Fix and test coverage for base URLs containing a path

Code/Network/RKURL.m

@@ -28,15 +28,20 @@
 }
 
 - (id)initWithBaseURLString:(NSString*)baseURLString resourcePath:(NSString*)resourcePath queryParams:(NSDictionary*)queryParams {
+    // Ensure the resource path always has a leading slash
+    if ([resourcePath length] > 0) {
+        resourcePath = ([resourcePath characterAtIndex:0] != '/') ? [NSString stringWithFormat:@"/%@", resourcePath] : resourcePath;
+    }
 	NSString* resourcePathWithQueryString = RKPathAppendQueryParams(resourcePath, queryParams);
 	NSURL *baseURL = [NSURL URLWithString:baseURLString];
-	NSURL *completeURL = [NSURL URLWithString:resourcePathWithQueryString relativeToURL:baseURL];
+    NSURL *completeURL = [NSURL URLWithString:[NSString stringWithFormat:@"%@%@", baseURL, resourcePathWithQueryString]];
 	if (!completeURL) {
 		[self release];
 		return nil;
 	}
 	
 	// You can't safely use initWithString:relativeToURL: in a NSURL subclass, see http://www.openradar.me/9729706
+    NSLog(@"Initialized the string: %@", [completeURL absoluteString]);
 	self = [self initWithString:[completeURL absoluteString]];
 	if (self) {
 		_baseURLString = [baseURLString copy];

Specs/Network/RKURLSpec.m

@@ -53,5 +53,10 @@
     assertThat([URL absoluteString], is(equalTo(@"http://restkit.org")));
 }
 
+- (void)itShouldHandleBaseURLsWithAPath {
+    RKURL* URL = [RKURL URLWithBaseURLString:@"http://restkit.org/this" resourcePath:@"/test" queryParams:nil];
+    assertThat([URL absoluteString], is(equalTo(@"http://restkit.org/this/test")));
+}
+
 @end