如何在 iPhone 中对这个 hitTest 覆盖进行单元测试？

发布于 2024-12-21 16:36:57 字数 663 浏览 3 评论 0原文

如何对这个 hitTest 覆盖进行单元测试？

- (UIView*) hitTest:(CGPoint)point withEvent:(UIEvent *)event {
    UIView* hitView = [super hitTest:point withEvent:event];
    // Do something based on hitView's properties
}

我面临的问题是 UIEvent 没有公共构造函数，因此我无法创建 UIEvent 来在 [super hitTest 上产生不同的结果:point withEvent:event]。

或者，我可以创建一个模拟 UIEvent，但这意味着知道 [super hitTest:point withEvent:event] 用它做什么，而我不知道，即使我做到了，可能会改变。

另一种选择是 swizzle [super hitTest:point withEvent:event] （使用 OCMock）但我不知道是否可以仅调整超类实现。

原文

How can I unit test this hitTest override?

- (UIView*) hitTest:(CGPoint)point withEvent:(UIEvent *)event {
    UIView* hitView = [super hitTest:point withEvent:event];
    // Do something based on hitView's properties
}

The problem I'm facing is that UIEvent does not have a public constructor, and thus I can't create an UIEvent to produce different results on [super hitTest:point withEvent:event].

Alternatively I could create a mock UIEvent, but that would imply knowing what [super hitTest:point withEvent:event] does with it, which I don't, and even if I did, it might change.

Another option would be to swizzle [super hitTest:point withEvent:event] (with OCMock) but I don't know if it's possible to swizzle just the superclass implementation.

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悸初 2024-12-28 16:36:57

您可以包装对 super 的调用并使用部分模拟。

在被测试的类中，创建类似的内容：

-(UIView *)checkHit:(CGPoint)point withEvent:(UIEvent *)event {
    return [super hitTest:point withEvent:event];
}

然后在您的测试类中：

CGPoint testPoint = CGPointMake(1,2);
id mockHitView = [OCMockObject mockForClass:[UIView class]];
id mockSomething = [OCMockObject partialMockForObject:realObject];
[[[mockSomething stub] andReturn:mockHitView] checkHit:testPoint withEvent:[OCMArg any]];

[realObject hitTest:testPoint withEvent:nil];

You could wrap the call to super and use a partial mock.

In the class under test, create something like:

-(UIView *)checkHit:(CGPoint)point withEvent:(UIEvent *)event {
    return [super hitTest:point withEvent:event];
}

Then in your test class:

CGPoint testPoint = CGPointMake(1,2);
id mockHitView = [OCMockObject mockForClass:[UIView class]];
id mockSomething = [OCMockObject partialMockForObject:realObject];
[[[mockSomething stub] andReturn:mockHitView] checkHit:testPoint withEvent:[OCMArg any]];

[realObject hitTest:testPoint withEvent:nil];

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