XCTEST, un ViewController con una NIB y MKMAPVIEW

Question

Estoy tratando de probar que mi mapa muestra los parámetros de ubicación que le doy. Estoy usando una punta para mi controlador de vista (odio los guiones gráficos).

El problema con el que me he encontrado es que mi mapa es nulo en mi prueba. El mapa se inicializa en la punta y no se inicializa en mi código actual. Intenté inicializar mi punta con mi ViewController, pero eso no parece funcionar en XCTEST.

#import <XCTest/XCTest.h>
#include "HomeVC.h"

@interface homeVCTests : XCTestCase {
    HomeVC* homeVC;
}

@end

@implementation homeVCTests

- (void)setUp
{
    [super setUp];

    homeVC = [[HomeVC alloc] initWithNibName:@"HomeVC" bundle:nil];
    [homeVC viewDidLoad];
}

- (void)tearDown
{
    [super tearDown];
}

- (void)testHomeHasMap // Fails
{
    XCTAssertNotNil(homeVC.map, @"Map is not nil.");
}

- (void)testHomeHasMapTypeHybrid // Fails
{
    XCTAssertEqual(homeVC.map.mapType, MKMapTypeHybrid, @"Map type is hybrid(2)");
}

- (void)testHomeHasMapWithMyLocation // Fails
{
    [homeVC setMapCurrentLocation:37.785834 lon:-122.406417];
    CLLocationCoordinate2D checkpoint = CLLocationCoordinate2DMake(37.785834, -122.406417);
    XCTAssertEqual(homeVC.map.centerCoordinate.latitude, checkpoint.latitude, @"Map shows my location.");
}

@end

Homevc.h

#import <UIKit/UIKit.h>
#import <MapKit/MapKit.h>
#import <CoreLocation/CoreLocation.h>
#import "AppDelegate.h"

@class User;
@class LoginRegisterVC;

@interface HomeVC : UIViewController <CLLocationManagerDelegate, MKMapViewDelegate> {
IBOutlet MKMapView* map;
CLLocationManager* locationManager;
CLLocationCoordinate2D currentLocation;
LoginRegisterVC* loginRegVC;

User* user;

}
@property(nonatomic, strong)LoginRegisterVC* loginRegVC;
@property(nonatomic, strong)User* user;
@property(nonatomic, strong)IBOutlet MKMapView* map;
@property(nonatomic, strong)CLLocationManager* locationManager;
@property(nonatomic)CLLocationCoordinate2D currentLocation;


-(void)setMapCurrentLocation:(float)lat lon:(float)lon;
@end

Homevc.m

#import "HomeVC.h"
#import "User.h"
#import "LoginRegisterVC.h"

#define METERS_PER_MILE 1609.344

@interface HomeVC ()

@end

@implementation HomeVC
@synthesize map, locationManager, loginRegVC, user;
@synthesize currentLocation = _currentLocation;

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}

- (void)viewDidLoad
{
[super viewDidLoad];

//self.map = MKMapView.new;
self.map.mapType = MKMapTypeHybrid;
self.map.delegate = self;

//NSLog(@"%lu", self.map.mapType);

[self startStandardUpdates];

[self setMapCurrentLocation:self.locationManager.location.coordinate.latitude
lon:self.locationManager.location.coordinate.longitude];

}

- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}

-(void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:true];

if (self.user.loggedIn==false) {
self.loginRegVC = LoginRegisterVC.new;
self.loginRegVC.user = self.user;
[self presentViewController:self.loginRegVC animated:true completion:nil];
}
}

- (void)startStandardUpdates
{
if (nil == self.locationManager)
self.locationManager = [[CLLocationManager alloc] init];

self.locationManager.delegate = self;
self.locationManager.desiredAccuracy = kCLLocationAccuracyBest;

self.locationManager.distanceFilter = 5; // meters

[self.locationManager startUpdatingLocation];
}

- (void)locationManager:(CLLocationManager *)manager
didUpdateToLocation:(CLLocation *)newLocation
fromLocation:(CLLocation *)oldLocation
{
NSLog(@"%f, %f", newLocation.coordinate.latitude, newLocation.coordinate.longitude);
[self setMapCurrentLocation:newLocation.coordinate.latitude lon:newLocation.coordinate.longitude];
}

- (void)locationManager:(CLLocationManager *)manager monitoringDidFailForRegion:(CLRegion *)region withError:(NSError *)error
{

}

-(void)setMapCurrentLocation:(float)lat lon:(float)lon
{
self.currentLocation = CLLocationCoordinate2DMake(lat, lon);
MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance(self.currentLocation,
0.5*METERS_PER_MILE,
0.5*METERS_PER_MILE);
[self.map setRegion:region animated:true];
NSLog(@"map center: %f, %f", self.map.centerCoordinate.latitude, self.map.centerCoordinate.longitude);
}
@end

Answer 1

Es imposible realizar pruebas unitarias como esta para controladores de vista que implementan métodos asincrónicos. Sus métodos de prueba se están ejecutando instantáneamente para que no pueda ver los resultados. Puede usar semáforos u otras técnicas para pausar Runloop hasta que los estados cumplan con sus requisitos.