Why am I getting invalidArgument exception while running unit test? - objective-c

Question

Inside my Table view controller I have following method
-(BOOL)isValidCoordinate:(CLLocationCoordinate2D)coordinate
{
//This is just to make sure exception is always thrown a cut down version of method
[NSException raise:#"Invalid longitude value" format:#"Longitude of %d is invalid", coordinate.longitude];
return TRUE;
}
I am running a unit test against it and I it failing giving following exception
2011-10-04 22:58:43.380 navman2[74159:ec03] -[MapViewController isValidCoordinate:]: unrecognized selector sent to instance 0x5e20830
2011-10-04 22:58:43.382 navman2[74159:ec03] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[MapViewController isValidCoordinate:]: unrecognized selector sent to instance 0x5e20830'
*** Call stack at first throw:
(
0 CoreFoundation 0x00f555a9 __exceptionPreprocess + 185
1 libobjc.A.dylib 0x010a9313 objc_exception_throw + 44
2 CoreFoundation 0x00f570bb -[NSObject(NSObject) doesNotRecognizeSelector:] + 187
3 CoreFoundation 0x00ec6966 ___forwarding___ + 966
4 CoreFoundation 0x00ec6522 _CF_forwarding_prep_0 + 50
5 navman2Tests 0x05765b41 -[navman2Tests testExceptionThrownBycoordinatesCheck] + 193
6 CoreFoundation 0x00ec5c7d __invoking___ + 29
7 CoreFoundation 0x00ec5b51 -[NSInvocation invoke] + 145
8 SenTestingKit 0x201043d2 -[SenTestCase invokeTest] + 69
9 SenTestingKit 0x20104aa7 -[SenTestCase performTest:] + 192
10 SenTestingKit 0x201041d3 -[SenTest run] + 88
11 SenTestingKit 0x20106eda -[SenTestSuite performTest:] + 115
12 SenTestingKit 0x201041d3 -[SenTest run] + 88
13 SenTestingKit 0x20106eda -[SenTestSuite performTest:] + 115
14 SenTestingKit 0x201041d3 -[SenTest run] + 88
15 SenTestingKit 0x20106eda -[SenTestSuite performTest:] + 115
16 SenTestingKit 0x201041d3 -[SenTest run] + 88
17 SenTestingKit 0x201067a4 +[SenTestProbe runTests:] + 174
18 Foundation 0x0092e79e __NSFireDelayedPerform + 441
19 CoreFoundation 0x00f368c3 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 19
20 CoreFoundation 0x00f37e74 __CFRunLoopDoTimer + 1220
21 CoreFoundation 0x00e942c9 __CFRunLoopRun + 1817
22 CoreFoundation 0x00e93840 CFRunLoopRunSpecific + 208
23 CoreFoundation 0x00e93761 CFRunLoopRunInMode + 97
24 GraphicsServices 0x016171c4 GSEventRunModal + 217
25 GraphicsServices 0x01617289 GSEventRun + 115
26 UIKit 0x001b5c93 UIApplicationMain + 1160
27 navman2 0x000028b9 main + 121
28 navman2 0x00002835 start + 53
)
terminate called throwing an exception(gdb)
Unit test is following:
#import "navman2Tests.h"
#import "TableViewController.h"
#import "MapViewController.h"
#implementation navman2Tests
- (void)setUp
{
[super setUp];
// Set-up czode here.
}
- (void)tearDown
{
// Tear-down code here.
[super tearDown];
}
- (void) testExceptionThrownBycoordinatesCheck
{
TableViewController *newView2 =[[MapViewController alloc] init];
CLLocationCoordinate2D coordinate;
double lat = 61.2180556;
double lng = -149.9002778;
coordinate.latitude = lat;
coordinate.longitude = lng;
STAssertThrows([newView2 isValidCoordinate:coordinate],#"some text description");
[newView2 release];
}
#end

Answer 1

The error is that you did declare newView2 as a TableViewController not a MapViewController (which has that method), change:
TableViewController *newView2 =[[MapViewController alloc] init];
with:
MapViewController *newView2 =[[MapViewController alloc] init];
anyway I would call the variable newViewController rather than newView2 :P