worked on test cases for calculator add function, added test runner, annotated...

worked on test cases for calculator add function, added test runner, annotated test runner, results and test class

junit-demo/src/main/java/com/calculator/Calculator.java

+package com.calculator;
+
+public class Calculator {
+
+    public int add(int a, int b) {
+        return a + b;
+    }
+
+}

junit-demo/src/test/java/com/calculator/AnnotatedTestRunner.java

+package com.calculator;
+
+import org.junit.runner.RunWith;
+import org.junit.runners.Suite;
+
+@RunWith(Suite.class)
+@Suite.SuiteClasses({CalculatorTest.class, SampleTestClass.class, TestResultClass.class})
+public class AnnotatedTestRunner {
+
+}

junit-demo/src/test/java/com/calculator/CalculatorTest.java

+package com.calculator;
+
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+
+public class CalculatorTest {
+
+    @Test
+    public void addTest() {
+        int result = new Calculator().add(10, 10);
+        assertEquals("Failed", 20, result);
+    }
+}

junit-demo/src/test/java/com/calculator/SampleTestClass.java

+package com.calculator;
+
+import org.junit.*;
+
+import static org.junit.Assert.assertTrue;
+
+public class SampleTestClass {
+
+    int a = 10;
+    int b = 10;
+
+    @BeforeClass
+    public static void beforeClass() {
+        System.out.println("Static -- Before Class");
+    }
+
+    @AfterClass
+    public static void afterClass() {
+        System.out.println("Static -- After Class");
+    }
+
+    @Before
+    public void setUp() {
+        System.out.println("Before");
+    }
+
+    @Test
+    public void addTest() {
+        int result = new Calculator().add(a, b);
+        assertTrue("Passed", result == 20);
+    }
+
+    @After
+    public void tearDown() {
+        System.out.println("After");
+    }
+}

junit-demo/src/test/java/com/calculator/TestResultClass.java

+package com.calculator;
+
+import junit.framework.TestResult;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class TestResultClass  extends TestResult {
+
+    @Test
+    public void addTest() {
+        int result = new Calculator().add(10, 10);
+        System.out.println(result);
+        Assert.assertEquals("Failed", 20, result);
+    }
+}

junit-demo/src/test/java/com/calculator/TestRunner.java

+package com.calculator;
+
+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(SampleTestClass.class);
+        for (Failure failure : result.getFailures()) {
+            System.out.println(failure.toString());
+        }
+        System.out.println("Failed Test Count: " + result.getFailureCount());
+    }
+}