Test if a value is valid for fs.readFile() options
const assertFsReadFileOption = require('assert-fs-readfile-option');
assertFsReadFileOption({encoding: 'utf8', flag: 'r'});
// doesn't throw
assertFsReadFileOption({flag: 'foo'});
// throws `TypeError [ERR_INVALID_OPT_VALUE]: The value "foo" is invalid for option "flags"`
assertFsReadFileOption('base64');
// doesn't throw
assertFsReadFileOption('base65');
// throws `TypeError [ERR_INVALID_OPT_VALUE_ENCODING]: The value "base65" is invalid for option "encoding"`
assertFsReadFileOption();
// doesn't thrownpm install assert-fs-readfile-option
const assertFsReadFileOption = require('assert-fs-readfile-option');maybeOption: any types
It throws an error when the provided argument is not a valid value for fs.readFile() options.
ISC License © 2017 - 2019 Shinnosuke Watanabe
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