Function printDiffLine

packages/jest-diff/src/joinAlignedDiffs.ts:21–37

(
  line: string,
  isFirstOrLast: boolean,
  color: DiffOptionsColor,
  indicator: string,
  trailingSpaceFormatter: DiffOptionsColor,
  emptyFirstOrLastLinePlaceholder: string,
)

): string => line.replace(/\s+$/, match => trailingSpaceFormatter(match));

const printDiffLine = (
  line: string,
  isFirstOrLast: boolean,
  color: DiffOptionsColor,
  indicator: string,
  trailingSpaceFormatter: DiffOptionsColor,
  emptyFirstOrLastLinePlaceholder: string,
): string =>
  line.length === 0
    ? indicator === ' '
      ? isFirstOrLast && emptyFirstOrLastLinePlaceholder.length > 0
        ? color(`${indicator} ${emptyFirstOrLastLinePlaceholder}`)
        : ''
      : color(indicator)
    : color(
        `${indicator} ${formatTrailingSpaces(line, trailingSpaceFormatter)}`,
      );

const printDeleteLine = (
  line: string,