[Nullable checker][Objective C] add test for nullable properties in NSArray

Summary: The case of nullable properties was already working but there was no test for it.

Reviewed By: dulmarod

Differential Revision: D8266468

fbshipit-source-id: c074d69

infer/tests/codetoanalyze/objc/nullable/Examples.m

@@ -18,6 +18,7 @@ typedef struct s_ {
 - (T* _Nullable)nullableT;
 @property(nonatomic) S structProperty;
 @property(nonatomic) S* pointerProperty;
+@property(nonatomic, nullable) NSObject* nullableProperty;
 @end
 
 @implementation T {
@@ -128,6 +129,10 @@ typedef struct s_ {
   return array;
 }
 
+- (NSArray*)nullablePropertyInNSArrayBad {
+  return @[ self.nullableMethod ]; // reports here
+}
+
 - (NSArray*)nullableMethodCheckedForNullAndReturnOkay {
   NSObject* nullableObject = [self nullableMethod];
   NSArray* array;

infer/tests/codetoanalyze/objc/nullable/issues.exp

@@ -12,6 +12,7 @@ codetoanalyze/objc/nullable/Examples.m, T_nullableKeyInNSDictionaryBad, 2, NULLA
 codetoanalyze/objc/nullable/Examples.m, T_nullableKeyInNSDictionaryInitBad, 2, NULLABLE_DEREFERENCE, no_bucket, ERROR, [dereference of nullableKey,assignment of the nullable value,definition of nullableMethod]
 codetoanalyze/objc/nullable/Examples.m, T_nullableKeyInNSDictionaryInitLiteralBad, 2, NULLABLE_DEREFERENCE, no_bucket, ERROR, [dereference of nullableKey,assignment of the nullable value,definition of nullableMethod]
 codetoanalyze/objc/nullable/Examples.m, T_nullableObjectInNSArrayBad, 2, NULLABLE_DEREFERENCE, no_bucket, ERROR, [dereference of nullableObject,assignment of the nullable value,definition of nullableMethod]
+codetoanalyze/objc/nullable/Examples.m, T_nullablePropertyInNSArrayBad, 1, NULLABLE_DEREFERENCE, no_bucket, ERROR, [dereferencing the return of nullableMethod,assignment of the nullable value,definition of nullableMethod]
 codetoanalyze/objc/nullable/Examples.m, T_nullableValueInNSDictionaryBad, 2, NULLABLE_DEREFERENCE, no_bucket, ERROR, [dereference of nullableValue,assignment of the nullable value,definition of nullableMethod]
 codetoanalyze/objc/nullable/Examples.m, T_nullableValueInNSDictionaryInitBad, 2, NULLABLE_DEREFERENCE, no_bucket, ERROR, [dereference of nullableValue,assignment of the nullable value,definition of nullableMethod]
 codetoanalyze/objc/nullable/Examples.m, T_nullableValueInNSDictionaryInitLiteralBad, 2, NULLABLE_DEREFERENCE, no_bucket, ERROR, [dereference of nullableValue,assignment of the nullable value,definition of nullableMethod]