Fix test attempt

Author: rniwa

clang/test/Analysis/Checkers/WebKit/retain-ptr-ctor-adopt-use-arc.mm

@@ -45,6 +45,10 @@ @implementation SomeObj {
   SomeObj *_other;
 }
 
++ (SomeObj *)sharedInstance {
+  return nil;
+}
+
 - (instancetype)_init {
   self = [super init];
   _number = nil;
@@ -61,6 +65,10 @@ - (SomeObj *)mutableCopy {
   return copy;
 }
 
+- (BOOL)isEqual:(SomeObj *)other {
+  return self.value == other.value && self.next == other.next && _other == other.other;
+}
+
 - (SomeObj *)copyWithValue:(int)value {
   auto *copy = [[SomeObj alloc] init];
   [copy setValue:_number];

clang/test/Analysis/Checkers/WebKit/retain-ptr-ctor-adopt-use.mm

@@ -74,6 +74,10 @@ - (SomeObj *)mutableCopy {
   return copy;
 }
 
+- (BOOL)isEqual:(SomeObj *)other {
+  return self.value == other.value && self.next == other.next && _other == other.other;
+}
+
 - (SomeObj *)copyWithValue:(int)value {
   auto *copy = [[SomeObj alloc] init];
   // expected-warning@-1{{The return value is +1 and results in a memory leak [alpha.webkit.RetainPtrCtorAdoptChecker]}}