Function defineCustomInspect

packages/testlab/src/shot.ts:186–191

(
  obj: any,
  inspectFn: (depth: number, opts: any) => {},
)

const custom = Symbol.for('nodejs.util.inspect.custom');

function defineCustomInspect(
  obj: any,
  inspectFn: (depth: number, opts: any) => {},
) {
  obj[custom] = inspectFn;
}