/*
* Copyright 2007, 2008 Duncan McGregor
*
* This file is part of Rococoa, a library to allow Java to talk to Cocoa.
*
* Rococoa is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Rococoa 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Rococoa. If not, see <http://www.gnu.org/licenses/>.
*/
package org.rococoa.internal;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
import org.junit.Test;
import org.rococoa.Foundation;
import org.rococoa.ID;
import org.rococoa.ObjCObject;
import org.rococoa.Rococoa;
import org.rococoa.cocoa.foundation.NSNumber;
import org.rococoa.cocoa.foundation.NSObject;
import org.rococoa.test.RococoaTestCase;
import com.sun.jna.FromNativeConverter;
import com.sun.jna.NativeLong;
import com.sun.jna.ToNativeConverter;
@SuppressWarnings({ "nls", "unchecked", "cast" })
public class ObjCObjectTypeConverterTest extends RococoaTestCase {
private static Class<? extends Number> primitiveTypeOfID =
(Class<? extends Number>) new ID().nativeType();
@Test public void convertsNSObjectAsArgumentToID() {
ToNativeConverter converter = new ObjCObjectTypeConverter(ObjCObject.class);
// We treat all NSObject's equally in toNative, see RococoaTypeMapper
assertEquals(primitiveTypeOfID, converter.nativeType());
NSObject nsObject = Rococoa.create("NSObject", NSObject.class);
Number nativeValue = (Number) converter.toNative(nsObject, null);
assertEquals(primitiveTypeOfID, nativeValue.getClass());
assertEquals(nsObject.id().longValue(), nativeValue.longValue());
}
@Test public void convertsNullAsArgumentToNull() {
// Not entirely sure about this, maybe 0 would be better than null,
// but JNA seems to interpret it properly
ToNativeConverter converter = new ObjCObjectTypeConverter(ObjCObject.class);
assertEquals(null, converter.toNative(null, null));
}
@Test public void convertsReturnedIDToNSObjectSubclass() {
FromNativeConverter converter = new ObjCObjectTypeConverter(NSNumber.class);
// returning is based on declared type, see RococoaTypeMapper
NSNumber number = Rococoa.create("NSNumber", NSNumber.class, "numberWithInt:", 45);
// We can cope with 64 bits on 64 and 32
Number nativeValue = new Long(number.id().longValue());
NSNumber converted = (NSNumber) converter.fromNative(nativeValue, null);
assertEquals(converted.id(), number.id());
assertEquals(45, converted.intValue());
// We must cope with 32 bits on 32-bit
if (NativeLong.SIZE == 4) {
nativeValue = new Integer(number.id().intValue());
converted = (NSNumber) converter.fromNative(nativeValue, null);
assertEquals(45, converted.intValue());
}
}
@Test public void convertsReturnedNilToNull() {
// Again I'm not sure that this is desirable, but it is what happens.
FromNativeConverter converter = new ObjCObjectTypeConverter(NSNumber.class);
Number nativeValue = new Long(0);
assertNull(converter.fromNative(nativeValue, null));
}
@Test public void returnedNSObjectIsNormallyRetained() {
FromNativeConverter converter = new ObjCObjectTypeConverter(NSNumber.class);
NSNumber number = Rococoa.create("NSNumber", NSNumber.class, "numberWithInt:", 45);
assertRetainCount(2, number); // one for the pool, one for Java
NSNumber converted = (NSNumber) converter.fromNative(new Long(number.id().longValue()), null);
assertRetainCount(3, converted); // now we have another Java alias
assertRetainCount(3, number);
}
@Test public void returnedNSObjectIsNotRetainedIfMethodImpliesWeOwnIt() {
// This is difficult to unit test, as we cannot create FunctionResultContext's.
// Instead we step back look at the results through Foundation.send, which
// routes through the converter.
ID idClass = Foundation.getClass("NSObject");
assertRetainCount(1, Foundation.send(idClass, "alloc", NSObject.class)); // not in the pool, so just one for Java
}
}