output-interceptor


Intercepts stdout/ stderr.

Implementation

This module uses domain to capture asynchronous function output.

Read Capturing stdout/ stderr in Node.js using Domain module.

Usage

``js
import {
createOutputInterceptor
} from 'output-interceptor';

const interceptOutput = createOutputInterceptor();

const main = async () => {
const result = await interceptOutput(() => {
console.log('foo');
console.error('bar');

return Promise.resolve('baz');
});

result === 'baz';

interceptOutput.output === 'foo\nbar\n';
};

main();

`

API

`js
/**
* @property interceptStderr Default: true.
* @property interceptStdout Default: true.
* @property stripAnsi Default: true.
*/
export type OutputInterceptorUserConfigurationType = {|
+interceptStderr?: boolean,
+interceptStdout?: boolean,
+stripAnsi?: boolean
|};

/**
* @returns Intercepted output.
*/
type FlushType = () => string;

/**
* @property output Output produced during the executing of the routine.
*/
export type OutputInterceptorType = {|
(routine: () => Promise | T): Promise,
output: ''
|};

createOutputInterceptor(userConfiguration?: OutputInterceptorUserConfigurationType): OutputInterceptorType;

``