Test cases for examples in article "A guide to Java 8 forEach" (#769)

* An example of a test using a WebAppConfiguration annotation

* Giving the test the appropriate formatting

* A example of a test that uses WebAppConfiguration without the need of a MockMvc object

* Adding model class and test cases class to show the use of the forEach loop.
For article "A guide to Java 8 forEach"

* Examples used in article "Guide to Java 8 forEach"

core-java/src/test/java/com/baeldung/java8/Java8ForEachTest.java

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+package com.baeldung.java8;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.function.Consumer;
+
+import org.junit.Test;
+
+public class Java8ForEachTest {
+
+    @Test
+    public void compareForEachMethods_thenPrintResults() {
+
+        List<String> names = new ArrayList<>();
+        names.add("Larry");
+        names.add("Steve");
+        names.add("James");
+        names.add("Conan");
+        names.add("Ellen");
+
+        // Java 5 - for-loop
+        System.out.println("--- Enhanced for-loop ---");
+        for (String name : names) {
+            System.out.println(name);
+        }
+
+        // Java 8 - forEach
+        System.out.println("--- forEach method ---");
+        names.forEach(name -> System.out.println(name));
+
+        // Anonymous inner class that implements Consumer interface
+        System.out.println("--- Anonymous inner class ---");
+        names.forEach(new Consumer<String>() {
+            public void accept(String name) {
+                System.out.println(name);
+            }
+        });
+
+        // Create a Consumer implementation to then use in a forEach method
+        Consumer<String> consumerNames = name -> {
+            System.out.println(name);
+        };
+        System.out.println("--- Implementation of Consumer interface ---");
+        names.forEach(consumerNames);
+
+        // Print elements using a Method Reference
+        System.out.println("--- Method Reference ---");
+        names.forEach(System.out::println);
+
+    }
+
+}

spring-mvc-java/src/test/java/com/baeldung/web/controller/EmployeeTestWithoutMockMvc.java

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+package com.baeldung.web.controller;
+
+import org.junit.Before;
+import org.junit.Assert;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.web.WebAppConfiguration;
+
+import com.baeldung.model.Employee;
+import com.baeldung.spring.web.config.WebConfig;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@WebAppConfiguration
+@ContextConfiguration(classes = WebConfig.class)
+public class EmployeeTestWithoutMockMvc {
+
+    @Autowired
+    private EmployeeController employeeController;
+
+    @Before
+    public void setup() {
+        employeeController.initEmployees();
+    }
+
+    @Test
+    public void whenInitEmployees_thenVerifyValuesInitiation() {
+
+        Employee employee1 = employeeController.employeeMap.get(1L);
+        Employee employee2 = employeeController.employeeMap.get(2L);
+        Employee employee3 = employeeController.employeeMap.get(3L);
+
+        Assert.assertTrue(employee1.getId() == 1L);
+        Assert.assertTrue(employee1.getName().equals("John"));
+        Assert.assertTrue(employee1.getContactNumber().equals("223334411"));
+        Assert.assertTrue(employee1.getWorkingArea().equals("rh"));
+
+        Assert.assertTrue(employee2.getId() == 2L);
+        Assert.assertTrue(employee2.getName().equals("Peter"));
+        Assert.assertTrue(employee2.getContactNumber().equals("22001543"));
+        Assert.assertTrue(employee2.getWorkingArea().equals("informatics"));
+
+        Assert.assertTrue(employee3.getId() == 3L);
+        Assert.assertTrue(employee3.getName().equals("Mike"));
+        Assert.assertTrue(employee3.getContactNumber().equals("223334411"));
+        Assert.assertTrue(employee3.getWorkingArea().equals("admin"));
+    }
+
+}