Function compareJsonFileToJson

test/utils.ts:153–191

(args: ComparisonArgs)

};

export function compareJsonFileToJson(args: ComparisonArgs) {
  debug(args);

  const { expectedFile, strict } = args;
  const given: any = args.given;

  const jsonString = given.file
    ? callAndReportFailure("Could not read JSON output file", () =>
        fs.readFileSync(given.file, "utf8")
      )
    : callAndReportFailure(
        "Could not run command for JSON output",
        () => exec(given.command).stdout
      );

  const givenJSON = callAndReportFailure("Could not parse output JSON", () =>
    JSON.parse(jsonString)
  );
  const expectedJSON = callAndReportFailure(
    "Could not read or parse expected JSON file",
    () => JSON.parse(fs.readFileSync(expectedFile, "utf8"))
  );

  const allowMissingNull = !!args.allowMissingNull;
  let jsonAreEqual = strict
    ? callAndReportFailure("Failed to strictly compare objects", () =>
        strictDeepEquals(givenJSON, expectedJSON)
      )
    : callAndReportFailure("Failed to compare objects.", () =>
        deepEquals(expectedJSON, givenJSON, allowMissingNull)
      );

  if (!jsonAreEqual) {
    failWith("Error: Output is not equivalent to input.", {
      expectedFile,
      given
    });
  }
}