Objective-CでLTSV形式の文字列のパース

ライブラリにしようかと思ったら単純なフォーマットだったのでスニペットにした。

main.m

- (NSArray *)objectsWithString:(NSString *)string
{
  NSMutableArray* result = [NSMutableArray array];
  [string enumerateLinesUsingBlock:^(NSString *line, BOOL *stop) {
    NSMutableDictionary* record = [NSMutableDictionary dictionary];
    for (NSString* block in [line componentsSeparatedByString:@"\t"]) {
      NSRange range = [block rangeOfString:@":"];
      if(range.location != NSNotFound){
        [record setObject:[block substringFromIndex:range.location+range.length] forKey:[block substringToIndex:range.location]];
      }
    }
    if(record.allKeys.count > 0){
      [result addObject:record];
    }
  }];
  return result;
}

テストもあるでよ

Tests.m

- (void)testResultCountObjCImpl
{
  NSArray* objects = [self objectsWithString:[self stringSourceFixture]];
  XCTAssertEqual(objects.count, (NSUInteger)3);
}

- (void)testResultKeysCountObjCImpl
{
  NSDictionary* record = [[self objectsWithString:[self stringSourceFixture]] lastObject];
  XCTAssertEqual(record.allKeys.count, [[self labelsFixture] count]);
}

- (void)testResultObjCImpl
{
  NSArray* objects = [self objectsWithString:[self stringSourceFixture]];
  NSDictionary* record = [objects objectAtIndex:0];
  [[self labelsFixture] enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
    BOOL ret = [[record allKeys] containsObject:obj];
    XCTAssertTrue(ret);
  }];
}

- (void)testEmptyString
{
  NSArray* objects = [self objectsWithString:@""];
  XCTAssertEqual(objects.count, (NSUInteger)0);
}

- (void)testInvalidString
{
  NSArray* objects = [self objectsWithString:@"abc-?!bcc"];
  XCTAssertEqual(objects.count, (NSUInteger)0);
}


# pragma mark - Helpers

- (NSString *)stringSourceFixture
{
  //http://d.hatena.ne.jp/naoya/20130209/1360381374
  return @""
  "host:127.0.0.1\tident:-\tuser:frank\ttime:[12/Oct/2000:13:55:36 -0700]\treq:GET /apache_pb.gif HTTP/1.0\tstatus:200\tsize:2326\treferer:http://www.example.com/start.html\tua:Mozilla/4.08 [en] (Win98; I ;Nav)\n"
  "host:127.0.0.1\tident:-\tuser:frank\ttime:[11/Oct/2000:13:55:36 -0700]\treq:GET /apache_pb.gif HTTP/1.0\tstatus:200\tsize:2326\treferer:http://www.example.com/start.html\tua:Mozilla/4.08 [en] (Win98; I ;Nav)\n"
  "host:127.0.0.1\tident:-\tuser:frank\ttime:[10/Oct/2000:13:55:36 -0700]\treq:GET /apache_pb.gif HTTP/1.0\tstatus:200\tsize:2326\treferer:http://www.example.com/start.html\tua:Mozilla/4.08 [en] (Win98; I ;Nav)\n";
}

- (NSArray *)labelsFixture
{
  return @[@"host", @"referer",@"ua", @"user", @"ident", @"time", @"req", @"status", @"size"];
}

- (NSArray *)valuesFixture
{
  return @[@"127.0.0.1",  @"http://www.example.com/start.html",  @"Mozilla/4.08 [en] (Win98; I ;Nav)",  @"frank", @"-",  @"[12/Oct/2000:13:55:36 -0700]",  @"GET /apache_pb.gif HTTP/1.0",  @"200",  @"2326"];
}