Method markTypeScriptOnlyLines

lib/internal/test_runner/coverage.js:155–204

(fileUrl, source)

  }

  markTypeScriptOnlyLines(fileUrl, source) {
    if (this.#typeScriptLines.has(fileUrl)) {
      return;
    }
    this.#typeScriptLines.add(fileUrl);

    if (RegExpPrototypeExec(kTypeScriptSourceRegex, fileUrl) === null) {
      return;
    }

    const lines = this.getLines(fileUrl, source);
    if (!lines) {
      return;
    }

    let strippedLines;
    const stripSource = getStripTypeScriptTypesForCoverage();

    if (stripSource) {
      source ??= readFileSync(fileURLToPath(fileUrl), 'utf8');

      try {
        strippedLines = RegExpPrototypeSymbolSplit(
          kLineSplitRegex,
          stripSource(source),
        );
      } catch {
        strippedLines = undefined;
      }
    }

    for (let i = 0; i < lines.length; ++i) {
      const originalLine = lines[i].src;

      if (StringPrototypeTrim(originalLine).length === 0) {
        continue;
      }

      if (strippedLines?.[i] !== undefined) {
        if (StringPrototypeTrim(strippedLines[i]).length === 0) {
          lines[i].ignore = true;
        }
        continue;
      }

      if (RegExpPrototypeExec(kTypeOnlyImportRegex, originalLine) !== null) {
        lines[i].ignore = true;
      }
    }
  }

  summary() {
    internalBinding('profiler').takeCoverage();