Function mapRangeToLines

lib/internal/test_runner/coverage.js:628–667

(range, lines)

}

function mapRangeToLines(range, lines) {
  const { startOffset, endOffset, count } = range;
  const mappedLines = [];
  let ignoredLines = 0;
  let start = 0;
  let end = lines.length;
  let mid;

  while (start <= end) {
    mid = MathFloor((start + end) / 2);
    let line = lines[mid];

    if (startOffset >= line?.startOffset && startOffset <= line?.endOffset) {
      while (endOffset > line?.startOffset) {
        // If the range is not covered, and the range covers the entire line,
        // then mark that line as not covered.
        if (startOffset <= line.startOffset && endOffset >= line.endOffset) {
          line.count = count;
        }

        ArrayPrototypePush(mappedLines, line);

        if (line.ignore) {
          ignoredLines++;
        }

        mid++;
        line = lines[mid];
      }

      break;
    } else if (startOffset >= line?.endOffset) {
      start = mid + 1;
    } else {
      end = mid - 1;
    }
  }

  return { __proto__: null, lines: mappedLines, ignoredLines };
}

function mergeCoverageScripts(oldScript, newScript) {
  // Merge the functions from the new coverage into the functions from the