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lordvidex's solution

to Two Fer in the Objective-C Track

Published at Dec 23 2020 · 0 comments
Test suite

Two-fer or 2-fer is short for two for one. One for you and one for me.

"One for X, one for me."

When X is a name or "you".

If the given name is "Alice", the result should be "One for Alice, one for me." If no name is given, the result should be "One for you, one for me."


There are two different methods of getting set up to run the tests with Objective-C:

  • Create an Xcode project with a test target which will run the tests.
  • Use the ruby gem objc as a test runner utility.

Both are described in more detail here: http://exercism.io/languages/objective-c

Submitting Exercises

When submitting an exercise, make sure your solution file is in the same directory as the test code.

The submit command will look something like:

exercism submit <path-to-exercism-workspace>/objective-c/two-fer/TwoFer.m

You can find the Exercism workspace by running exercism debug and looking for the line beginning with Workspace.



Submitting Incomplete Solutions

It's possible to submit an incomplete solution so you can see how others have completed the exercise.


#import <XCTest/XCTest.h>

#if __has_include("TwoFerExample.h")
# import "TwoFerExample.h"
# else
# import "TwoFer.h"

@interface TwoFerTest : XCTestCase


@implementation TwoFerTest

- (void)testNoNameGiven {
    XCTAssertEqualObjects([TwoFer twoFerWithName:nil], @"One for you, one for me.");

- (void)testANameGiven {
    XCTAssertEqualObjects([TwoFer twoFerWithName:@"Alice"], @"One for Alice, one for me.");

- (void)testAnotherNameGiven {
    XCTAssertEqualObjects([TwoFer twoFerWithName:@"Bob"], @"One for Bob, one for me.");

//  TwoFer.m
//  TwoFerTest
//  Created by Evans Owamoyo on 24.12.2020.

#import "TwoFer.h"

@implementation TwoFer
+ (NSString *)twoFerWithName:(NSString *)val{
    return [NSString stringWithFormat:@"One for %@, one for me.",val?:@"you"];

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