Add observer tests.

Mobile Buy SDK/Mobile Buy SDK Tests/BUYObserverTests.m

+//
+//  BUYObserverTests.m
+//  Mobile Buy SDK
+//
+//  Created by Shopify.
+//  Copyright (c) 2015 Shopify Inc. All rights reserved.
+//
+//  Permission is hereby granted, free of charge, to any person obtaining a copy
+//  of this software and associated documentation files (the "Software"), to deal
+//  in the Software without restriction, including without limitation the rights
+//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+//  copies of the Software, and to permit persons to whom the Software is
+//  furnished to do so, subject to the following conditions:
+//
+//  The above copyright notice and this permission notice shall be included in
+//  all copies or substantial portions of the Software.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+//  THE SOFTWARE.
+//
+
+#import <XCTest/XCTest.h>
+#import "BUYObserver.h"
+
+@interface Target : NSObject
+
+@property (nonatomic) NSString *name;
+@property (nonatomic) NSNumber *number;
+@property (nonatomic) NSDate *date;
+
+@end
+
+@implementation Target
+@end
+
+@interface BUYObserverTests : XCTestCase
+@end
+
+@implementation BUYObserverTests
+
+- (void)test {
+	
+	NSArray *properties = @[@"name", @"number", @"date"];
+	Target *target = [[Target alloc] init];
+	
+	BUYObserver *observer = [BUYObserver observeProperties:properties ofObject:target];
+	XCTAssertEqualObjects(observer.observedProperties, properties);
+	XCTAssertEqualObjects(observer.changedProperties, [NSSet set]);
+	
+	target.name = @"Name";
+	XCTAssertEqualObjects(observer.changedProperties, [NSSet setWithObject:@"name"]);
+	
+	target.number = @10;
+	target.date = [NSDate date];
+	NSSet *expected = [NSSet setWithObjects:@"name", @"number", @"date", nil];
+	XCTAssertEqualObjects(observer.changedProperties, expected);
+	
+	[observer reset];
+	XCTAssertEqualObjects(observer.changedProperties, [NSSet set]);
+
+	__weak Target *weakTarget = target;
+
+	[observer cancel];
+	XCTAssertEqualObjects(observer.changedProperties, nil);
+	XCTAssertEqualObjects(observer.object, nil);
+	target = nil;
+	
+	XCTAssertEqual(weakTarget, nil);
+}
+
+@end

Mobile Buy SDK/Mobile Buy SDK.xcodeproj/project.pbxproj

@@ -87,6 +87,7 @@
 		84980F2A1CB75AC200CFAB58 /* BUYObjectProtocol.h in Headers */ = {isa = PBXBuildFile; fileRef = 84980F281CB75AC200CFAB58 /* BUYObjectProtocol.h */; };
 		84980F2C1CB75B5E00CFAB58 /* BUYModelManagerProtocol.h in Headers */ = {isa = PBXBuildFile; fileRef = 84980F2B1CB75B5E00CFAB58 /* BUYModelManagerProtocol.h */; };
 		84980F2D1CB75B5E00CFAB58 /* BUYModelManagerProtocol.h in Headers */ = {isa = PBXBuildFile; fileRef = 84980F2B1CB75B5E00CFAB58 /* BUYModelManagerProtocol.h */; };
+		8491104A1CCEA85C00E53B93 /* BUYObserverTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 849110461CCEA85C00E53B93 /* BUYObserverTests.m */; };
 		84980F291CB75AC200CFAB58 /* BUYObjectProtocol.h in Headers */ = {isa = PBXBuildFile; fileRef = 84980F281CB75AC200CFAB58 /* BUYObjectProtocol.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		84980F2A1CB75AC200CFAB58 /* BUYObjectProtocol.h in Headers */ = {isa = PBXBuildFile; fileRef = 84980F281CB75AC200CFAB58 /* BUYObjectProtocol.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		84980F2C1CB75B5E00CFAB58 /* BUYModelManagerProtocol.h in Headers */ = {isa = PBXBuildFile; fileRef = 84980F2B1CB75B5E00CFAB58 /* BUYModelManagerProtocol.h */; settings = {ATTRIBUTES = (Public, ); }; };
@@ -465,6 +466,7 @@
 		8491103F1CCE9DFB00E53B93 /* BUYPropertyDescriptionAdditionsTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = BUYPropertyDescriptionAdditionsTests.m; sourceTree = "<group>"; };
 		849110411CCE9E0A00E53B93 /* BUYEntityDescriptionAdditionsTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = BUYEntityDescriptionAdditionsTests.m; sourceTree = "<group>"; };
 		849110431CCE9F3F00E53B93 /* BUYTransformerTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = BUYTransformerTests.m; sourceTree = "<group>"; };
+		849110461CCEA85C00E53B93 /* BUYObserverTests.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = BUYObserverTests.m; sourceTree = "<group>"; };
 		84980F281CB75AC200CFAB58 /* BUYObjectProtocol.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = BUYObjectProtocol.h; sourceTree = "<group>"; };
 		84980F2B1CB75B5E00CFAB58 /* BUYModelManagerProtocol.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = BUYModelManagerProtocol.h; sourceTree = "<group>"; };
 		84980F2E1CB75C2900CFAB58 /* NSEntityDescription+BUYAdditions.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = "NSEntityDescription+BUYAdditions.h"; sourceTree = "<group>"; };
@@ -832,6 +834,7 @@
 				90F592F81B0D5F4C0026B382 /* BUYIntegrationTest.m */,
 				90F592FE1B0D5F4C0026B382 /* BUYLineItemTest.m */,
 				90F592FF1B0D5F4C0026B382 /* BUYObjectTests.m */,
+				849110461CCEA85C00E53B93 /* BUYObserverTests.m */,
 				8491103F1CCE9DFB00E53B93 /* BUYPropertyDescriptionAdditionsTests.m */,
 				8491102F1CCE708900E53B93 /* BUYRegularExpressionAdditionsTests.m */,
 				849110301CCE708900E53B93 /* BUYStringAdditionsTests.m */,
@@ -1525,6 +1528,7 @@
 				849110331CCE708900E53B93 /* BUYStringAdditionsTests.m in Sources */,
 				906CF1B11B8B66AE001F7D5B /* BUYCNPostalAddress.m in Sources */,
 				8491103C1CCE731900E53B93 /* BUYURLAdditionsTests.m in Sources */,
+				8491104A1CCEA85C00E53B93 /* BUYObserverTests.m in Sources */,
 				849110401CCE9DFB00E53B93 /* BUYPropertyDescriptionAdditionsTests.m in Sources */,
 				906CF1AD1B8B5F7D001F7D5B /* BUYNSPersonNameComponents.m in Sources */,
 				BE98DB5C1BB1F4D000C29564 /* OHHTTPStubsResponse+Helpers.m in Sources */,