Is it possible to unit test a WindowController thats initialised with a nib?

问题

I have a simple Mac OS application that comes with the default MainMenu.xib. In there I have a second window for preferences and a PreferencesWindowController. I'd like to get the following test working:

@implementation TestPreferencesWindow

- (void)testProtectsUserPasswordByUsingAPasswordField
{
    PreferencesWindowController *controller = [[PreferencesWindowController alloc] initWithWindowNibName:@"MainMenu"];
    XCTAssertInstanceOf([[controller passwordField] class], NSSecureTextField);
}

@end

The problem is that [controller passwordField] is not initialised (because the nib isn't loading?) so it always returns nil.

How do I tell the nib to create all the bindings?

When I call [controller window] is gives the error, and returns nil:

Could not connect the action orderFrontStandardAboutPanel: to target of class PreferencesWindowController

For debugging I have tried the following:

NSBundle *bundle = [NSBundle mainBundle];
XCTAssertNotNil(bundle);
NSString *nibPath = [bundle pathForResource:@"MainMenu" ofType:@"nib"];
XCTAssertNotNil(nibPath); 

PreferencesWindowController *controller = [[PreferencesWindowController alloc] initWithWindowNibPath:nibPath owner:self];
NSLog(@"%@ %@", [controller window], [controller passwordField]);

However it still prints (null) (null) ...

To get rid of the warning:

NSBundle *bundle = [NSBundle mainBundle];
XCTAssertNotNil(bundle);
NSString *nibPath = [bundle pathForResource:@"MainMenu" ofType:@"nib"];
XCTAssertNotNil(nibPath);

NSApplication *app = [NSApplication sharedApplication];
PreferencesWindowController *controller = [[PreferencesWindowController alloc] initWithWindowNibPath:nibPath owner:app];
NSLog(@"%@ %@", [controller window], [controller passwordField]);

No more warning, but still prints (null) (null) .. I feel like I'm getting closer though...

回答1:

I got solution. Write below method in your .m file, and declare public in .h file

MyWindowController.m file

- (instancetype)initWithWindowNibPath:(NSString *)nibPath {
    self = [super initWithWindowNibPath:nibPath owner:self];
    if(self)
    {
        //initialize stuff
    }
    return self;
}

MyWindowController.h file

- (instancetype)initWithWindowNibPath:(NSString *)nibPath;

Now write your code:

NSBundle *bundle = [NSBundle mainBundle];
XCTAssertNotNil(bundle);
NSString *nibPath = [bundle pathForResource:@"MyWindowController" ofType:@"nib"];
XCTAssertNotNil(nibPath); 

MyWindowController *controller = [[MyWindowController alloc] initWithWindowNibPath:nibPath];
NSLog(@"%@ %@", [controller window], [controller passwordField]);

This is works perfect for me.

Reason: owner value not properly set in initWithWindowNibPath method and therefore not set class's properties NSOutlet to nib's control.

来源：https://stackoverflow.com/questions/22086277/is-it-possible-to-unit-test-a-windowcontroller-thats-initialised-with-a-nib

标签

xcode

unit-testing

nib

xctest