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/*
* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
import java.util.Objects;
import javax.sound.midi.MidiDevice;
import javax.sound.midi.MidiSystem;
import javax.sound.midi.spi.MidiDeviceProvider;
import static java.util.ServiceLoader.load;
/**
* @test
* @bug 8143909
* @author Sergey Bylokhov
*/
public final class ExpectedNPEOnNull {
public static void main(final String[] args) throws Exception {
testMS();
for (final MidiDeviceProvider mdp : load(MidiDeviceProvider.class)) {
testMDP(mdp);
}
testMDP(customMDP);
}
/**
* Tests the part of MidiSystem API, which implemented via
* MidiDeviceProvider.
*/
private static void testMS() throws Exception {
// MidiSystem#getMidiDevice(MidiDevice.Info)
try {
MidiSystem.getMidiDevice(null);
throw new RuntimeException("NPE is expected");
} catch (final NullPointerException ignored) {
}
}
/**
* Tests the MidiDeviceProvider API directly.
*/
private static void testMDP(final MidiDeviceProvider mdp) throws Exception {
// MidiDeviceProvider#isDeviceSupported(Info)
try {
mdp.isDeviceSupported(null);
throw new RuntimeException("NPE is expected");
} catch (final NullPointerException ignored) {
}
// MidiDeviceProvider#getDevice(Info)
try {
mdp.getDevice(null);
throw new RuntimeException("NPE is expected");
} catch (final NullPointerException ignored) {
}
}
/**
* Tests some default implementation of MidiDeviceProvider API, using the
* custom {@code MidiDeviceProvider}, which support nothing.
*/
static MidiDeviceProvider customMDP = new MidiDeviceProvider() {
@Override
public MidiDevice.Info[] getDeviceInfo() {
return new MidiDevice.Info[0];
}
@Override
public MidiDevice getDevice(MidiDevice.Info info) {
Objects.requireNonNull(info);
return null;
}
};
}
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