package com.baeldung.prevent.commandline.application.runner.execution;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.springframework.boot.ApplicationRunner;
+import org.springframework.boot.CommandLineRunner;
+import org.springframework.boot.test.context.ConfigFileApplicationContextInitializer;
+import org.springframework.boot.test.mock.mockito.SpyBean;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit.jupiter.SpringExtension;
+
+import com.baeldung.prevent.commandline.application.runner.execution.ApplicationCommandLineRunnerApp;
+import com.baeldung.prevent.commandline.application.runner.execution.TaskService;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+
+@ExtendWith(SpringExtension.class)
+@ContextConfiguration(classes = { ApplicationCommandLineRunnerApp.class }, 
+  initializers = ConfigFileApplicationContextInitializer.class)
+public class LoadSpringContextIntegrationTest {
+    @SpyBean
+    TaskService taskService;
+
+    @SpyBean
+    CommandLineRunner commandLineRunner;
+
+    @SpyBean
+    ApplicationRunner applicationRunner;
+
+    @Test
+    void whenContextLoads_thenRunnersDoNotRun() throws Exception {
+        assertNotNull(taskService);
+        assertNotNull(commandLineRunner);
+        assertNotNull(applicationRunner);
+
+        verify(taskService, times(0)).execute(any());
+        verify(commandLineRunner, times(0)).run(any());
+        verify(applicationRunner, times(0)).run(any());
+    }
+}

spring-boot-modules/spring-boot-testing/src/test/java/com/baeldung/prevent/commandline/application/runner/execution/RunApplicationIntegrationTest.java

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+package com.baeldung.prevent.commandline.application.runner.execution;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.mock.mockito.SpyBean;
+
+import com.baeldung.prevent.commandline.application.runner.execution.ApplicationRunnerTaskExecutor;
+import com.baeldung.prevent.commandline.application.runner.execution.CommandLineTaskExecutor;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+
+@SpringBootTest
+class RunApplicationIntegrationTest {
+    @SpyBean
+    ApplicationRunnerTaskExecutor applicationRunnerTaskExecutor;
+    @SpyBean
+    CommandLineTaskExecutor commandLineTaskExecutor;
+
+    @Test
+    void whenContextLoads_thenRunnersRun() throws Exception {
+        verify(applicationRunnerTaskExecutor, times(1)).run(any());
+        verify(commandLineTaskExecutor, times(1)).run(any());
+    }
+}

spring-boot-modules/spring-boot-testing/src/test/java/com/baeldung/prevent/commandline/application/runner/execution/RunApplicationWithTestProfileIntegrationTest.java

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+package com.baeldung.prevent.commandline.application.runner.execution;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.NoSuchBeanDefinitionException;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.context.ApplicationContext;
+import org.springframework.test.context.ActiveProfiles;
+
+import com.baeldung.prevent.commandline.application.runner.execution.ApplicationRunnerTaskExecutor;
+import com.baeldung.prevent.commandline.application.runner.execution.CommandLineTaskExecutor;
+import com.baeldung.prevent.commandline.application.runner.execution.TaskService;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+@ActiveProfiles("test")
+@SpringBootTest
+class RunApplicationWithTestProfileIntegrationTest {
+    @Autowired
+    private ApplicationContext context;
+
+    @Test
+    void whenContextLoads_thenRunnersAreNotLoaded() {
+        assertNotNull(context.getBean(TaskService.class));
+        assertThrows(NoSuchBeanDefinitionException.class, 
+          () -> context.getBean(CommandLineTaskExecutor.class), 
+          "CommandLineRunner should not be loaded during this integration test");
+        assertThrows(NoSuchBeanDefinitionException.class, 
+          () -> context.getBean(ApplicationRunnerTaskExecutor.class), 
+          "ApplicationRunner should not be loaded during this integration test");
+    }
+}

spring-boot-modules/spring-boot-testing/src/test/java/com/baeldung/prevent/commandline/application/runner/execution/RunApplicationWithTestPropertiesIntegrationTest.java

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+package com.baeldung.prevent.commandline.application.runner.execution;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.NoSuchBeanDefinitionException;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.context.ApplicationContext;
+
+import com.baeldung.prevent.commandline.application.runner.execution.ApplicationRunnerTaskExecutor;
+import com.baeldung.prevent.commandline.application.runner.execution.CommandLineTaskExecutor;
+import com.baeldung.prevent.commandline.application.runner.execution.TaskService;
+
+@SpringBootTest(properties = { 
+  "command.line.runner.enabled=false", 
+  "application.runner.enabled=false" })
+class RunApplicationWithTestPropertiesIntegrationTest {
+    @Autowired
+    private ApplicationContext context;
+
+    @Test
+    void whenContextLoads_thenRunnersAreNotLoaded() {
+        assertNotNull(context.getBean(TaskService.class));
+        assertThrows(NoSuchBeanDefinitionException.class, 
+          () -> context.getBean(CommandLineTaskExecutor.class), 
+          "CommandLineRunner should not be loaded during this integration test");
+        assertThrows(NoSuchBeanDefinitionException.class, 
+          () -> context.getBean(ApplicationRunnerTaskExecutor.class), 
+          "ApplicationRunner should not be loaded during this integration test");
+    }
+}