Updated mapping test API for 0.20

* Reimplemented connection tests to work with `RKConnectionDescription`. Introduced new `RKConnectionTestExpectation` class
* Slimmed down API by removing proxy methods on `RKMappingTest`
* Eliminated `verifiesOnExpect` behavior in favor of using `evaluateExpectation:`
* Ensured compatibility with RKKiwiMatchers

Code/Testing/RKPropertyMappingTestExpectation.m

@@ -0,0 +1,94 @@
+//
+//  RKMappingTestExpectation.m
+//  RestKit
+//
+//  Created by Blake Watters on 2/17/12.
+//  Copyright (c) 2009-2012 RestKit. All rights reserved.
+//
+//  Licensed under the Apache License, Version 2.0 (the "License");
+//  you may not use this file except in compliance with the License.
+//  You may obtain a copy of the License at
+//
+//  http://www.apache.org/licenses/LICENSE-2.0
+//
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS,
+//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//  See the License for the specific language governing permissions and
+//  limitations under the License.
+//
+
+#import "RKPropertyMappingTestExpectation.h"
+#import "RKPropertyMapping.h"
+
+@interface RKPropertyMappingTestExpectation ()
+@property (nonatomic, copy, readwrite) NSString *sourceKeyPath;
+@property (nonatomic, copy, readwrite) NSString *destinationKeyPath;
+@property (nonatomic, strong, readwrite) id value;
+@property (nonatomic, copy, readwrite) RKMappingTestExpectationEvaluationBlock evaluationBlock;
+@property (nonatomic, strong, readwrite) RKMapping *mapping;
+@end
+
+@implementation RKPropertyMappingTestExpectation
+
++ (RKPropertyMappingTestExpectation *)expectationWithSourceKeyPath:(NSString *)sourceKeyPath destinationKeyPath:(NSString *)destinationKeyPath
+{
+    RKPropertyMappingTestExpectation *expectation = [self new];
+    expectation.sourceKeyPath = sourceKeyPath;
+    expectation.destinationKeyPath = destinationKeyPath;
+
+    return expectation;
+}
+
++ (RKPropertyMappingTestExpectation *)expectationWithSourceKeyPath:(NSString *)sourceKeyPath destinationKeyPath:(NSString *)destinationKeyPath value:(id)value
+{
+    RKPropertyMappingTestExpectation *expectation = [self new];
+    expectation.sourceKeyPath = sourceKeyPath;
+    expectation.destinationKeyPath = destinationKeyPath;
+    expectation.value = value;
+
+    return expectation;
+}
+
++ (RKPropertyMappingTestExpectation *)expectationWithSourceKeyPath:(NSString *)sourceKeyPath destinationKeyPath:(NSString *)destinationKeyPath evaluationBlock:(RKMappingTestExpectationEvaluationBlock)evaluationBlock
+{
+    RKPropertyMappingTestExpectation *expectation = [self new];
+    expectation.sourceKeyPath = sourceKeyPath;
+    expectation.destinationKeyPath = destinationKeyPath;
+    expectation.evaluationBlock = evaluationBlock;
+
+    return expectation;
+}
+
++ (RKPropertyMappingTestExpectation *)expectationWithSourceKeyPath:(NSString *)sourceKeyPath destinationKeyPath:(NSString *)destinationKeyPath mapping:(RKMapping *)mapping
+{
+    RKPropertyMappingTestExpectation *expectation = [self new];
+    expectation.sourceKeyPath = sourceKeyPath;
+    expectation.destinationKeyPath = destinationKeyPath;
+    expectation.mapping = mapping;
+
+    return expectation;
+}
+
+- (NSString *)summary
+{
+    return [NSString stringWithFormat:@"map '%@' to '%@'", self.sourceKeyPath, self.destinationKeyPath];
+}
+
+- (NSString *)description
+{
+    if (self.value) {
+        return [NSString stringWithFormat:@"map '%@' to '%@' with %@ value '%@'",
+                self.sourceKeyPath, self.destinationKeyPath, [self.value class], self.value];
+    } else if (self.evaluationBlock) {
+        return [NSString stringWithFormat:@"map '%@' to '%@' satisfying evaluation block",
+                self.sourceKeyPath, self.destinationKeyPath];
+    } else if (self.mapping) {
+        return [NSString stringWithFormat:@"map '%@' to '%@' using mapping: %@",
+                self.sourceKeyPath, self.destinationKeyPath, self.mapping];
+    }
+
+    return [self summary];
+}
+
+@end