example of @SpringBootTest

demo-spring-testing/src/it/java/com/examples/spring/demo/services/EmployeeServiceWithMockBeanSpringBootTestIT.java

@@ -0,0 +1,57 @@
+package com.examples.spring.demo.services;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.Assert.assertNull;
+import static org.mockito.BDDMockito.given;
+import static org.mockito.Mockito.verify;
+
+import java.util.Arrays;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.mock.mockito.MockBean;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import com.examples.spring.demo.model.Employee;
+import com.examples.spring.demo.repositories.EmployeeRepository;
+import com.examples.spring.demo.services.EmployeeService;
+
+/**
+ * Uses Spring dependency injection, to inject (in the Spring sense) mocked
+ * beans (that can then be stubbed with Mockito); {@link SpringBootTest}
+ * loads the complete application context for dependency injection.
+ * 
+ * Just a demonstration of {@link SpringBootTest}; it doesn't make much sense
+ * to use it with mocking.
+ */
+@RunWith(SpringRunner.class)
+@SpringBootTest
+public class EmployeeServiceWithMockBeanSpringBootTestIT {
+
+	@MockBean
+	private EmployeeRepository employeeRepository;
+
+	@Autowired
+	private EmployeeService employeeService;
+
+	@Test
+	public void test_getMaxSalariedEmployee_withNoEmployees() {
+		assertNull(employeeService.getMaxSalariedEmployee());
+		verify(employeeRepository).findAll();
+	}
+
+	@Test
+	public void test_getMaxSalariedEmployee_withEmployees() {
+		given(employeeRepository.findAll()).
+			willReturn(Arrays.asList(
+				new Employee(1, "first", 1000),
+				new Employee(2, "second", 5000),
+				new Employee(3, "third", 2000)
+			));
+		assertThat(employeeService.getMaxSalariedEmployee().getName()).
+			isEqualTo("second");
+		verify(employeeRepository).findAll();
+	}
+}