Can't import recording appender from typescript

[daniel-beard]

Doesn't look like the types for the recording appender are defined maybe?

import * as recording from "log4js/lib/appenders/recording";

Outputs:

TSError: TypeScript diagnostics (customize using `[jest-config].globals.ts-jest.diagnostics` option):
src/utils/logging.ts:2:27 - error TS7016: Could not find a declaration file for module 'log4js/lib/appenders/recording'. '/project/node_modules/log4js/lib/appenders/recording.js' implicitly has an 'any' type.
  Try `npm install @types/log4js` if it exists or add a new declaration (.d.ts) file containing `declare module 'log4js/lib/appenders/recording';`

2 import { recording } from 'log4js/lib/appenders/recording';
                            ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

Is there a way for me to import this appender in typescript?

[nomiddlename]

It's defined in types/log4js.d.ts but that's from the perspective of using log4js.configure with a recording appender in the config rather than importing it directly in a test. I don't use typescript, so I rely on users to help me with the types - so if you feel like making a PR with the changes you need that would be awesome.

[daniel-beard]

I have not been able to figure out how to do this yet in the source project, however, so far have been able to use this in my project under typings/recording.d.ts:

declare module 'log4js/lib/appenders/recording' {
  import * as log4js from 'log4js';
  export function replay(): log4js.LoggingEvent[];
  export function reset(): void;
}

Which isn't great, but works. Will keep investigating, but am pretty new to TS.

[polo-language]

TypeScript bindings to work with the recording are available in PR #1103. Let me know if it looks good to you.