Add a spring batch job test

This is a good template to create batch job tests in JUnit.

Author: Mandroide

complete/src/test/java/com/example/batchprocessing/BatchConfigurationTest.java

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+package com.example.batchprocessing;
+
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.springframework.batch.core.ExitStatus;
+import org.springframework.batch.core.Job;
+import org.springframework.batch.core.JobExecution;
+import org.springframework.batch.test.JobLauncherTestUtils;
+import org.springframework.batch.test.JobRepositoryTestUtils;
+import org.springframework.batch.test.context.SpringBatchTest;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.test.context.ActiveProfiles;
+import org.springframework.test.context.TestExecutionListeners;
+import org.springframework.test.context.support.DependencyInjectionTestExecutionListener;
+import org.springframework.test.context.support.DirtiesContextTestExecutionListener;
+
+@ActiveProfiles("test")
+@TestExecutionListeners({ DependencyInjectionTestExecutionListener.class,
+        DirtiesContextTestExecutionListener.class})
+// This is to avoid clashing of several JobRepository instances using the same data source for several test classes
+@DirtiesContext(classMode = DirtiesContext.ClassMode.AFTER_CLASS)
+@SpringBatchTest
+@SpringBootTest // This is required to be able to used spring boot features such as profiles
+class BatchConfigurationTest {
+
+    @Autowired
+    private JobLauncherTestUtils jobLauncherTestUtils;
+    @Autowired
+    private JobRepositoryTestUtils jobRepositoryTestUtils;
+    @Autowired
+    private Job importUserJob;
+
+    @BeforeEach
+    void setUp() {
+        jobLauncherTestUtils.setJob(importUserJob);
+    }
+
+    @AfterEach
+    void tearDown() {
+        jobRepositoryTestUtils.removeJobExecutions();
+    }
+
+    @Test
+    void importUserJob_WhenJobEnds_ThenStatusCompleted() throws Exception {
+        JobExecution jobExecution = jobLauncherTestUtils.launchJob();
+        Assertions.assertEquals(ExitStatus.COMPLETED, jobExecution.getExitStatus());
+    }
+}

complete/src/test/resources/application-test.yml

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+spring:
+  batch:
+    job:
+      enabled: false