Index: configure.ac
==================================================================
--- configure.ac
+++ configure.ac
@@ -28,11 +28,34 @@
 	#import <objc/objc.h>
 	], [
 	id n = nil;
 	for (id i in n);
 	], [
-	AC_DEFINE(OF_HAVE_FAST_ENUMERATION, 1, [Fast Enumeration support])
+	AC_DEFINE(OF_HAVE_FAST_ENUMERATION, 1,
+		[Compiler support for Fast Enumeration])
+	AC_MSG_RESULT(yes)
+	], [
+	AC_MSG_RESULT(no)])
+
+AC_MSG_CHECKING(whether Objective C compiler supports properties)
+AC_TRY_COMPILE([
+	#import <objc/objc.h>
+
+	@interface Foo
+	{
+		id bar;
+	}
+
+	@property (retain, nonatomic) id bar;
+	@end
+	], [
+	Foo *foo = nil;
+	[foo setBar: nil];
+	[foo bar];
+	], [
+	AC_DEFINE(OF_HAVE_PROPERTIES, 1, [Compiler support for properties])
+	AC_SUBST(PROPERTIES_M, "properties.m")
 	AC_MSG_RESULT(yes)
 	], [
 	AC_MSG_RESULT(no)])
 
 AC_MSG_CHECKING(which Objective C runtime we use)

Index: extra.mk.in
==================================================================
--- extra.mk.in
+++ extra.mk.in
@@ -1,9 +1,10 @@
 ASPRINTF_M = @ASPRINTF_M@
 OBJC_PROPERTIES_M = @OBJC_PROPERTIES_M@
 OBJC_SYNC_M = @OBJC_SYNC_M@
 OFPLUGIN_M = @OFPLUGIN_M@
 OFTHREAD_M = @OFTHREAD_M@
+PROPERTIES_M = @PROPERTIES_M@
 TESTPLUGIN = @TESTPLUGIN@
 TESTS = @TESTS@
 TEST_LAUNCHER = @TEST_LAUNCHER@
 THREADING_H = @THREADING_H@

Index: tests/Makefile
==================================================================
--- tests/Makefile
+++ tests/Makefile
@@ -13,11 +13,12 @@
        OFString.m	\
        OFTCPSocket.m	\
        ${OFTHREAD_M}	\
        OFXMLElement.m	\
        OFXMLParser.m	\
-       main.m
+       main.m		\
+       ${PROPERTIES_M}
 
 IPHONE_USER = mobile
 IPHONE_TMP = /tmp/objfw-test
 
 .PHONY: run run-tests run-on-iphone

Index: tests/main.m
==================================================================
--- tests/main.m
+++ tests/main.m
@@ -26,10 +26,13 @@
 extern void list_tests();
 extern void object_tests();
 #ifdef OF_PLUGINS
 extern void plugin_tests();
 #endif
+#ifdef OF_HAVE_PROPERTIES
+extern void properties_tests();
+#endif
 extern void string_tests();
 extern void tcpsocket_tests();
 #ifdef OF_THREADS
 extern void thread_tests();
 #endif
@@ -112,9 +115,12 @@
 #endif
 	xmlelement_tests();
 	xmlparser_tests();
 #ifdef OF_PLUGINS
 	plugin_tests();
+#endif
+#ifdef OF_HAVE_PROPERTIES
+	properties_tests();
 #endif
 
 	return fails;
 }

ADDED   tests/properties.m
Index: tests/properties.m
==================================================================
--- tests/properties.m
+++ tests/properties.m
@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2008 - 2009
+ *   Jonathan Schleifer <js@webkeks.org>
+ *
+ * All rights reserved.
+ *
+ * This file is part of ObjFW. It may be distributed under the terms of the
+ * Q Public License 1.0, which can be found in the file LICENSE included in
+ * the packaging of this file.
+ */
+
+#include "config.h"
+
+#import "OFString.h"
+#import "OFAutoreleasePool.h"
+
+#import "main.h"
+
+static OFString *module = @"Properties";
+
+@interface PropertiesTest: OFObject
+{
+	OFString *foo;
+	OFString *bar;
+}
+
+@property (copy, nonatomic) OFString *foo;
+@property (retain) OFString *bar;
+@end
+
+@implementation PropertiesTest
+@synthesize foo;
+@synthesize bar;
+
+- (void)dealloc
+{
+	[foo release];
+	[bar release];
+
+	[super dealloc];
+}
+@end
+
+void
+properties_tests()
+{
+	OFAutoreleasePool *pool = [[OFAutoreleasePool alloc] init];
+	PropertiesTest *pt = [[[PropertiesTest alloc] init] autorelease];
+	OFString *t = [OFMutableString stringWithString: @"foo"];
+
+	[pt setFoo: t];
+	TEST(@"copy, nonatomic", [[pt foo] isEqual: @"foo"] &&
+	    [pt foo] != @"foo" && [[pt foo] retainCount] == 1)
+
+	[pt setBar: t];
+	TEST(@"retain, atomic", [pt bar] == t && [t retainCount] == 3)
+
+	[pool drain];
+}