是否可以对用笔尖初始化的WindowController进行单元测试?

问题描述

我有一个简单的Mac OS应用程序，它带有默认的MainMenu.xib.在这里，我有第二个偏好设置窗口和PreferencesWindowController.我想进行以下测试:

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

问题在于[controller passwordField]尚未初始化(因为笔尖未加载?)，因此它始终返回nil.

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

我如何告诉笔尖创建所有绑定?

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

当我呼叫[controller window]时给出错误，并返回nil:

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

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

对于调试，我尝试了以下方法:

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]);

但是它仍然会打印(null) (null) ...

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

摆脱警告:

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]);

没有更多警告，但仍显示(null) (null) ..我觉得我越来越近了...

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

推荐答案

我得到了解决方案.在您的.m文件中编写以下方法，并在.h文件中声明public

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

MyWindowController.m文件

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

MyWindowController.h文件

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

现在编写您的代码:

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]);

这对我来说很完美.

原因:所有者值未在initWithWindowNibPath方法中正确设置，因此未将类的属性NSOutlet设置为nib的控件.

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

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