test(reactive): add mark tests and fix docs typo

packages/reactive/docs/api/markRaw.md

@@ -2,7 +2,7 @@
 
 ## 描述
 
-标记任意一个对象或者类原型为永远不可被 observable 劫持，优先级比 markObservable 低
+标记任意一个对象或者类原型为永远不可被 observable 劫持，优先级比 markObservable 高
 
 ## 签名
 

packages/reactive/src/__tests__/annotations.spec.ts

@@ -1,7 +1,7 @@
 import { observable, action, model } from '../'
 import { autorun, reaction } from '../autorun'
 import { observe } from '../observe'
-import { isObservable } from '../externals'
+import { isObservable, isSupportObservable, markObservable, markRaw } from '../externals'
 
 test('observable annotation', () => {
   const obs = observable<any>({
@@ -243,3 +243,69 @@ test('computed with computed array length', () => {
   obs.arr = []
   expect(handler).toBeCalledWith(false)
 })
+
+test('is support observable', () => {
+  const obs = observable<any>({ aa: 111 })
+  expect(isSupportObservable(obs)).toBeFalsy()
+  expect(isSupportObservable(null)).toBeFalsy()
+  expect(isSupportObservable([])).toBeTruthy()
+  expect(isSupportObservable({})).toBeTruthy()
+  expect(isSupportObservable({ $$typeof: {}, _owner: {} })).toBeFalsy()
+  expect(isSupportObservable({ _isAMomentObject: {} })).toBeFalsy()
+  expect(isSupportObservable({ _isJSONSchemaObject: {} })).toBeFalsy()
+  expect(isSupportObservable({ toJS: () => {} })).toBeFalsy()
+  expect(isSupportObservable({ toJSON: () => {} })).toBeFalsy()
+  expect(isSupportObservable(new Map())).toBeTruthy()
+  expect(isSupportObservable(new WeakMap())).toBeTruthy()
+  expect(isSupportObservable(new Set())).toBeTruthy()
+  expect(isSupportObservable(new WeakSet())).toBeTruthy()
+})
+
+describe('mark operation', () => {
+  test('plain object should be observable', () => {
+    const obs = observable<any>({ aa: 111 })
+    expect(isObservable(obs)).toBeTruthy()
+  })
+
+  test('class instance should be observable', () => {
+    class Class {}
+    const obs = observable<any>(new Class())
+    const obs2 = observable<any>(new Class())
+    expect(isObservable(obs)).toBeTruthy()
+    expect(isObservable(obs2)).toBeTruthy()
+  })
+
+  test('object with toJS function should NOT be observable', () => {
+    const obs = observable<any>({ aa: 111, toJS: () => {} })
+    expect(isObservable(obs)).toBeFalsy()
+  })
+
+  test('plain object marked as raw should NOT be observable', () => {
+    const obs = observable<any>(markRaw({ aa: 111 }))
+    expect(isObservable(obs)).toBeFalsy()
+  })
+
+  test('class marked as raw instance should NOT be observable', () => {
+    class Class {}
+    markRaw(Class)
+    const obs = observable<any>(new Class())
+    const obs2 = observable<any>(new Class())
+    expect(isObservable(obs)).toBeFalsy()
+    expect(isObservable(obs2)).toBeFalsy()
+  })
+
+  test('object with toJS function marked as observable should be observable', () => {
+    const obs = observable<any>(markObservable({ aa: 111, toJS: () => {} }))
+    expect(isObservable(obs)).toBeTruthy()
+  })
+
+  test('plain object marked as raw and observable should NOT be observable', () => {
+    const obs = observable<any>(markRaw(markObservable({ aa: 111 })))
+    expect(isObservable(obs)).toBeFalsy()
+  })
+
+  test('plain object marked as observable and raw should NOT be observable', () => {
+    const obs = observable<any>(markObservable(markRaw({ aa: 111 })))
+    expect(isObservable(obs)).toBeFalsy()
+  })
+})