Current File : //proc/self/root/home/infra/BACKUP-FUSIONINVENTORY/lib/lazy.js-0.5.1/spec/lazy_spec.min.js
describe("Lazy",function(){it("wraps an array which can be easily unwrapped",function(){var result=Lazy(people);expect(result.toArray()).toEqual(people)});it("has no effect if wrapping an already-lazy collection",function(){var doubleWrapped=Lazy(Lazy(people));expect(doubleWrapped.toArray()).toEqual(people)});describe("define",function(){it("requires custom sequences to implement at least getIterator or each",function(){expect(function(){Lazy.Sequence.define("blah",{})}).toThrow()});it("assigns functionality to the Sequence prototype",function(){var HodorSequence=Lazy.Sequence.define("hodor",{each:function(fn){return this.parent.each(function(e){return fn("hodor")})}});expect(Lazy([1,2,3]).hodor().toArray()).toEqual(["hodor","hodor","hodor"])})});describe("generate",function(){it("allows generation of arbitrary sequences",function(){var sequence=Lazy.generate(function(i){return i}).drop(1).take(3).toArray();expect(sequence).toEqual([1,2,3])});it("can be iterated just like any other sequence",function(){var randomNumbers=Lazy.generate(function(i){return Math.random()});randomNumbers.each(function(x){if(x>.5){return false}})});it("provides 'random access'",function(){var naturalNumbers=Lazy.generate(function(i){return i+1});expect(naturalNumbers.get(9)).toEqual(10)});it("has an undefined length",function(){var naturalNumbers=Lazy.generate(function(i){return i+1});expect(naturalNumbers.length()).toBeUndefined()});it("does let you specify a length if you want",function(){var oneThroughFive=Lazy.generate(function(i){return i+1},5).toArray();expect(oneThroughFive).toEqual([1,2,3,4,5])})});describe("range",function(){it("returns a sequence from 0 to stop (exclusive), incremented by 1",function(){expect(Lazy.range(5).toArray()).toEqual([0,1,2,3,4])});it("returns a sequence from start to stop, incremented by 1",function(){expect(Lazy.range(2,7).toArray()).toEqual([2,3,4,5,6])});it("returns a sequence from start to stop, incremented by step",function(){expect(Lazy.range(0,30,5).toArray()).toEqual([0,5,10,15,20,25])});it("returns an empty sequence when start is equal to or greater than stop",function(){expect(Lazy.range(0).toArray()).toEqual([])})});describe("async",function(){createAsyncTest("creates a sequence that can be iterated over asynchronously",{getSequence:function(){return Lazy(people).async().map(Person.getName)},expected:["David","Mary","Lauren","Adam","Daniel","Happy"]});it("on an already-asynchronous sequence, returns the same sequence",function(){var asyncSequence=Lazy(people).async();expect(asyncSequence.async()).toBe(asyncSequence)});describe("when interval is undefined",function(){var context=typeof global!=="undefined"?global:window;if(typeof setImmediate==="function"){it("uses setImmediate if available",function(){var personCount=0;runs(function(){spyOn(context,"setImmediate").andCallThrough();Lazy(people).async().each(function(){++personCount})});waitsFor(function(){return personCount===people.length});runs(function(){expect(context.setImmediate).toHaveBeenCalled();expect(context.setImmediate.callCount).toBeGreaterThan(people.length)})})}else{it("otherwise, uses setTimeout",function(){var personCount=0;runs(function(){spyOn(context,"setTimeout").andCallThrough();Lazy(people).async().each(function(){++personCount})});waitsFor(function(){return personCount===people.length});runs(function(){expect(context.setTimeout).toHaveBeenCalled();expect(context.setTimeout.callCount).toBeGreaterThan(people.length)})})}});describe("the object returned by each()",function(){it("provides a cancel() method, which will stop iteration",function(){var evens=Lazy([1,3,5]).map(increment).async(50),result=[],handle;runs(function(){handle=evens.each(function(even){result.push(even)})});waitsFor(function(){return result.length>0});runs(function(){handle.cancel()});waits(150);runs(function(){expect(result).toEqual([2])})});it("provides an error callback via onError",function(){var rebelSequence=Lazy([1,2,3]).async(50),errorCallback=jasmine.createSpy(),handle;runs(function(){handle=rebelSequence.each(function(x){throw"Oh no, I'm throwing an exception!"});handle.onError(errorCallback)});waitsFor(toBeCalled(errorCallback));runs(function(){expect(errorCallback).toHaveBeenCalled()})})})});describe("toObject",function(){it("converts an array of pairs into an object",function(){var pairs=Lazy(people).map(function(p){return[p.getName(),p]});expect(pairs.toObject()).toEqual({David:david,Mary:mary,Lauren:lauren,Adam:adam,Daniel:daniel,Happy:happy})})});describe("toArray",function(){it("for an object, creates an array of key/value pairs",function(){var pairs=Lazy({foo:"FOO",bar:"BAR"}).toArray();expect(pairs).toEqual([["foo","FOO"],["bar","BAR"]])})});describe("keys",function(){it("iterates over the keys (property names) of an object",function(){var keys=Lazy({foo:"FOO",bar:"BAR"}).keys().toArray();expect(keys).toEqual(["foo","bar"])})});describe("values",function(){it("iterates over the values of an object",function(){var keys=Lazy({foo:"FOO",bar:"BAR"}).values().toArray();expect(keys).toEqual(["FOO","BAR"])})});describe("each",function(){it("passes an index along with each element",function(){expect(Lazy(people)).toPassToEach(1,[0,1,2,3,4,5])})});describe("where",function(){var peopleDtos;beforeEach(function(){peopleDtos=Lazy(people).map(Person.toDto).toArray();Person.reset(people)});it("returns all of the elements with the specified key-value pairs",function(){var namedDavid=Lazy(peopleDtos).where({name:"David"}).toArray();expect(namedDavid).toEqual([{name:"David",age:63,gender:"M"}])})});describe("assign",function(){it("creates a sequence from updating the object with new values",function(){var people={parent:david,child:daniel};var result=Lazy(people).assign({parent:mary});expect(result.toObject()).toEqual({parent:mary,child:daniel})})});describe("functions",function(){it("creates a sequence comprising the function properties of an object",function(){var walk=function(){};var gobble=function(){};var turkey={size:100,weight:100,walk:walk,gobble:gobble};var result=Lazy(turkey).functions();expect(result.toArray()).toEqual(["walk","gobble"])})});describe("invert",function(){it("swaps the keys/values of an object",function(){var object={foo:"bar",marco:"polo"};var result=Lazy(object).invert();expect(result.toObject()).toEqual({bar:"foo",polo:"marco"})})});describe("pick",function(){it("picks only the listed properties from the object",function(){var object={foo:"bar",marco:"polo"};var result=Lazy(object).pick(["marco"]);expect(result.toObject()).toEqual({marco:"polo"})})});describe("omit",function(){it("does the opposite of pick",function(){var object={foo:"bar",marco:"polo"};var result=Lazy(object).omit(["marco"]);expect(result.toObject()).toEqual({foo:"bar"})})});describe("all",function(){it("returns true if the condition holds true for every element",function(){var allPeople=Lazy(people).all(function(x){return x instanceof Person});expect(allPeople).toBe(true)});it("returns false if the condition does not hold true for every element",function(){var allMales=Lazy(people).all(Person.isMale);expect(allMales).toBe(false)})});describe("any",function(){it("returns true if the condition holds true for any element",function(){var anyMales=Lazy(people).any(Person.isMale);expect(anyMales).toBe(true)});it("returns false if the condition does not hold true for any element",function(){var anyUnknownGender=Lazy(people).any(function(x){return x.getGender()==="?"});expect(anyUnknownGender).toBe(false)})});describe("first",function(){it("returns the first element in the collection",function(){var firstGirl=Lazy(people).filter(Person.isFemale).first();expect(firstGirl).toEqual(mary)});it("returns the first N elements in the collection",function(){var firstTwo=Lazy(people).first(2).toArray();expect(firstTwo).toEqual([david,mary])})});describe("last",function(){it("returns the last element in the collection",function(){var lastBoy=Lazy(people).filter(Person.isMale).last();expect(lastBoy).toEqual(daniel)});it("returns the last N elements in the collection",function(){var lastTwo=Lazy(people).last(2).toArray();expect(lastTwo).toEqual([daniel,happy])});it("iterates from the tail if possible",function(){Lazy(people).map(Person.getGender).last();expect(Person.objectsTouched).toEqual(1)})});describe("reduce",function(){it("aggregates the values in the collection according to some function",function(){var sumOfAges=Lazy(people).map(Person.getAge).reduce(function(sum,age){return sum+age},0);expect(sumOfAges).toEqual(240)});it("traverses the collection from left to right",function(){var firstInitials=Lazy(people).reduce(function(array,person){array.push(person.getName().charAt(0));return array},[]);expect(firstInitials).toEqual(["D","M","L","A","D","H"])});it("if no memo is given, starts with the head and reduces over the tail",function(){var familyAcronym=Lazy(people).map(Person.getName).map(function(name){return name.charAt(0).toUpperCase()}).reduce(function(acronym,initial){acronym+=initial;return acronym});expect(familyAcronym).toEqual("DMLADH")});it("passes the index of each element into the accumulator function",function(){var sumOfIndices=Lazy(people).reduce(function(sum,p,i){return sum+i},0);expect(sumOfIndices).toEqual(0+1+2+3+4+5)})});describe("reduceRight",function(){it("traverses the collection from right to left",function(){var firstInitials=Lazy(people).reduceRight(function(array,person){array.push(person.getName().charAt(0));return array},[]);expect(firstInitials).toEqual(["H","D","A","L","M","D"])});it("passes indices in reverse order",function(){var sumOfIndices=Lazy(people).reduceRight(function(str,p,i){return str+i},"");expect(sumOfIndices).toEqual("543210")})});describe("indexOf",function(){it("returns the index of the specified element in the collection",function(){expect(Lazy(people).indexOf(adam)).toEqual(3)})});describe("lastIndexOf",function(){it("returns the last index of the specified element in the collection",function(){var numbers=[0,1,2,3,2,1,0];expect(Lazy(numbers).lastIndexOf(1)).toEqual(5)});it("traverses the collection from the tail end",function(){var names=Lazy(people).map(Person.getName);expect(Lazy(names).lastIndexOf("Daniel")).toEqual(4);expect(Person.objectsTouched).toEqual(2)})});describe("contains",function(){it("returns true if the collection contains the specified element",function(){expect(Lazy(people).contains(adam)).toBe(true)});it("returns false if the collection does not contain the specified element",function(){expect(Lazy(people).contains(new Person("Joe",25,"M"))).toBe(false)})});describe("chaining methods together",function(){ensureLaziness(function(){Lazy(people).filter(Person.isFemale).map(Person.getName).reverse().drop(1).take(2).uniq()});it("applies the effects of all chained methods",function(){var girlNames=Lazy(people).filter(Person.isFemale).map(Person.getName).reverse().drop(1).take(2).uniq().toArray();expect(girlNames).toEqual(["Lauren","Mary"])});describe("filter -> take",function(){it("only ever touches as many objects as necessary",function(){var firstMale=Lazy(people).filter(Person.isMale).map(Person.getGender).take(1).toArray();expect(firstMale).toEqual(["M"]);expect(Person.objectsTouched).toEqual(1)})});describe("take -> map",function(){it("maps the items taken (just making sure)",function(){var firstTwoGenders=Lazy(people).take(2).map(Person.getGender).toArray();expect(firstTwoGenders).toEqual(["M","F"])})});describe("map -> map -> map",function(){function getAgeGroup(age){return age<50?"young":"old"}function getFirstLetter(str){return str.charAt(0)}it("only creates one array from the combination of maps",function(){var ages=Lazy(people).map(Person.getAge).map(getAgeGroup).map(getFirstLetter);ages.toArray();expect(arraysCreated).toEqual(1)})})});xdescribe("parsing JSON",function(){it("translates a JSON array of strings",function(){var json=JSON.stringify(["foo","bar","baz"]);expect(Lazy.parse(json).toArray()).toEqual(["foo","bar","baz"])});it("translates a JSON array of integers",function(){var json=JSON.stringify([1,22,333]);expect(Lazy.parse(json).toArray()).toEqual([1,22,333])});it("translates a JSON array of floats",function(){var json=JSON.stringify([1.2,34.56]);expect(Lazy.parse(json).toArray()).toEqual([1.2,34.56])})})});
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