testing Parameterized tests in JUnit4

junit-4-basics/.classpath

@@ -26,7 +26,7 @@
 			<attribute name="optional" value="true"/>
 		</attributes>
 	</classpathentry>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER">
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8">
 		<attributes>
 			<attribute name="module" value="true"/>
 			<attribute name="maven.pomderived" value="true"/>

junit-4-basics/.settings/org.eclipse.jdt.core.prefs

@@ -1,8 +1,15 @@
 eclipse.preferences.version=1
-org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.7
-org.eclipse.jdt.core.compiler.compliance=1.7
+org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
+org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
+org.eclipse.jdt.core.compiler.compliance=1.8
+org.eclipse.jdt.core.compiler.debug.lineNumber=generate
+org.eclipse.jdt.core.compiler.debug.localVariable=generate
+org.eclipse.jdt.core.compiler.debug.sourceFile=generate
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
 org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
 org.eclipse.jdt.core.compiler.problem.forbiddenReference=warning
 org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=ignore
 org.eclipse.jdt.core.compiler.release=disabled
-org.eclipse.jdt.core.compiler.source=1.7
+org.eclipse.jdt.core.compiler.source=1.8

junit-4-basics/src/main/java/com/giriharan/StringUtils.java

@@ -0,0 +1,17 @@
+package com.giriharan;
+
+import java.util.stream.IntStream;
+
+public class StringUtils {
+
+	String addString(String s1,String s2)
+	{
+		return s1+s2;
+	}
+
+	int countVowels(String s)
+	{
+		return (int) s.chars().filter(arg -> arg=='a' || arg=='e' || arg=='i' || arg=='o' || arg=='u').count();
+	}
+
+}

junit-4-basics/src/test/java/com/giriharan/StringUtilsParamTest.java

@@ -0,0 +1,45 @@
+package com.giriharan;
+
+import static org.junit.Assert.*;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+import org.junit.runners.Parameterized.Parameters;
+
+@RunWith(Parameterized.class)
+public class StringUtilsParamTest {
+
+	StringUtils su;
+	String s1,s2,expected;
+
+	@Before
+	public void init()
+	{
+		su = new StringUtils();
+	}
+
+	public StringUtilsParamTest(String s1,String s2,String res)
+	{
+		this.s1 = s1;
+		this.s2 = s2;
+		this.expected = res;
+	}
+
+
+	@Parameters
+	public static Object[] testAddValues() {
+		return new Object[] {
+			new Object[] {"Hello","World","HelloWorld"},
+			new Object[] {"","world" ,"world"},
+			new Object[] {"hello","","hello"}
+		};
+	}
+
+	@Test
+	public void testAdd() {
+		assertEquals(expected,su.addString(s1, s2));
+	}
+
+}