Current File : //proc/self/root/home/infra/fusioninventory/lib/lazy.js-0.5.1/spec/watch_spec.min.js
describe("watch",function(){it("watches an object for changes to the specified property",function(){var object={},callback=jasmine.createSpy();Lazy(object).watch("foo").each(callback);object.foo=1;object.foo="bar";object.foo=null;expect(callback.callCount).toBe(3);expect(callback.calls[0].args).toEqual([{property:"foo",value:1},0]);expect(callback.calls[1].args).toEqual([{property:"foo",value:"bar"},1]);expect(callback.calls[2].args).toEqual([{property:"foo",value:null},2])});it("can watch multiple properties",function(){var object={},callback=jasmine.createSpy();Lazy(object).watch(["foo","bar"]).each(callback);object.foo=1;object.bar=2;expect(callback.callCount).toBe(2);expect(callback.calls[0].args).toEqual([{property:"foo",value:1},0]);expect(callback.calls[1].args).toEqual([{property:"bar",value:2},1])});it("does not exhibit infinite recursion on accesses (!)",function(){var object={foo:1};Lazy(object).watch(["foo"]).each(Lazy.noop);expect(function(){var foo=object.foo}).not.toThrow()});it("does not override the original value",function(){var object={foo:1};Lazy(object).watch("foo").each(Lazy.noop);expect(object.foo).toBe(1)});it("properly updates the value on sets",function(){var object={foo:1};Lazy(object).watch("foo").each(Lazy.noop);object.foo=2;expect(object.foo).toBe(2)});it("provides access to map, filter, etc.",function(){function upcase(str){return str.toUpperCase()}function blank(str){return str.length===0}var object={},callback=jasmine.createSpy();Lazy(object).watch("foo").pluck("value").compact().map(upcase).each(callback);object.foo="";object.foo="bar";object.foo=null;expect(callback.callCount).toBe(1);expect(callback.calls[0].args).toEqual(["BAR",0])});it("works with multiple listeners",function(){var object={},numberCallback=jasmine.createSpy(),stringCallback=jasmine.createSpy();var values=Lazy(object).watch("foo").pluck("value");values.ofType("number").each(numberCallback);values.ofType("string").each(stringCallback);object.foo=5;object.foo="bar";object.foo=10;object.foo="baz";expect(numberCallback.callCount).toBe(2);expect(numberCallback.calls[0].args).toEqual([5,0]);expect(numberCallback.calls[1].args).toEqual([10,1]);expect(stringCallback.callCount).toBe(2);expect(stringCallback.calls[0].args).toEqual(["bar",0]);expect(stringCallback.calls[1].args).toEqual(["baz",1])});it("defaults to all of an object's current properties",function(){var object={foo:1,bar:2,baz:3},callback=jasmine.createSpy();Lazy(object).watch().each(callback);object.foo="yada";object.bar="blah";object.baz="boo";object.moo="woof";expect(callback.callCount).toBe(3);expect(callback.calls[0].args).toEqual([{property:"foo",value:"yada"},0]);expect(callback.calls[1].args).toEqual([{property:"bar",value:"blah"},1]);expect(callback.calls[2].args).toEqual([{property:"baz",value:"boo"},2])});it("allows some listeners to exit early without affecting others",function(){var object={},firstCallback=jasmine.createSpy(),secondCallback=jasmine.createSpy();var values=Lazy(object).watch("foo").pluck("value");values.take(2).each(firstCallback);values.each(secondCallback);object.foo="yabba";object.foo="dabba";object.foo="doo!";expect(firstCallback.callCount).toBe(2);expect(secondCallback.callCount).toBe(3);expect(secondCallback.calls[2].args).toEqual(["doo!",2])})});
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