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/**
* Copyright (C) 2006-2015 phloc systems
* http://www.phloc.com
* office[at]phloc[dot]com
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.phloc.commons.mock;
import static org.junit.Assert.assertNotNull;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import javax.annotation.Nonnegative;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import javax.annotation.concurrent.Immutable;
import com.phloc.commons.ICloneable;
import com.phloc.commons.ValueEnforcer;
import com.phloc.commons.annotations.PresentForCodeCoverage;
import com.phloc.commons.callback.AdapterRunnableToThrowingRunnable;
import com.phloc.commons.callback.IThrowingRunnable;
import com.phloc.commons.concurrent.ManagedExecutorService;
import com.phloc.commons.equals.EqualsUtils;
import com.phloc.commons.io.streamprovider.ByteArrayInputStreamProvider;
import com.phloc.commons.io.streams.NonBlockingByteArrayOutputStream;
import com.phloc.commons.io.streams.StreamUtils;
import com.phloc.commons.lang.GenericReflection;
import com.phloc.commons.lang.StackTraceHelper;
import com.phloc.commons.microdom.IMicroElement;
import com.phloc.commons.microdom.convert.MicroTypeConverter;
import com.phloc.commons.microdom.serialize.MicroWriter;
import com.phloc.commons.string.StringHelper;
import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
/**
* This class contains default test methods to test the correctness of
* implementations of standard methods.
*
* @author Philip Helger
*/
@Immutable
public final class PhlocTestUtils
{
@PresentForCodeCoverage
@SuppressWarnings ("unused")
private static final PhlocTestUtils s_aInstance = new PhlocTestUtils ();
private PhlocTestUtils ()
{}
private static void _assertTrue (@Nonnull final String sMsg, final boolean bTrue)
{
if (!bTrue)
throw new IllegalStateException (sMsg);
}
private static void _assertFalse (@Nonnull final String sMsg, final boolean bTrue)
{
if (bTrue)
throw new IllegalStateException (sMsg);
}
private static void _assertNotNull (@Nonnull final String sMsg, final Object aObj)
{
if (aObj == null)
throw new IllegalStateException (sMsg);
}
private static void _assertEquals (@Nonnull final String sMsg, @Nullable final T aObj1, @Nullable final T aObj2)
{
if (!EqualsUtils.equals (aObj1, aObj2))
throw new IllegalStateException (sMsg + "\nOBJ1: " + aObj1 + "\nOBJ2: " + aObj2);
}
@SuppressFBWarnings ({ "EC_NULL_ARG" })
private static void _testEqualsImplementation (@Nonnull final DATATYPE aObject)// NOPMD
{
_assertNotNull ("Passed object may not be null!", aObject);
_assertTrue ("Passed objects are not equal", aObject.equals (aObject));
_assertFalse ("Object may no be equal to String", aObject.equals ("any string"));
_assertFalse ("Object may no be equal to null", aObject.equals (null));// NOPMD
}
private static void _testEqualsImplementationWithEqualContentObject (@Nonnull final DATATYPE aObject,
@Nonnull final DATATYPE aObject2)// NOPMD
{
_testEqualsImplementation (aObject);
_testEqualsImplementation (aObject2);
_assertFalse ("This test may not be used with the same object!", aObject == aObject2);// NOPMD
_assertTrue ("Passed objects are not identical!", aObject.equals (aObject2));
_assertTrue ("Passed objects are not identical!", aObject2.equals (aObject));
}
private static void _testEqualsImplementationWithDifferentContentObject (@Nonnull final DATATYPE aObject,
@Nonnull final DATATYPE aObject2)// NOPMD
{
_testEqualsImplementation (aObject);
_testEqualsImplementation (aObject2);
_assertFalse ("This test may not be used with the same object!", aObject == aObject2);// NOPMD
_assertFalse ("Passed objects are identical!", aObject.equals (aObject2));
_assertFalse ("Passed objects are identical!", aObject2.equals (aObject));
}
private static void _testHashcodeImplementation (@Nonnull final DATATYPE aObject)// NOPMD
{
_assertNotNull ("Passed object may not be null!", aObject);
_assertTrue ("hashCode() invocations must be consistent", aObject.hashCode () == aObject.hashCode ());
_assertFalse ("hashCode() may not be 0", aObject.hashCode () == 0);
}
private static void _testHashcodeImplementationWithEqualContentObject (@Nonnull final DATATYPE aObject,
@Nonnull final DATATYPE aObject2)// NOPMD
{
_testHashcodeImplementation (aObject);
_testHashcodeImplementation (aObject2);
_assertTrue ("Passed objects are not identical!", aObject.equals (aObject2));
_assertFalse ("This test may not be used with the same object!", aObject == aObject2);// NOPMD
_assertTrue ("hashCode() invocations must be consistent", aObject.hashCode () == aObject2.hashCode ());
_assertTrue ("hashCode() invocations must be consistent", aObject2.hashCode () == aObject.hashCode ());
}
private static void _testHashcodeImplementationWithDifferentContentObject (@Nonnull final DATATYPE aObject1,
@Nonnull final DATATYPE aObject2)// NOPMD
{
_testHashcodeImplementation (aObject1);
_testHashcodeImplementation (aObject2);
_assertFalse ("Passed objects are identical!", aObject1.equals (aObject2));
_assertFalse ("This test may not be used with the same object!", aObject1 == aObject2);// NOPMD
final int nHash1 = aObject1.hashCode ();
final int nHash2 = aObject2.hashCode ();
_assertFalse ("hashCode() may not be the same for both objects", nHash1 == nHash2);
}
/**
* Test the toString implementation of the passed object. It may not be empty,
* and consistent.
*
* @param
* data type
* @param aObject
* The object to be tested.
*/
public static void testToStringImplementation (@Nonnull final DATATYPE aObject)// NOPMD
{
_assertNotNull ("Passed object may not be null!", aObject);
_assertNotNull ("toString() may not return null!", aObject.toString ());
_assertTrue ("toString() may not return an empty string!", aObject.toString ().length () > 0);
_assertTrue ("toString() invocations must be consistent", aObject.toString ().equals (aObject.toString ()));
}
private static void _testToStringImplementationWithEqualContentObject (@Nonnull final DATATYPE aObject,
@Nonnull final DATATYPE aObject2)// NOPMD
{
testToStringImplementation (aObject);
testToStringImplementation (aObject2);
_assertTrue ("Passed objects are not identical!", aObject.equals (aObject2));
_assertFalse ("This test may not be used with the same object!", aObject == aObject2);// NOPMD
}
private static void _testToStringImplementationWithDifferentContentObject (@Nonnull final DATATYPE aObject,
@Nonnull final DATATYPE aObject2)// NOPMD
{
testToStringImplementation (aObject);
testToStringImplementation (aObject2);
_assertFalse ("Passed objects are identical!", aObject.equals (aObject2));
_assertFalse ("This test may not be used with the same object!", aObject == aObject2);// NOPMD
}
/**
* Check if two different objects (who may not be the same) are equal to each
* other. Checks toString, equals and hashCode.
*
* @param
* data type
* @param aObject1
* First object. May not be null.
* @param aObject2
* Second object. May not be null.
*/
public static void testDefaultImplementationWithEqualContentObject (@Nonnull final DATATYPE aObject1,
@Nonnull final DATATYPE aObject2)// NOPMD
{
_testEqualsImplementationWithEqualContentObject (aObject1, aObject2);
_testHashcodeImplementationWithEqualContentObject (aObject1, aObject2);
_testToStringImplementationWithEqualContentObject (aObject1, aObject2);
}
/**
* Check if two different objects are different to each other. Checks
* toString, equals and hashCode.
*
* @param
* data type
* @param aObject1
* First object. May not be null.
* @param aObject2
* Second object. May not be null.
*/
public static void testDefaultImplementationWithDifferentContentObject (@Nonnull final DATATYPE aObject1,
@Nonnull final DATATYPE aObject2)// NOPMD
{
_testEqualsImplementationWithDifferentContentObject (aObject1, aObject2);
_testHashcodeImplementationWithDifferentContentObject (aObject1, aObject2);
_testToStringImplementationWithDifferentContentObject (aObject1, aObject2);
}
/**
* Test the serializability of objects. First writes the object to a byte
* array stream, and then tries to rebuild it from there. After reading it
* performs an equals check using
* {@link #testDefaultImplementationWithEqualContentObject(Object, Object)}
*
* @param
* The type of object to be serialized.
* @param aSerializable
* The object to be written and read
* @return The newly read object
*/
@Nonnull
public static DATATYPE testDefaultSerialization (@Nonnull final DATATYPE aSerializable)
{
try
{
// Serialize to byte array
final NonBlockingByteArrayOutputStream aBAOS = new NonBlockingByteArrayOutputStream ();
final ObjectOutputStream aOOS = new ObjectOutputStream (aBAOS);
try
{
aOOS.writeObject (aSerializable);
}
finally
{
StreamUtils.close (aOOS);
}
// Read new object from byte array
DATATYPE aReadObject;
final ObjectInputStream aOIS = new ObjectInputStream (new ByteArrayInputStreamProvider (aBAOS.toByteArray ()).getInputStream ());
try
{
aReadObject = GenericReflection. uncheckedCast (aOIS.readObject ());
}
finally
{
StreamUtils.close (aOIS);
}
// Now check them for equality
testDefaultImplementationWithEqualContentObject (aSerializable, aReadObject);
return aReadObject;
}
catch (final Throwable t)
{
throw new IllegalStateException ("testDefaultSerialization failed", t);
}
}
/**
* Test if the implementation {@link ICloneable} is OK. It creates a clone and
* than uses
* {@link #testDefaultImplementationWithEqualContentObject(Object, Object)} to
* check for equality.
*
* @param aCloneable
* The cloneable object to test
*/
public static void testGetClone (@Nonnull final ICloneable aCloneable)
{
final Object aClone = aCloneable.getClone ();
_assertNotNull ("Clone returned a null object", aClone);
_assertTrue ("Clone returned a different class than the original one",
aClone.getClass ().equals (aCloneable.getClass ()));
testDefaultImplementationWithEqualContentObject (aCloneable, aClone);
}
/**
* Test if the {@link MicroTypeConverter} is OK. It converts it to XML and
* back and than uses
* {@link #testDefaultImplementationWithEqualContentObject(Object, Object)} to
* check for equality.
*
* @param aObj
* The object to test
*/
public static void testMicroTypeConversion (@Nonnull final Object aObj)
{
assertNotNull (aObj);
// Write to XML
final IMicroElement e = MicroTypeConverter.convertToMicroElement (aObj, "test");
assertNotNull (e);
// Read from XML
final Object aObj2 = MicroTypeConverter.convertToNative (e, aObj.getClass ());
assertNotNull (aObj2);
// Write to XML again
final IMicroElement e2 = MicroTypeConverter.convertToMicroElement (aObj2, "test");
assertNotNull (e2);
// Ensure XML representation is identical
final String sXML1 = MicroWriter.getXMLString (e);
final String sXML2 = MicroWriter.getXMLString (e2);
_assertEquals ("XML representation must be identical", sXML1, sXML2);
// Ensure they are equals
testDefaultImplementationWithEqualContentObject (aObj, aObj2);
}
/**
* Run something in parallel
*
* @param nCalls
* The number of invocations of the passed runnable. Must be ≥ 0.
* @param aRunnable
* The runnable to execute. May not be null.
*/
public static void testInParallel (@Nonnegative final int nCalls, @Nonnull final Runnable aRunnable)
{
ValueEnforcer.notNull (aRunnable, "Runnable");
testInParallel (nCalls, new AdapterRunnableToThrowingRunnable (aRunnable));
}
/**
* Run something in parallel
*
* @param nCalls
* The number of invocations of the passed runnable. Must be ≥ 0.
* @param aRunnable
* The runnable to execute. May not be null.
*/
public static void testInParallel (@Nonnegative final int nCalls, @Nonnull final IThrowingRunnable aRunnable)
{
ValueEnforcer.isGE0 (nCalls, "Calls");
ValueEnforcer.notNull (aRunnable, "Runnable");
// More than 20s thread would be overkill!
final ExecutorService aES = Executors.newFixedThreadPool (20);
final List aErrors = new ArrayList ();
for (int i = 0; i < nCalls; ++i)
{
aES.submit (new Runnable ()
{
@Override
public void run ()
{
try
{
aRunnable.run ();
}
catch (final Throwable t)
{
// Remember thread stack
aErrors.add (t.getMessage () + "\n" + StackTraceHelper.getStackAsString (t));
}
}
});
}
ManagedExecutorService.shutdownAndWaitUntilAllTasksAreFinished (aES);
// No errors should have occurred
if (!aErrors.isEmpty ())
throw new IllegalStateException (StringHelper.getImploded (aErrors));
}
}
