Clean up ahead of PR.

Signal/test/util/UtilTest.m

@@ -7,6 +7,7 @@
 #import "TestUtil.h"
 #import <SignalMessaging/NSString+OWS.h>
 #import <SignalServiceKit/NSDate+OWS.h>
+#import <SignalServiceKit/NSObject+OWS.h>
 
 @interface NSString (OWS_Test)
 
@@ -104,4 +105,13 @@
     XCTAssertTrue([laterDate isAfterDate:firstDate]);
 }
 
+- (void)testObjectComparison
+{
+    XCTAssertTrue([NSObject isNullableObject:nil equalTo:nil]);
+    XCTAssertFalse([NSObject isNullableObject:@(YES) equalTo:nil]);
+    XCTAssertFalse([NSObject isNullableObject:nil equalTo:@(YES)]);
+    XCTAssertFalse([NSObject isNullableObject:@(YES) equalTo:@(NO)]);
+    XCTAssertTrue([NSObject isNullableObject:@(YES) equalTo:@(YES)]);
+}
+
 @end