test: wip tests for observer

packages/observer/src/autorun.ts

@@ -32,12 +32,13 @@ export type Debugger = (event: DebuggerEvent) => void
 
 export const activeAutorunStack: Autorun[] = []
 
-const ITERATE_KEY = Symbol('iterate')
+export const ITERATE_KEY = Symbol('iterate')
 
 export function createAutorun(fn: Function, options: AutorunOptions): Autorun {
   const runner = function runner(...args): any {
     return run(runner as Autorun, fn, args)
   } as Autorun
+  runner.isAutorun = true
   runner.active = true
   runner.raw = fn
   runner.scheduler = options.scheduler

packages/observer/src/index.ts

@@ -24,6 +24,7 @@ import {
 } from './autorun'
 
 export { Autorun, DebuggerEvent }
+export { OperationTypes } from './operations'
 export { computed, ComputedGetter } from './computed'
 export { lock, unlock } from './lock'
 
@@ -40,7 +41,7 @@ const canObserve = (value: any): boolean => {
   )
 }
 
-type identity = <T>(target: T) => T
+type identity = <T>(target?: T) => T
 
 export const observable = ((target: any = {}): any => {
   // if trying to observe an immutable proxy, return the immutable version.