How to use OCMock to mock a service - ios

Question

I am trying to write a unit test for creating a checklistItem, with properties defined below:
typedef NS_ENUM (NSUInteger, ChecklistStatus) { Pending, Completed };
#protocol IChecklistItem <NSObject>
#property (nonatomic, assign, readonly) NSInteger Id;
#property (nonatomic, copy, readonly) NSString *Description;
#property (nonatomic, assign, readonly)BOOL IsCompleted;
#property (nonatomic, assign, readwrite) ChecklistStatus Status;
#property (nonatomic, strong, readwrite) NSDate *CompletedDate;
#property (nonatomic, copy, readwrite) NSString *CompletedByUserId;
#property (nonatomic, assign, readonly) NSInteger RoleId;
#property (nonatomic, assign, readonly) NSInteger GroupId;
#property (nonatomic, strong, readonly) NSArray<IChecklistNote> *Notes;
Right now I have this setup in my setup method in my XCTest:
_service = [[ChecklistService alloc]initWithUrl:[NSURL URLWithString:kcChecklistUrl] credentialsManager:self.credentialsManager];
And this is the rest of my Unit Test:
- (void)testCreateChecklistItem {
XCTAssertNotNil(_service);
CCChecklistItem *checklistItem = [CCChecklistItem new];
CCChecklistItem *newChecklistItem = [CCChecklistItem new];
newChecklistItem.Id = 2;
newChecklistItem.Description = #"This is the Description";
newChecklistItem.RoleId = 2;
newChecklistItem.GroupId = 3;
newChecklistItem.Notes = nil;
newChecklistItem.Status = Completed;
XCTestExpectation *checklistItemExpectation = [self expectationWithDescription:#"checklistItem"];
id delegate = OCMProtocolMock(#protocol(ChecklistServiceDelegate));
id mock = [OCMockObject mockForProtocol:(#protocol(IChecklistService))];
[[[mock stub] andReturn:newChecklistItem] createChecklistItem:checklistItem delegate:delegate];
OCMExpect(([delegate didCompleteCreateChecklistItem:[OCMArg checkWithBlock:^BOOL(id obj) {
CCChecklistItem *items = obj;
XCTAssertNotNil(items);
double checklistId = items.Id;
XCTAssert(checklistId != 0);
[checklistItemExpectation fulfill];
}]]));
[_service createChecklistItem:checklistItem delegate:delegate];
[self waitForExpectationsWithTimeout:5 handler:^(NSError *error) {
if(error) {
}
OCMVerifyAll(delegate);
}];
}
However, i get the error failed: caught "NSUnknownKeyException", "[<__NSCFString 0x7faeaad6bd60> valueForUndefinedKey:]: this class is not key value coding-compliant for the key CompletedBy."
The createChecklistItem is defined below:
- (void)createChecklistItem:(id<IChecklistItem>)checklistItem delegate:(NSObject<ChecklistServiceDelegate> *)delegate
{
NSMutableArray *mockChecklistItem = [NSMutableArray new];
[TestObjectLoader loadObject:mockChecklistItem
fromJSONFile:#"ChecklistItem"
withMapping:[MappingProvider checklistCreateMapping]];
if (delegate != nil && [delegate respondsToSelector:#selector (didCompleteCreateChecklistItem:)]) {
[delegate didCompleteCreateChecklistItem:(NSObject<IChecklistItem> *)mockChecklistItem];
}
}
Where Checklist.json is
{
"Id": 13,
"Desc": "Checklist Description",
"IsCompleted": "false",
"TypeId": 1,
"RoleId": 1,
"Status": "C",
"CompletedDateTime": "2015-06-23T00:00:00+00:00",
"CompletedBy": "AC",
"Notes": [
{
"Note": "test",
"CreatedBy": "AC",
"CreatedDateTime": "2015-06-23T00:00:00+00:00"
}
]
}
Basically, I want to mock the service and when createChecklistItem is called, I simply just want to set a random Id on the object and pass it back instead of reading it through the ChecklistService from the Json file. IS there anyway to do this? I incorporated the mock in my test but I do not believe i am using it correctly...

Answer 1

You don't actually need Checklist.json, you should just be returning a value with a different Id.
So...
- (void)createChecklistItem:(id<IChecklistItem>)checklistItem delegate:(NSObject<ChecklistServiceDelegate> *)delegate
{
NSMutableArray *mockChecklistItem = [NSMutableArray new];
[TestObjectLoader loadObject:mockChecklistItem
fromJSONFile:#"ChecklistItem"
withMapping:[MappingProvider checklistCreateMapping]];
if (delegate != nil && [delegate respondsToSelector:#selector (didCompleteCreateChecklistItem:)]) {
[delegate didCompleteCreateChecklistItem:(NSObject<IChecklistItem> *)mockChecklistItem];
}
}
should simply just be
checklistItem.Id = 2; //Random number