test/Analysis-Apple/NSString.m

// RUN: clang -grsimple -verify %s

#include <Foundation/NSString.h>
#include <Foundation/NSObjCRuntime.h>
#include <Foundation/NSArray.h>

NSComparisonResult f1(NSString* s) {
  NSString *aString = nil;
  return [s compare:aString]; // expected-warning {{Argument to 'NSString' method 'compare:' cannot be nil.}}
}

NSComparisonResult f2(NSString* s) {
  NSString *aString = nil;
  return [s caseInsensitiveCompare:aString]; // expected-warning {{Argument to 'NSString' method 'caseInsensitiveCompare:' cannot be nil.}}
}

NSComparisonResult f3(NSString* s, NSStringCompareOptions op) {
  NSString *aString = nil;
  return [s compare:aString options:op]; // expected-warning {{Argument to 'NSString' method 'compare:options:' cannot be nil.}}
}

NSComparisonResult f4(NSString* s, NSStringCompareOptions op, NSRange R) {
  NSString *aString = nil;
  return [s compare:aString options:op range:R]; // expected-warning {{Argument to 'NSString' method 'compare:options:range:' cannot be nil.}}
}

NSComparisonResult f5(NSString* s, NSStringCompareOptions op, NSRange R) {
  NSString *aString = nil;
  return [s compare:aString options:op range:R locale:nil]; // expected-warning {{Argument to 'NSString' method 'compare:options:range:locale:' cannot be nil.}}
}

NSComparisonResult f6(NSString* s) {
  return [s componentsSeparatedByCharactersInSet:nil]; // expected-warning {{Argument to 'NSString' method 'componentsSeparatedByCharactersInSet:' cannot be nil.}}
}