Bump errorprone to 2.2.0

build.gradle

@@ -10,7 +10,7 @@ buildscript {
         classpath 'org.kordamp:markdown-gradle-plugin:1.0.0'
 		classpath 'org.kordamp.gradle:clirr-gradle-plugin:0.2.2'
 		classpath "org.kt3k.gradle.plugin:coveralls-gradle-plugin:2.3.1"
-		classpath 'net.ltgt.gradle:gradle-errorprone-plugin:0.0.10'
+		classpath 'net.ltgt.gradle:gradle-errorprone-plugin:0.0.13'
     }
 }
 
@@ -160,7 +160,15 @@ allprojects {
 			'-Xlint:-path',
 			// Disable errorprone checks
 			'-Xep:TypeParameterUnusedInFormals:OFF',
-			'-Xep:TopLevel:OFF',
+			// Disable errorpone StringSplitter check, as it
+			// recommends using Splitter from Guava, which we don't
+			// have (nor want to use in Smack).
+			'-Xep:StringSplitter:OFF',
+			'-Xep:JdkObsolete:OFF',
+			// Disabled because sinttest re-uses BeforeClass from junit.
+			// TODO: change sinttest so that it has it's own
+			// BeforeClass and re-enable this check.
+			'-Xep:JUnit4ClassAnnotationNonStatic:OFF',
 		]
 	}
 
@@ -191,11 +199,8 @@ allprojects {
 		options.encoding = 'UTF-8'
 	}
 
-	// Pin the errorprone version to prevent "unsupported major.minor
+	dependencies {
-	// version 52.0" error messages caused by the errorprone javac.
+		errorprone 'com.google.errorprone:error_prone_core:2.2.0'
-	// See https://github.com/tbroyer/gradle-errorprone-plugin/issues/18 for more information.
-	configurations.errorprone {
-		resolutionStrategy.force 'com.google.errorprone:error_prone_core:2.0.18'
 	}
 
 	// Make all project's 'test' target depend on javadoc, so that

smack-bosh/src/main/java/org/jivesoftware/smack/bosh/XMPPBOSHConnection.java

@@ -88,6 +88,7 @@ public class XMPPBOSHConnection extends AbstractXMPPConnection {
     /**
      * Holds the initial configuration used while creating the connection.
      */
+    @SuppressWarnings("HidingField")
     private final BOSHConfiguration config;
 
     // Some flags which provides some info about the current state.

smack-core/src/test/java/org/jivesoftware/smack/SmackConfigurationTest.java

@@ -18,20 +18,18 @@ package org.jivesoftware.smack;
 
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
-import static org.junit.Assert.fail;
 
 import org.junit.Ignore;
 import org.junit.Test;
 
 public class SmackConfigurationTest {
 
+    /**
+     * Test is Smack is able to initialize itself without throwing a Throwable.
+     */
     @Test
     public void testSmackConfiguration() {
-        try {
         SmackConfiguration.getDefaultReplyTimeout();
-        } catch (Throwable t) {
-            fail("SmackConfiguration threw Throwable");
-        }
     }
 
     // As there is currently no annotation/way to run a testclass/single test in a separate VM,

smack-extensions/src/main/java/org/jivesoftware/smackx/filetransfer/FileTransfer.java

@@ -312,6 +312,7 @@ public abstract class FileTransfer {
         return amountWritten;
     }
 
+    @SuppressWarnings("JavaLangClash")
     public enum Error {
         /**
          * No error.

smack-extensions/src/test/java/org/jivesoftware/smackx/bytestreams/ibb/InBandBytestreamManagerTest.java

@@ -160,7 +160,7 @@ public class InBandBytestreamManagerTest extends InitExtensions {
     }
 
     @Test
-    public void shouldUseConfiguredStanzaType() throws SmackException, InterruptedException {
+    public void shouldUseConfiguredStanzaType() throws SmackException, InterruptedException, XMPPException {
         InBandBytestreamManager byteStreamManager = InBandBytestreamManager.getByteStreamManager(connection);
         byteStreamManager.setStanza(StanzaType.MESSAGE);
 
@@ -173,14 +173,10 @@ public class InBandBytestreamManagerTest extends InitExtensions {
 
         });
 
-        try {
         // start In-Band Bytestream
         byteStreamManager.establishSession(targetJID);
-        }
-        catch (XMPPException e) {
-            protocol.verifyAll();
-        }
 
+        protocol.verifyAll();
     }
 
     @Test

smack-extensions/src/test/java/org/jivesoftware/smackx/pubsub/ConfigureFormTest.java

@@ -17,6 +17,7 @@
 package org.jivesoftware.smackx.pubsub;
 
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.fail;
 
 import java.io.IOException;
 
@@ -77,6 +78,7 @@ public class ConfigureFormTest extends InitExtensions
         try
         {
             node.getNodeConfiguration();
+            fail();
         }
         catch (XMPPErrorException e)
         {

smack-extensions/src/test/java/org/jivesoftware/smackx/xdatavalidation/DataValidationHelperTest.java

@@ -67,13 +67,8 @@ public class DataValidationHelperTest {
         }
 
         field.setType(FormField.Type.list_multi);
-        try {
         element.checkConsistency(field);
     }
-        catch (ValidationConsistencyException e) {
-            fail("No correct check on consistency");
-        }
-    }
 
 
     @Test

smack-im/src/test/java/org/jivesoftware/smack/chat/ChatConnectionTest.java

@@ -21,7 +21,6 @@ import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;
-import static org.junit.Assert.fail;
 
 import org.jivesoftware.smack.DummyConnection;
 import org.jivesoftware.smack.packet.Message;
@@ -343,7 +342,7 @@ public class ChatConnectionTest {
         try {
             chatServer.join();
         } catch (InterruptedException e) {
-            fail();
+            throw new AssertionError(e);
         }
         waitListener.waitAndReset();
     }

smack-im/src/test/java/org/jivesoftware/smack/roster/RosterTest.java

@@ -683,9 +683,9 @@ public class RosterTest extends InitSmackIm {
                         connection.processStanza(response);
 
                         // Verify the roster update request
-                        assertSame("A roster set MUST contain one and only one <item/> element.",
+                        if (rosterRequest.getRosterItemCount() != 1) {
-                                1,
+                            throw new AssertionError("A roster set MUST contain one and only one <item/> element.");
-                                rosterRequest.getRosterItemCount());
+                        }
                         verifyUpdateRequest(rosterRequest);
                         break;
                     }

smack-im/src/test/java/org/jivesoftware/smack/roster/SubscriptionPreApprovalTest.java

@@ -180,9 +180,9 @@ public class SubscriptionPreApprovalTest extends InitSmackIm {
                         connection.processStanza(response);
 
                         // Verify the roster update request
-                        assertSame("A roster set MUST contain one and only one <item/> element.",
+                        if (rosterRequest.getRosterItemCount() != 1) {
-                                1,
+                            throw new AssertionError("A roster set MUST contain one and only one <item/> element.");
-                                rosterRequest.getRosterItemCount());
+                        }
                         verifyRosterUpdateRequest(rosterRequest);
                         break;
                     }

smack-integration-test/src/main/java/org/jivesoftware/smackx/omemo/OmemoKeyTransportTest.java

@@ -23,7 +23,6 @@ import static org.jivesoftware.smackx.omemo.OmemoIntegrationTestHelper.unidirect
 import static org.junit.Assert.assertTrue;
 
 import java.util.Arrays;
-import java.util.concurrent.TimeoutException;
 import java.util.logging.Level;
 
 import org.jivesoftware.smack.SmackException;
@@ -37,7 +36,6 @@ import org.jivesoftware.smackx.omemo.internal.OmemoMessageInformation;
 import org.jivesoftware.smackx.omemo.listener.OmemoMessageListener;
 import org.jivesoftware.smackx.omemo.util.OmemoMessageBuilder;
 
-import junit.framework.TestCase;
 import org.igniterealtime.smack.inttest.SmackIntegrationTest;
 import org.igniterealtime.smack.inttest.SmackIntegrationTestEnvironment;
 import org.igniterealtime.smack.inttest.TestNotPossibleException;
@@ -97,11 +95,8 @@ public class OmemoKeyTransportTest extends AbstractOmemoIntegrationTest {
         ChatManager.getInstanceFor(alice.getConnection()).chatWith(bob.getOwnJid().asEntityBareJidIfPossible())
                 .send(message);
 
-        try {
+        // TODO: Should use 'timeout' field instead of hardcoded '10 * 1000'.
         syncPoint.waitForResult(10 * 1000);
-        } catch (TimeoutException e) {
-            TestCase.fail("We MUST have received the keyTransportMessage within 10 seconds.");
-        }
     }
 
     @Override

smack-legacy/src/main/java/org/jivesoftware/smackx/workgroup/packet/AgentStatus.java

@@ -39,7 +39,7 @@ import org.xmlpull.v1.XmlPullParserException;
  */
 public class AgentStatus implements ExtensionElement {
 
-    @SuppressWarnings("SimpleDateFormatConstant")
+    @SuppressWarnings("DateFormatConstant")
     private static final SimpleDateFormat UTC_FORMAT = new SimpleDateFormat("yyyyMMdd'T'HH:mm:ss");
 
     static {

smack-legacy/src/main/java/org/jivesoftware/smackx/workgroup/packet/OccupantsInfo.java

@@ -41,7 +41,7 @@ import org.xmlpull.v1.XmlPullParserException;
  */
 public class OccupantsInfo extends IQ {
 
-    @SuppressWarnings("SimpleDateFormatConstant")
+    @SuppressWarnings("DateFormatConstant")
     private static final SimpleDateFormat UTC_FORMAT = new SimpleDateFormat("yyyyMMdd'T'HH:mm:ss");
 
     static {

smack-legacy/src/main/java/org/jivesoftware/smackx/workgroup/packet/Transcripts.java

@@ -37,7 +37,7 @@ import org.jxmpp.jid.Jid;
  */
 public class Transcripts extends IQ {
 
-    @SuppressWarnings("SimpleDateFormatConstant")
+    @SuppressWarnings("DateFormatConstant")
     private static final SimpleDateFormat UTC_FORMAT = new SimpleDateFormat("yyyyMMdd'T'HH:mm:ss");
     static {
         UTC_FORMAT.setTimeZone(TimeZone.getTimeZone("GMT+0"));

smack-legacy/src/main/java/org/jivesoftware/smackx/workgroup/packet/TranscriptsProvider.java

@@ -39,7 +39,7 @@ import org.xmlpull.v1.XmlPullParserException;
  */
 public class TranscriptsProvider extends IQProvider<Transcripts> {
 
-    @SuppressWarnings("SimpleDateFormatConstant")
+    @SuppressWarnings("DateFormatConstant")
     private static final SimpleDateFormat UTC_FORMAT = new SimpleDateFormat("yyyyMMdd'T'HH:mm:ss");
     static {
         UTC_FORMAT.setTimeZone(TimeZone.getTimeZone("GMT+0"));

smack-omemo-signal/src/test/java/org/jivesoftware/smack/omemo/SignalOmemoKeyUtilTest.java

@@ -24,7 +24,6 @@ import static junit.framework.TestCase.assertEquals;
 import static junit.framework.TestCase.assertNotNull;
 import static junit.framework.TestCase.assertNotSame;
 import static junit.framework.TestCase.assertTrue;
-import static junit.framework.TestCase.fail;
 
 import java.util.HashMap;
 import java.util.Iterator;
@@ -66,32 +65,24 @@ public class SignalOmemoKeyUtilTest extends SmackTestSuite {
     }
 
     @Test
-    public void omemoIdentityKeyPairSerializationTest() {
+    public void omemoIdentityKeyPairSerializationTest() throws CorruptedOmemoKeyException {
         IdentityKeyPair ikp = keyUtil.generateOmemoIdentityKeyPair();
         byte[] bytes = keyUtil.identityKeyPairToBytes(ikp);
         assertNotNull("serialized identityKeyPair must not be null.",
                 bytes);
         assertNotSame("serialized identityKeyPair must not be of length 0.",
                 0, bytes.length);
-        try {
+
         IdentityKeyPair ikp2 = keyUtil.identityKeyPairFromBytes(bytes);
         assertTrue("Deserialized IdentityKeyPairs PublicKey must equal the originals one.",
                     ikp.getPublicKey().equals(ikp2.getPublicKey()));
-        } catch (CorruptedOmemoKeyException e) {
-            fail("Caught exception while deserializing IdentityKeyPair.");
-        }
     }
 
     @Test
-    public void omemoIdentityKeySerializationTest() {
+    public void omemoIdentityKeySerializationTest() throws CorruptedOmemoKeyException {
         IdentityKey k = keyUtil.generateOmemoIdentityKeyPair().getPublicKey();
-
+        assertEquals("Deserialized IdentityKey must equal the original one.", k,
-        try {
+                keyUtil.identityKeyFromBytes(keyUtil.identityKeyToBytes(k)));
-            assertEquals("Deserialized IdentityKey must equal the original one.",
-                    k, keyUtil.identityKeyFromBytes(keyUtil.identityKeyToBytes(k)));
-        } catch (CorruptedOmemoKeyException e) {
-            fail("Caught exception while serializing and deserializing identityKey (" + e + "): " + e.getMessage());
-        }
     }
 
     @Test
@@ -103,16 +94,12 @@ public class SignalOmemoKeyUtilTest extends SmackTestSuite {
     }
 
     @Test
-    public void generateOmemoSignedPreKeyTest() {
+    public void generateOmemoSignedPreKeyTest() throws CorruptedOmemoKeyException {
         IdentityKeyPair ikp = keyUtil.generateOmemoIdentityKeyPair();
-        try {
         SignedPreKeyRecord spk = keyUtil.generateOmemoSignedPreKey(ikp, 1);
         assertNotNull("SignedPreKey must not be null.", spk);
         assertEquals("SignedPreKeyId must match.", 1, spk.getId());
         assertEquals("singedPreKeyId must match here also.", 1, keyUtil.signedPreKeyIdFromKey(spk));
-        } catch (CorruptedOmemoKeyException e) {
-            fail("Caught an exception while generating signedPreKey (" + e + "): " + e.getMessage());
-        }
     }
 
     @Test
@@ -124,25 +111,17 @@ public class SignalOmemoKeyUtilTest extends SmackTestSuite {
     }
 
     @Test
-    public void addressToDeviceTest() {
+    public void addressToDeviceTest() throws XmppStringprepException {
         SignalProtocolAddress address = new SignalProtocolAddress("test@server.tld", 1337);
-        try {
         OmemoDevice device = keyUtil.addressAsOmemoDevice(address);
         assertEquals(device, new OmemoDevice(JidCreate.bareFrom("test@server.tld"), 1337));
-        } catch (XmppStringprepException e) {
-            fail("Could not convert address to device: " + e + " " + e.getMessage());
-        }
     }
 
     @Test
-    public void deviceToAddressTest() {
+    public void deviceToAddressTest() throws XmppStringprepException {
-        try {
         OmemoDevice device = new OmemoDevice(JidCreate.bareFrom("test@server.tld"), 1337);
         SignalProtocolAddress address = keyUtil.omemoDeviceAsAddress(device);
         assertEquals(address, new SignalProtocolAddress("test@server.tld", 1337));
-        } catch (XmppStringprepException e) {
-            fail("Could not convert device to address: " + e + " " + e.getMessage());
-        }
     }
 
     @Test

smack-tcp/src/main/java/org/jivesoftware/smack/tcp/XMPPTCPConnection.java

@@ -293,6 +293,7 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
      */
     private final Set<StanzaFilter> requestAckPredicates = new LinkedHashSet<>();
 
+    @SuppressWarnings("HidingField")
     private final XMPPTCPConnectionConfiguration config;
 
     /**