Function assert_error

packages/csv-parse/test/api.assert_error.ts:5–42

(
  err: CsvError | CsvError[],
  assert:
    | ({ code?: string; message?: string | RegExp | undefined | null } & T)
    | ({ code?: string; message?: string | RegExp | undefined | null } & T)[],
  exhaustive = false,
)

/* eslint mocha/no-exports: "off" */
export const assert_error = function <T>(
  err: CsvError | CsvError[],
  assert:
    | ({ code?: string; message?: string | RegExp | undefined | null } & T)
    | ({ code?: string; message?: string | RegExp | undefined | null } & T)[],
  exhaustive = false,
) {
  if (Array.isArray(err)) {
    err.forEach((e, i) =>
      assert_error(e, Array.isArray(assert) ? assert[i] : assert),
    );
    return;
  }
  if (exhaustive) {
    for (const key in err) {
      assert.should.have.keys(key);
    }
  }
  err.should.be.an.Error();
  for (const [key, expect] of Object.entries(assert)) {
    let value = err[key];
    if (typeof expect === "string") {
      // eg, convert a buffer
      if (value?.toString) {
        value = value.toString();
      }
      should(value).deepEqual(expect);
    } else if (expect instanceof RegExp) {
      should(value).match(expect);
    } else if (expect === undefined) {
      should(value).be.undefined();
    } else if (expect === null) {
      should(value).be.null();
    } else {
      should(value).deepEqual(expect);
    }
  }
};

describe("API assert_error", function () {
  it("work on array", function () {