08-27-周三_17-09-29

node_modules/weak/test/weakref.js

@@ -0,0 +1,78 @@
+var assert = require('assert')
+var weak = require('../')
+
+describe('Weakref', function () {
+
+  afterEach(gc)
+
+  it('weak() should return a `Weakref` instance', function () {
+    var ref = weak({})
+    assert(weak.isWeakRef(ref))
+  })
+
+  it('should proxy named gets to the target', function () {
+    var o = { foo: 'bar' }
+      , r = weak(o)
+    assert.equal(r.foo, 'bar')
+  })
+
+  it('should proxy named sets to the target', function () {
+    var o = {}
+      , r = weak(o)
+    r.foo = 'bar'
+    assert.equal(r.foo, 'bar')
+  })
+
+  it('should proxy named deletes to the target', function () {
+    var o = { foo: 'bar' }
+     ,  r = weak(o)
+    delete r.foo
+    assert(!r.foo)
+  })
+
+  it('should proxy indexed gets to the target', function () {
+    var a = [ 'foo' ]
+      , r = weak(a)
+    assert.equal(1, a.length)
+    assert.equal(1, r.length)
+    assert.equal('foo', r[0])
+  })
+
+  it('should proxy indexed sets to the target', function () {
+    var a = []
+      , r = weak(a)
+    assert.equal(0, a.length)
+    assert.equal(0, r.length)
+    r[0] = 'foo'
+    assert.equal(1, a.length)
+    assert.equal('foo', a[0])
+    r.push('bar')
+    assert.equal(2, a.length)
+    assert.equal('bar', a[1])
+  })
+
+  it('should proxy indexed deletes to the target', function () {
+    var a = [ 'foo' ]
+      , r = weak(a)
+    delete r[0]
+    assert.equal('undefined', typeof a[0])
+  })
+
+  it('should proxy enumeration', function () {
+    var o = { a: 'a', b: 'b', c: 'c', d: 'd' }
+      , r = weak(o)
+    assert.deepEqual(Object.keys(o), Object.keys(r))
+  })
+
+  it('should act like an empty object after target is gc\'d'
+  , function () {
+    var o = { foo: 'bar' }
+      , r = weak(o)
+    o = null
+    assert.equal('bar', r.foo)
+    gc()
+    assert(!r.foo)
+    assert.equal(0,Object.keys(r).length)
+  })
+
+})