Update to Java 8 and use some of the new features, update commons-lan…

…g3 and jacoco

build.gradle

@@ -8,7 +8,7 @@ apply plugin: 'jacoco'
 apply plugin: 'maven'
 apply plugin: 'signing'
 
-sourceCompatibility = 1.7
+sourceCompatibility = 1.8
 group = 'org.dstadler'
 archivesBaseName = 'commons-test'
 
@@ -22,7 +22,7 @@ configurations {
 }
 
 dependencies {
-	compile 'org.apache.commons:commons-lang3:3.6'
+	compile 'org.apache.commons:commons-lang3:3.7'
 	compile 'org.dstadler:commons-dost:1.0.0.23'
 
 	// dumbster is somewhat broken, but we use it in SafeCloseSmtpServer...
@@ -59,7 +59,7 @@ test {
 }
 
 jacoco {
-	toolVersion = '0.7.8'
+	toolVersion = '0.7.9'
 }
 
 jacocoTestReport {

src/main/java/org/dstadler/commons/testing/PrivateConstructorCoverage.java

@@ -49,6 +49,6 @@ public static <T> T executePrivateConstructor(final Class<T> targetClass) throws
 		c.setAccessible(true);
 
 		// call it
-		return c.newInstance((Object[]) null);
+		return c.newInstance();
 	}
 }

src/main/java/org/dstadler/commons/testing/TestHelpers.java

@@ -343,11 +343,11 @@ public static void CloneTest(final Cloneable obj) throws Exception {
 
 		// should return the same type of object
 		assertTrue("clone() should return the same type of object (i.e. the same class) in CloneTest!", m	// NOPMD
-				.invoke(obj, new Object[] {}).getClass() == obj.getClass());
+				.invoke(obj).getClass() == obj.getClass());
 
 		// cloned objects should be equal to the original object
 		assertTrue("clone() should return an object that is equal() to the original object in CloneTest!", m
-				.invoke(obj, new Object[] {}).equals(obj));
+				.invoke(obj).equals(obj));
 	}
 
 	/**

src/test/java/org/dstadler/commons/testing/TestHelpersTest.java

@@ -134,12 +134,7 @@ public void testAssertNotContainsMsg() {
 
     @Test
     public void testRunTestWithDifferentLogLevel() {
-        TestHelpers.runTestWithDifferentLogLevel(new Runnable() {
-            @Override
-            public void run() {
-                testAssertNotContains();
-            }
-        }, TestHelpers.class.getName(), Level.WARNING);
+        TestHelpers.runTestWithDifferentLogLevel(this::testAssertNotContains, TestHelpers.class.getName(), Level.WARNING);
     }
 
     @Test

src/test/java/org/dstadler/commons/testing/ThreadTestHelperTest.java

@@ -3,14 +3,11 @@
 import static org.junit.Assert.assertEquals;
 
 import java.util.List;
-import java.util.concurrent.Callable;
 import java.util.concurrent.atomic.AtomicInteger;
 
 import org.junit.Test;
 
-@SuppressWarnings("Convert2Lambda")		// should still compile with Java 7
 public class ThreadTestHelperTest {
-
 	@Test
 	public void testExecuteTestTestRunnable() throws Throwable {
         ThreadTestHelper helper =
@@ -47,23 +44,11 @@ public void testWaitForThreadToFinishSubstring() throws Exception {
 
 	@Test
 	public void testExecuteTestTestCallable() throws Throwable {
-        List<String> list = ThreadTestHelper.executeTest(new Callable<String>() {
-
-			@Override
-			public String call() throws Exception {
-				return "str";
-			}
-		}, 23);
+        List<String> list = ThreadTestHelper.executeTest(() -> "str", 23);
 
         assertEquals(23, list.size());
 
-        list = ThreadTestHelper.executeTest(new Callable<String>() {
-
-			@Override
-			public String call() throws Exception {
-				return "str";
-			}
-		}, 1);
+        list = ThreadTestHelper.executeTest(() -> "str", 1);
 
         assertEquals(1, list.size());
 	}