getCoverage.ts

Filename	Percent	Threshold	Total	Covered	Uncovered
src/lib/getCoverage.ts	100.00%	0%	91	91	0

import {
  lint,
  AnyInfo,
  FileTypeCheckResult,
  LintOptions
} from "type-coverage-core";

type FileCount = Map<
  string,
  Pick<FileTypeCheckResult, "correctCount" | "totalCount">
>;

export type CoverageData = {
  fileCounts: FileCount;
  anys: AnyInfo[];
  percentage: number;
  total: number;
  covered: number;
  uncovered: number;
};

export type Options = Partial<
  Pick<
    LintOptions,
    | "strict"
    | "debug"
    | "ignoreFiles"
    | "ignoreCatch"
    | "files"
    | "ignoreNested"
    | "ignoreAsAssertion"
    | "ignoreTypeAssertion"
    | "ignoreNonNullAssertion"
    | "ignoreObject"
    | "ignoreEmptyType"
    | "reportSemanticError"
    | "reportUnusedIgnore"
    | "cacheDirectory"
    | "notOnlyInCWD"
  > & {
    cache: LintOptions["enableCache"];
    ignoreUnread: LintOptions["ignoreUnreadAnys"];
    tsProjectFile: string;
  }
>;

const getCoverage = async (options?: Options): Promise<CoverageData> => {
  const {
    tsProjectFile = ".",
    strict,
    debug,
    ignoreFiles,
    ignoreCatch,
    cache: enableCache,
    ignoreUnread: ignoreUnreadAnys,
    files,
    ignoreNested,
    ignoreAsAssertion,
    ignoreTypeAssertion,
    ignoreNonNullAssertion,
    ignoreObject,
    ignoreEmptyType,
    reportSemanticError,
    reportUnusedIgnore,
    cacheDirectory,
    notOnlyInCWD
  } = options || {};

  const { anys, fileCounts, totalCount, correctCount } = await lint(
    tsProjectFile,
    {
      strict,
      debug,
      ignoreFiles,
      ignoreCatch,
      enableCache,
      ignoreUnreadAnys,
      fileCounts: true,
      files,
      ignoreNested,
      ignoreAsAssertion,
      ignoreTypeAssertion,
      ignoreNonNullAssertion,
      ignoreObject,
      ignoreEmptyType,
      reportSemanticError,
      reportUnusedIgnore,
      cacheDirectory,
      notOnlyInCWD
    }
  );
  const percentage = totalCount === 0 ? 100 : (correctCount * 100) / totalCount;

  return {
    fileCounts,
    anys,
    percentage,
    total: totalCount,
    covered: correctCount,
    uncovered: totalCount - correctCount
  };
};

export default getCoverage;

[]

TypeScript Coverage Report generated by type-coverage and typescript-coverage-report at Mon, 28 Sep 2026 15:27:03 GMT

TypeScript coverage report