#import <XCTest/XCTest.h>

#if __has_include("HammingExample.h")
# import "HammingExample.h"
# else
# import "Hamming.h"
#endif

NS_ASSUME_NONNULL_BEGIN

@interface HammingTest : XCTestCase

@end

@implementation HammingTest

- (void)testNoDifferenceBetweenEmptyStrands {
    NSUInteger result = [Hamming compute:@"" against:@""];
    NSUInteger expected = 0;
    XCTAssertEqual(expected,result);
}

- (void)testNoDifferenceBetweenIdenticalStrands {
    NSUInteger result = [Hamming compute:@"GGACTGA" against:@"GGACTGA"];
    NSUInteger expected = 0;
    XCTAssertEqual(expected,result);
}

- (void)testCompleteHammingDistanceInSmallStrand {
    NSUInteger result = [Hamming compute:@"ACT" against:@"GGA"];
    NSUInteger expected = 3;
    XCTAssertEqual(expected,result);
}

- (void)testHammingDistanceInOffByOneStrand {
    NSUInteger result = [Hamming compute:@"GGACGGATTCTG" against:@"AGGACGGATTCT"];
    NSUInteger expected = 9;
    XCTAssertEqual(expected,result);
}

- (void)testSmallHammingDistanceInMiddleSomewhere {
    NSUInteger result = [Hamming compute:@"GGACG" against:@"GGTCG"];
    NSUInteger expected = 1;
    XCTAssertEqual(expected,result);
}

- (void)testLargerDistance {
    NSUInteger result = [Hamming compute:@"ACCAGGG" against:@"ACTATGG"];
    NSUInteger expected = 2;
    XCTAssertEqual(expected,result);
}

@end
NS_ASSUME_NONNULL_END