Function fill

packages/core/src/utils/object.ts:21–46

(source: { [key: string]: any }, name: string, replacementFactory: (...args: any[]) => any)

 */

export function fill(source: { [key: string]: any }, name: string, replacementFactory: (...args: any[]) => any): void {
  if (!(name in source)) {
    return;
  }

  // explicitly casting to unknown because we don't know the type of the method initially at all
  const original = source[name] as unknown;

  if (typeof original !== 'function') {
    return;
  }

  const wrapped = replacementFactory(original) as WrappedFunction;

  // Make sure it's a function first, as we need to attach an empty prototype for `defineProperties` to work
  // otherwise it'll throw "TypeError: Object.defineProperties called on non-object"
  if (typeof wrapped === 'function') {
    markFunctionWrapped(wrapped, original);
  }

  try {
    source[name] = wrapped;
  } catch {
    DEBUG_BUILD && debug.log(`Failed to replace method "${name}" in object`, source);
  }
}

/**
 * Defines a non-enumerable property on the given object.