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Add a mechanism for boxing nil arguments to prevent an exception when
generating an array of arguments #306 [#86329706]
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Brian Croom
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Jan 17, 2015
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,21 @@ | ||
| #import "CDRNil.h" | ||
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| @implementation CDRNil | ||
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| + (instancetype)nilObject { | ||
| return [[[self alloc] init] autorelease]; | ||
| } | ||
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| - (BOOL)isEqual:(id)object { | ||
| return object==self || [object isMemberOfClass:[self class]]; | ||
| } | ||
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| - (NSString *)description { | ||
| return @"<nil>"; | ||
| } | ||
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| - (id)copyWithZone:(NSZone *)zone { | ||
| return [self retain]; | ||
| } | ||
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| @end |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,12 @@ | ||
| #import <Foundation/Foundation.h> | ||
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| /** | ||
| * CDRNil is an internal class used to box 'nil' values when they need to be put into a | ||
| * Cocoa collection. This is needed beside NSNull to allow differentiating between usages | ||
| * of NSNull and true nils. | ||
| */ | ||
| @interface CDRNil : NSObject <NSCopying> | ||
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| + (instancetype)nilObject; | ||
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| @end |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,31 @@ | ||
| #import <Cedar/Cedar.h> | ||
| #import "CDRNil.h" | ||
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| using namespace Cedar::Matchers; | ||
| using namespace Cedar::Doubles; | ||
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| SPEC_BEGIN(CDRNilSpec) | ||
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| describe(@"CDRNil", ^{ | ||
| __block CDRNil *nilObject; | ||
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| beforeEach(^{ | ||
| nilObject = [CDRNil nilObject]; | ||
| }); | ||
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| it(@"should return itself when copied", ^{ | ||
| CDRNil *copiedNil = [[nilObject copy] autorelease]; | ||
| copiedNil should be_same_instance_as(nilObject); | ||
| }); | ||
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| it(@"should be equal to other instances of CDRNil", ^{ | ||
| CDRNil *anotherNil = [CDRNil nilObject]; | ||
| anotherNil should equal(nilObject); | ||
| }); | ||
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| it(@"should have a clear description indicating what it represents", ^{ | ||
| [nilObject description] should equal(@"<nil>"); | ||
| }); | ||
| }); | ||
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| SPEC_END |
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