#import <GHUnit/GHUnit.h>
#import "Show.h"
@interface ShowTest : GHTestCase { }
@end

@implementation ShowTest
- (void)testShowCreate
{
    Show *s = [[Show alloc] init];
    GHAssertNotNil(s,@"Was nil.");
}

@end

__objc_classrefs__DATA@0 in ShowTest.o

Show* s = [[objc_getClass("Show") alloc] init];
...

Show* s = [[NSClassFromString(@"Show") alloc] init];
...