Junit test case files

Author: premaseem

src/junittests/ExecutionProcedureJunit.java

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+package junittests;
+
+import org.junit.After;
+import org.junit.AfterClass;
+
+import org.junit.Before;
+import org.junit.BeforeClass;
+
+import org.junit.Ignore;
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+
+public class ExecutionProcedureJunit {
+
+    //execute only once, in the starting
+    @BeforeClass
+    public static void beforeClass() {
+        System.out.println("in before class");
+    }
+
+    //execute only once, in the end
+    @AfterClass
+    public static void  afterClass() {
+        System.out.println("in after class");
+    }
+
+    //execute for each test, before executing test
+    @Before
+    public void before() {
+        System.out.println("in before");
+    }
+
+    //execute for each test, after executing test
+    @After
+    public void after() {
+        System.out.println("in after");
+    }
+
+    //test case 1
+    @Test
+    public void testCase1() {
+        System.out.println("in test case 1");
+    }
+
+    //test case 2
+    @Test(timeout = 1000)
+    public void testCase2() {
+        System.out.println("in test case 2");
+    }
+    @Test(expected = ArithmeticException.class)
+    public void testPrintMessage() {
+        System.out.println("Inside testPrintMessage()");
+        int a = 1/0;
+        assertEquals(a,1);
+    }
+}

src/junittests/JunitTestSuite.java

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+package junittests;
+
+import org.junit.runner.RunWith;
+import org.junit.runners.Suite;
+
+//JUnit Suite Test
+@RunWith(Suite.class)
+
+@Suite.SuiteClasses({
+        TestJunit1.class ,TestJunit2.class
+})
+
+public class JunitTestSuite {
+}

src/junittests/MessageUtil.java

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+package junittests;
+
+public class MessageUtil {
+    private String message;
+
+    //Constructor
+    //@param message to be printed
+
+    public MessageUtil(String message){
+        this.message = message;
+    }
+
+    // prints the message
+    public String printMessage(){
+        System.out.println(message);
+        return message;
+    }
+}

src/junittests/PrimeNumberCheckerTest.java

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+package junittests;
+
+import java.util.Arrays;
+import java.util.Collection;
+
+import org.junit.Test;
+import org.junit.Before;
+
+import org.junit.runners.Parameterized;
+import org.junit.runners.Parameterized.Parameters;
+import org.junit.runner.RunWith;
+import static org.junit.Assert.assertEquals;
+
+@RunWith(Parameterized.class)
+public class PrimeNumberCheckerTest {
+    private Integer inputNumber;
+    private Boolean expectedResult;
+    private PrimeNumberChecker primeNumberChecker;
+
+    @Before
+    public void initialize() {
+        primeNumberChecker = new PrimeNumberChecker();
+    }
+
+    // Each parameter should be placed as an argument here
+    // Every time runner triggers, it will pass the arguments
+    // from parameters we defined in primeNumbers() method
+
+    public PrimeNumberCheckerTest(Integer inputNumber, Boolean expectedResult) {
+        this.inputNumber = inputNumber;
+        this.expectedResult = expectedResult;
+    }
+
+    @Parameterized.Parameters
+    public static Collection primeNumbers() {
+        return Arrays.asList(new Object[][] {
+                { 2, true },
+                { 6, false },
+                { 19, true },
+                { 22, false },
+                { 23, true }
+        });
+    }
+
+    // This test will run 4 times since we have 5 parameters defined
+    @Test
+    public void testPrimeNumberChecker() {
+        System.out.println("Parameterized Number is : " + inputNumber);
+        assertEquals(expectedResult,
+                primeNumberChecker.validate(inputNumber));
+    }
+}
+
+class PrimeNumberChecker {
+    public Boolean validate(final Integer primeNumber) {
+        for (int i = 2; i < (primeNumber / 2); i++) {
+            if (primeNumber % i == 0) {
+                return false;
+            }
+        }
+        return true;
+    }
+}

src/junittests/TestJunit.java

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+package junittests;
+
+import junit.framework.TestCase;
+import org.junit.Test;
+
+public class TestJunit extends TestCase {
+    protected int value1, value2;
+
+    // assign values in setup
+
+    protected void setUp(){
+        value1= 2;
+        value2 = 4;
+    }
+
+    protected void tearDown(){
+        value1= 0;
+        value2 = 0;
+    }
+
+    @Test
+    public void testAdd() {
+        String str = "Junit is working fine";
+        assertEquals("Junit is working fine",str);
+    }
+
+    @Test
+    public void testAdd1() {
+        String str = "Junit is working fine";
+        assertEquals("Junit is working fine",str);
+    }
+}

src/junittests/TestJunit1.java

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+package junittests;
+
+import org.junit.Test;
+import org.junit.Ignore;
+import static org.junit.Assert.assertEquals;
+
+public class TestJunit1 {
+
+    String message = "Robert";
+    MessageUtil messageUtil = new MessageUtil(message);
+
+    @Test
+    public void testPrintMessage() {
+        System.out.println("Inside testPrintMessage()");
+        assertEquals(message, messageUtil.printMessage());
+    }
+}

src/junittests/TestJunit2.java

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+package junittests;
+
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+
+public class TestJunit2 {
+
+    String message = "Robert";
+    MessageUtil messageUtil = new MessageUtil(message);
+
+    @Test
+    public void testPrintMessage() {
+        System.out.println("Inside testPrintMessage()");
+        assertEquals(message, messageUtil.printMessage());
+    }
+}

src/junittests/TestRunner.java

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+package junittests;
+
+import org.junit.runner.JUnitCore;
+import org.junit.runner.Result;
+import org.junit.runner.notification.Failure;
+
+public class TestRunner {
+    public static void main(String[] args) {
+        Result result = JUnitCore.runClasses(TestJunit2.class,TestJunit1.class);
+
+        for (Failure failure : result.getFailures()) {
+            System.out.println(failure.toString());
+        }
+
+        System.out.println(result.wasSuccessful());
+    }
+}