我从tutorials获得了以下directFB示例代码:#include#include#includestaticIDirectFB*dfb=NULL;staticIDirectFBSurface*primary=NULL;staticintscreen_width=0;staticintscreen_height=0;#defineDFBCHECK(x...)\{\DFBResulterr=x;\\if(err!=DFB_OK)\{\fprintf(stderr,"%s:\n\t",__FILE__,__LINE__);\DirectFBErrorFatal(#x,err);\}

我正在尝试使用XCTest编写一个或多个测试来驱动drawRect方法的自定义实现的实现，但我不确定如何执行此操作。由于测试，我希望编写的代码如下:-(void)drawRect:(CGRect)rect{CGPointstartOfHorizontalLine=(CGPointMake(1.0f,0.0f));CGPointendOfHorizontalLine=(CGPointMake(1.0f,10.0f));UIColor*lineColour=[UIColorcolorWithRed:40.0f/255.0fgreen:34.0f/255.0fblue:34.0f/255.0