Passing NSTimer has parameter - iphone

Question

I have method which take NSTimer has parameter which is in Class A
-(void)demoMethod:(NSTimer *)timer{
//Do something!
}
Now I have covering test case for the method:
-(void)testDemoMethodPassNilTimer{
//Created class Instance for the ClassA
ClassA *testA = [[ClassA alloc]init];
//[test testDemoMethod:nil];
STAssertThrows([testA testDemoMethod:nil],#"should throw exception");
}
-(void)testDemoMethodPassTimer{
ClassA *testA = [[ClassA alloc]init];
STAssertNoThrows([testA testDemoMethod:??????]);
}
What should be the proper way to pass the parameter for NSTimer Object for the test Case method testDemoMethodPassTimer?

Answer 1

Give it an actual timer object, but don't schedule it on the run loop.

Answer 2

It was also my need to parse parameter to NSTimer. So I had come up with creation of category class, which helped me.
Here are the steps to create Category class over NSTimer.
Right click on project and select "New File"
Cacoa Touch > Objective-C category > Next
Give Category : additions & Category on : NSTimer
in .h file just create property of placeId
in .m synthesize it using #dynamic & create setter, getter
import that .h file in you file.
NSTimer+additions.h file
#import <Foundation/Foundation.h>
#interface NSTimer (additions)
#property(nonatomic,retain) NSString *additionalTag;
#end
NSTimer+additions.m file
#import "NSTimer+additions.h"
#import <objc/runtime.h>
NSString *const additionalTagKey = #"additionalTagKey";
#implementation NSTimer (additions)
#dynamic additionalTag;
- (void)setAdditionalTag:(NSString*)aObject
{
objc_setAssociatedObject(self, additionalTagKey, aObject, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
- (NSString*)additionalTag
{
return objc_getAssociatedObject(self, additionalTagKey);
}
#end
Now #import "NSTimer+additions.h" in your class using NSTimer
Passing parameter to NSTimer
-(void)testDemoMethodPassTimer{
NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval:1.0f
target:self
selector:#selector(timerTick:)
userInfo:nil
repeats:YES];
timer.additionalTag = #"parameter passed to timer";
ClassA *testA = [[ClassA alloc]init];
STAssertNoThrows([testA testDemoMethod:timer]);
}
Retrieving parameter from timer
-(void)demoMethod:(NSTimer *)timer{
NSLog(#"My Parameter: %#",timer.additionalTag);
}
Many Steps are involved but hopefully help you a bit. :)