I use a singleton class, so that I can mock the class and change the constants if necessary for testing. The constants class looks like this:
#import <Foundation/Foundation.h>
@interface iCode_Framework : NSObject
@property (readonly, nonatomic) unsigned int iBufCapacity;
@property (readonly, nonatomic) unsigned int iPort;
@property (readonly, nonatomic) NSString * urlStr;
@end
#import "iCode_Framework.h"
static iCode_Framework * instance;
@implementation iCode_Framework
@dynamic iBufCapacity;
@dynamic iPort;
@dynamic urlStr;
- (unsigned int)iBufCapacity
{
return 1024u;
};
- (unsigned int)iPort
{
return 1978u;
};
- (NSString *)urlStr
{
return @"localhost";
};
+ (void)initialize
{
if (!instance) {
instance = [[super allocWithZone:NULL] init];
}
}
+ (id)allocWithZone:(NSZone * const)notUsed
{
return instance;
}
@end
And it is used like this (note the use of a shorthand for the constants c - it saves typing [[Constants alloc] init] every time):
#import "iCode_FrameworkTests.h"
#import "iCode_Framework.h"
static iCode_Framework * c; // Shorthand
@implementation iCode_FrameworkTests
+ (void)initialize
{
c = [[iCode_Framework alloc] init]; // Used like normal class; easy to mock!
}
- (void)testSingleton
{
STAssertNotNil(c, nil);
STAssertEqualObjects(c, [iCode_Framework alloc], nil);
STAssertEquals(c.iBufCapacity, 1024u, nil);
}
@end