Index: tests/Makefile
==================================================================
--- tests/Makefile
+++ tests/Makefile
@@ -50,11 +50,12 @@
 	     OFSHA224HashTests.m	\
 	     OFSHA256HashTests.m	\
 	     OFSHA384HashTests.m	\
 	     OFSHA512HashTests.m
 SRCS_PLUGINS = OFPluginTests.m
-SRCS_SOCKETS = OFHTTPCookieTests.m		\
+SRCS_SOCKETS = OFDNSResolverTests.m		\
+	       OFHTTPCookieTests.m		\
 	       OFHTTPCookieManagerTests.m	\
 	       ${OFHTTPCLIENTTESTS_M}		\
 	       OFKernelEventObserverTests.m	\
 	       OFTCPSocketTests.m		\
 	       OFUDPSocketTests.m		\

ADDED   tests/OFDNSResolverTests.m
Index: tests/OFDNSResolverTests.m
==================================================================
--- tests/OFDNSResolverTests.m
+++ tests/OFDNSResolverTests.m
@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017,
+ *               2018
+ *   Jonathan Schleifer <js@heap.zone>
+ *
+ * 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.QPL included in
+ * the packaging of this file.
+ *
+ * Alternatively, it may be distributed under the terms of the GNU General
+ * Public License, either version 2 or 3, which can be found in the file
+ * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
+ * file.
+ */
+
+#include "config.h"
+
+#import "OFDNSResolver.h"
+#import "OFArray.h"
+#import "OFDictionary.h"
+#import "OFString.h"
+#import "OFAutoreleasePool.h"
+
+#import "TestsAppDelegate.h"
+
+static OFString *module = @"OFDNSResolverTests";
+
+@implementation TestsAppDelegate (OFDNSResolverTests)
+- (void)DNSResolverTests
+{
+	OFAutoreleasePool *pool = [[OFAutoreleasePool alloc] init];
+	OFDNSResolver *resolver = [OFDNSResolver resolver];
+	OFMutableString *staticHosts = [OFMutableString string];
+
+	for (OFString *host in [resolver staticHosts]) {
+		OFString *IPs;
+
+		if ([staticHosts length] > 0)
+			[staticHosts appendString: @"; "];
+
+		IPs = [[[resolver staticHosts] objectForKey: host]
+		    componentsJoinedByString: @", "];
+
+		[staticHosts appendFormat: @"%@=(%@)", host, IPs];
+	}
+	PRINT(GREEN, @"Static hosts: %@", staticHosts);
+
+	PRINT(GREEN, @"Name servers: %@",
+	    [[resolver nameServers] componentsJoinedByString: @", "]);
+
+	PRINT(GREEN, @"Local domain: %@", [resolver localDomain]);
+
+	PRINT(GREEN, @"Search domains: %@",
+	    [[resolver searchDomains] componentsJoinedByString: @", "]);
+
+	PRINT(GREEN, @"Timeout: %lf", [resolver timeout]);
+
+	PRINT(GREEN, @"Max attempts: %u", [resolver maxAttempts]);
+
+	PRINT(GREEN, @"Min number of dots in absolute name: %u",
+	    [resolver minNumberOfDotsInAbsoluteName]);
+
+	PRINT(GREEN, @"Uses TCP: %u", [resolver usesTCP]);
+
+	PRINT(GREEN, @"Config reload interval: %lf",
+	    [resolver configReloadInterval]);
+
+	[pool drain];
+}
+@end

Index: tests/TestsAppDelegate.h
==================================================================
--- tests/TestsAppDelegate.h
+++ tests/TestsAppDelegate.h
@@ -96,10 +96,14 @@
 @end
 
 @interface TestsAppDelegate (OFCharacterSetTests)
 - (void)characterSetTests;
 @end
+
+@interface TestsAppDelegate (OFDNSResolverTests)
+- (void)DNSResolverTests;
+@end
 
 @interface TestsAppDelegate (OFDataTests)
 - (void)dataTests;
 @end
 

Index: tests/TestsAppDelegate.m
==================================================================
--- tests/TestsAppDelegate.m
+++ tests/TestsAppDelegate.m
@@ -440,10 +440,13 @@
 	[self propertyListTests];
 #if defined(OF_HAVE_PLUGINS)
 	[self pluginTests];
 #endif
 
+#ifdef OF_HAVE_SOCKETS
+	[self DNSResolverTests];
+#endif
 	[self systemInfoTests];
 	[self localeTests];
 
 #if defined(OF_IOS)
 	[self outputString: [OFString stringWithFormat: @"%d tests failed!",