[MNG-6847] Use diamond operator

maven-surefire-common/src/test/java/org/apache/maven/plugin/surefire/AbstractSurefireMojoTest.java

@@ -131,7 +131,7 @@ public class AbstractSurefireMojoTest {
     public void setupMojo() {
         Artifact mojoArtifact = mojo.getMojoArtifact();
 
-        mojo.setPluginArtifactMap(new LinkedHashMap<String, Artifact>());
+        mojo.setPluginArtifactMap(new LinkedHashMap<>());
         mojo.getPluginArtifactMap().put(mojoArtifact.getGroupId() + ":" + mojoArtifact.getArtifactId(), mojoArtifact);
         Artifact forkedBooter = new DefaultArtifact(
                 "org.apache.maven.surefire",
@@ -143,7 +143,7 @@ public void setupMojo() {
                 mock(ArtifactHandler.class));
         mojo.getPluginArtifactMap().put("org.apache.maven.surefire:surefire-booter", forkedBooter);
 
-        mojo.setProjectArtifactMap(new LinkedHashMap<String, Artifact>());
+        mojo.setProjectArtifactMap(new LinkedHashMap<>());
 
         MavenSession session = mock(MavenSession.class);
         mojo.setSession(session);

maven-surefire-common/src/test/java/org/apache/maven/plugin/surefire/util/DependenciesScannerTest.java

@@ -157,9 +157,9 @@ public void testLocateTestClassesFromMultipleArtifactsWithType() throws Exceptio
         List<String> scanDependencies = new ArrayList<>();
         scanDependencies.add("org.surefire.dependency:dependent-artifact3:test-jar");
 
-        List<String> include = new ArrayList<String>();
+        List<String> include = new ArrayList<>();
         include.add("**/*A.java");
-        List<String> exclude = new ArrayList<String>();
+        List<String> exclude = new ArrayList<>();
 
         List<Artifact> artifacts = Arrays.asList(mainArtifact, testArtifact);
 
@@ -223,7 +223,7 @@ public void testLocateTestClassesFromMultipleVersionsOfArtifact() throws Excepti
         assertEquals(1, classNames.size());
         assertEquals("org.test2.ClassA", classNames.getClassName(0));
 
-        Map<String, String> props = new HashMap<String, String>();
+        Map<String, String> props = new HashMap<>();
         classNames.writeTo(props);
         assertEquals(1, props.size());
         assertFalse(props.values().contains("org.test.ClassA"));

maven-surefire-common/src/test/java/org/apache/maven/surefire/report/FileReporterTest.java

@@ -49,7 +49,7 @@ public void testFileNameWithoutSuffix() {
         WrappedReportEntry wrappedReportEntry =
                 new WrappedReportEntry(reportEntry, ReportEntryType.SUCCESS, 12, null, null);
         reporter = new FileReporter(reportDir, null, Charset.defaultCharset(), false, false, false);
-        reporter.testSetCompleted(wrappedReportEntry, createTestSetStats(), new ArrayList<String>());
+        reporter.testSetCompleted(wrappedReportEntry, createTestSetStats(), new ArrayList<>());
 
         File expectedReportFile = new File(reportDir, TEST_NAME + ".txt");
         assertTrue(
@@ -70,7 +70,7 @@ public void testFileNameWithSuffix() {
         WrappedReportEntry wrappedReportEntry =
                 new WrappedReportEntry(reportEntry, ReportEntryType.SUCCESS, 12, null, null);
         reporter = new FileReporter(reportDir, suffixText, Charset.defaultCharset(), false, false, false);
-        reporter.testSetCompleted(wrappedReportEntry, createTestSetStats(), new ArrayList<String>());
+        reporter.testSetCompleted(wrappedReportEntry, createTestSetStats(), new ArrayList<>());
 
         File expectedReportFile = new File(reportDir, TEST_NAME + "-" + suffixText + ".txt");
         assertTrue(

surefire-booter/src/main/java/org/apache/maven/surefire/booter/SurefireReflector.java

@@ -198,7 +198,7 @@ public void setIfDirScannerAware(Object o, DirectoryScannerParameters dirScanner
 
     public void setMainCliOptions(Object o, List<CommandLineOption> options) {
         if (baseProviderFactory.isAssignableFrom(o.getClass())) {
-            List<Enum<?>> newOptions = checkedList(new ArrayList<Enum<?>>(options.size()), commandLineOptionsClass);
+            List<Enum<?>> newOptions = checkedList(new ArrayList<>(options.size()), commandLineOptionsClass);
             Collection<Integer> ordinals = toOrdinals(options);
             for (Enum<?> e : commandLineOptionsClass.getEnumConstants()) {
                 if (ordinals.contains(e.ordinal())) {

surefire-booter/src/test/java/org/apache/maven/surefire/booter/SurefireReflectorTest.java

@@ -158,7 +158,7 @@ public void testProviderProperties() {
         SurefireReflector surefireReflector = getReflector();
         Object foo = getFoo();
 
-        surefireReflector.setProviderProperties(foo, new HashMap<String, String>());
+        surefireReflector.setProviderProperties(foo, new HashMap<>());
         assertTrue(isCalled(foo));
     }
 

surefire-its/src/test/java/org/apache/maven/surefire/its/fixture/OutputValidator.java

@@ -184,7 +184,7 @@ public File getBaseDir() {
 
     public String[] getStringsOrderInLog(String[] strings) throws VerificationException {
         String[] retArr = new String[strings.length];
-        List<String> strList = new ArrayList<String>(Arrays.asList(strings));
+        List<String> strList = new ArrayList<>(Arrays.asList(strings));
         int i = 0;
         for (String line : loadLogLines()) {
             for (int j = 0; j < strList.size(); j++) {

surefire-its/src/test/resources/surefire-1179-testng-parallel-dataprovider/src/test/java/debug/ParallelTest.java

@@ -21,7 +21,7 @@ public class ParallelTest
     @DataProvider( parallel = true, name = "dataProvider" )
     public Iterator<Object[]> dataProvider()
     {
-        List<Object[]> data = new ArrayList<Object[]>();
+        List<Object[]> data = new ArrayList<>();
         for ( int i = 0; i < 5000; i++ )
         {
             data.add( new Object[]{ "ID_" + i } );

surefire-providers/surefire-junit4/src/test/java/org/apache/maven/surefire/junit4/JUnit4ProviderTest.java

@@ -49,7 +49,7 @@ public void testCreateProvider() {
 
     private JUnit4Provider getJUnit4Provider() {
         BaseProviderFactory providerParameters = new BaseProviderFactory(true);
-        providerParameters.setProviderProperties(new HashMap<String, String>());
+        providerParameters.setProviderProperties(new HashMap<>());
         providerParameters.setClassLoaders(getClass().getClassLoader());
         providerParameters.setTestRequest(new TestRequest(null, null, null));
         providerParameters.setRunOrderParameters(new RunOrderParameters("hourly", new File("")));

surefire-providers/surefire-junit47/src/main/java/org/apache/maven/surefire/junitcore/AsynchronousRunner.java

@@ -36,7 +36,7 @@
  */
 @Deprecated
 public class AsynchronousRunner implements RunnerScheduler {
-    private final List<Future<Object>> futures = Collections.synchronizedList(new ArrayList<Future<Object>>());
+    private final List<Future<Object>> futures = Collections.synchronizedList(new ArrayList<>());
 
     private final ExecutorService fService;
 

surefire-providers/surefire-junit47/src/main/java/org/apache/maven/surefire/junitcore/ConfigurableParallelComputer.java

@@ -53,8 +53,7 @@ public class ConfigurableParallelComputer extends Computer {
 
     private final ExecutorService fService;
 
-    private final List<AsynchronousRunner> nonBlockers =
-            Collections.synchronizedList(new ArrayList<AsynchronousRunner>());
+    private final List<AsynchronousRunner> nonBlockers = Collections.synchronizedList(new ArrayList<>());
 
     public ConfigurableParallelComputer() {
         this(true, true, Executors.newCachedThreadPool(DAEMON_THREAD_FACTORY), false);

surefire-providers/surefire-junit47/src/main/java/org/apache/maven/surefire/junitcore/pc/SharedThreadPoolStrategy.java

@@ -35,7 +35,7 @@
  */
 final class SharedThreadPoolStrategy extends AbstractThreadPoolStrategy {
     SharedThreadPoolStrategy(ConsoleLogger logger, ExecutorService threadPool) {
-        super(logger, threadPool, new ConcurrentLinkedQueue<Future<?>>());
+        super(logger, threadPool, new ConcurrentLinkedQueue<>());
     }
 
     @Override