Testing a UIViewController with OCHamcrest and OCMock

LeadArticleViewControllerTest.m

//
//  LeadArticleViewControllerTest.m
//

#import <SenTestingKit/SenTestingKit.h>
#define HC_SHORTHAND
#import <OCHamcrestIOS/OCHamcrestIOS.h>
#import <OCMock/OCMock.h>
#import <CoreData/CoreData.h>
#import "AppController.h"
#import "LeadArticlesViewController.h"
#import "TeamStreamViewController.h"
#import "Article.h"

@interface LeadArticlesViewControllerTest : SenTestCase {}
@end

@implementation LeadArticlesViewControllerTest

AppController *app;
LeadArticlesViewController *controller;

- (void)setUp {
    [super setUp];
    app = [AppController sharedAppController];
    controller = [[LeadArticlesViewController alloc] init];        
    [Article clearArticlesInContextAndSave:[app moc]];    
    [controller loadView];
}

- (void)tearDown { 
    [controller release];
    app = nil;
    [super tearDown];
}

- (void)testIBOutletsAreWiredUp {
    assertThat(controller.leadArticlesScrollView, notNilValue());
    assertThat(controller.leadArticlesPageControl, notNilValue());
}

#pragma mark -
#pragma mark viewDidLoadTests

- (void)testViewDidUnload {
    [controller viewDidLoad];
    [controller viewDidUnload];    
    assertThatBool(controller.showingArticles, equalToBool(NO));    
    assertThat(controller.leadArticlesScrollView, nilValue());
    assertThat(controller.leadArticlesPageControl, nilValue());
}

- (void)testViewDidLoadShowsArticles {    
    [app checkForUpdates]; // Populate articles for controller to show
    assertThatBool(controller.showingArticles, equalToBool(NO));    
    [controller viewDidLoad];
    
    // Verify state
    assertThatBool(controller.showingArticles, equalToBool(YES));
    assertThatBool(controller.leadArticlesScrollView.hidden, equalToBool(NO));
    assertThatBool(controller.leadArticlesPageControl.hidden, equalToBool(NO)); 
    assertThat(controller.leadArticlesPageControl, notNilValue());
    
    // Verify showing content
    assertThatInt(controller.leadArticlesPageControl.numberOfPages, greaterThan(NUM_INT(1)));    
    UILabel *label = (UILabel *)[controller.view viewWithTag:kLeadArticleLabelTag];
    assertThat(label.text, doesNotContainString(@"Loading"));
    assertThatInt([label.text length], greaterThan(NUM_INT(1)));
    
}

- (void)testViewDidLoadShowsLoading {
    [app setIsUpdatingInBackground:YES];
    [controller viewDidLoad];
    assertThatBool(controller.leadArticlesPageControl.hidden, equalToBool(YES));
    UILabel *label = (UILabel *)[controller.view viewWithTag:kLeadArticleLabelTag];
    assertThat(label.text, containsString(@"Loading"));
    assertThatBool(controller.showingArticles, equalToBool(YES));
    [app setIsUpdatingInBackground:NO];    
}

- (void)testViewDidLoadHasNothingToShowSoParentControllerShouldHideIt {
    [app setIsUpdatingInBackground:NO];
    [controller viewDidLoad];
    assertThatBool(controller.showingArticles, equalToBool(NO));    
}

#pragma mark -
#pragma mark IBAction tests

- (void)testArticleButtonCallsDidSelectLeadArticle {
    [app checkForUpdates]; // Populate articles for controller to show
    
    // Use a mock parentController to intercept the call to presentModalViewController
    id mockController = [OCMockObject mockForClass:[UIViewController class]];
    [[mockController stub] presentModalViewController:[OCMArg checkWithBlock:^(id articleController) { 
        NSString *urlToLoad = ((TeamStreamViewController *)articleController).initialPath;
        assertThat(urlToLoad, containsString(@"http://bleacherreport.com/articles")); 
        return YES;
    }] animated:YES];    
    [controller setParentController:mockController];
    
    // Get the UIButton for the 2nd article in the scroll view
    [controller viewDidLoad];   
    UIButton *button = (UIButton *)[controller.view viewWithTag:1]; // second article
    assertThat(button, notNilValue());
    
    // Click the button and verify presentModalViewController was called
    [button sendActionsForControlEvents:UIControlEventTouchUpInside];
    [mockController verify];
}

@end