var Sinon = require("sinon")
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var stringify = require("..")
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function jsonify(obj) { return JSON.stringify(obj, null, 2) }
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describe("Stringify", function() {
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it("must stringify circular objects", function() {
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var obj = {name: "Alice"}
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obj.self = obj
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var json = stringify(obj, null, 2)
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json.must.eql(jsonify({name: "Alice", self: "[Circular ~]"}))
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})
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it("must stringify circular objects with intermediaries", function() {
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var obj = {name: "Alice"}
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obj.identity = {self: obj}
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var json = stringify(obj, null, 2)
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json.must.eql(jsonify({name: "Alice", identity: {self: "[Circular ~]"}}))
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})
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it("must stringify circular objects deeper", function() {
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var obj = {name: "Alice", child: {name: "Bob"}}
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obj.child.self = obj.child
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stringify(obj, null, 2).must.eql(jsonify({
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name: "Alice",
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child: {name: "Bob", self: "[Circular ~.child]"}
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}))
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})
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it("must stringify circular objects deeper with intermediaries", function() {
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var obj = {name: "Alice", child: {name: "Bob"}}
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obj.child.identity = {self: obj.child}
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stringify(obj, null, 2).must.eql(jsonify({
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name: "Alice",
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child: {name: "Bob", identity: {self: "[Circular ~.child]"}}
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}))
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})
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it("must stringify circular objects in an array", function() {
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var obj = {name: "Alice"}
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obj.self = [obj, obj]
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stringify(obj, null, 2).must.eql(jsonify({
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name: "Alice", self: ["[Circular ~]", "[Circular ~]"]
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}))
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})
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it("must stringify circular objects deeper in an array", function() {
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var obj = {name: "Alice", children: [{name: "Bob"}, {name: "Eve"}]}
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obj.children[0].self = obj.children[0]
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obj.children[1].self = obj.children[1]
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stringify(obj, null, 2).must.eql(jsonify({
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name: "Alice",
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children: [
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{name: "Bob", self: "[Circular ~.children.0]"},
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{name: "Eve", self: "[Circular ~.children.1]"}
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]
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}))
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})
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it("must stringify circular arrays", function() {
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var obj = []
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obj.push(obj)
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obj.push(obj)
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var json = stringify(obj, null, 2)
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json.must.eql(jsonify(["[Circular ~]", "[Circular ~]"]))
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})
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it("must stringify circular arrays with intermediaries", function() {
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var obj = []
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obj.push({name: "Alice", self: obj})
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obj.push({name: "Bob", self: obj})
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stringify(obj, null, 2).must.eql(jsonify([
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{name: "Alice", self: "[Circular ~]"},
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{name: "Bob", self: "[Circular ~]"}
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]))
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})
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it("must stringify repeated objects in objects", function() {
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var obj = {}
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var alice = {name: "Alice"}
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obj.alice1 = alice
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obj.alice2 = alice
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stringify(obj, null, 2).must.eql(jsonify({
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alice1: {name: "Alice"},
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alice2: {name: "Alice"}
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}))
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})
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it("must stringify repeated objects in arrays", function() {
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var alice = {name: "Alice"}
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var obj = [alice, alice]
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var json = stringify(obj, null, 2)
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json.must.eql(jsonify([{name: "Alice"}, {name: "Alice"}]))
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})
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it("must call given decycler and use its output", function() {
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var obj = {}
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obj.a = obj
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obj.b = obj
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var decycle = Sinon.spy(function() { return decycle.callCount })
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var json = stringify(obj, null, 2, decycle)
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json.must.eql(jsonify({a: 1, b: 2}, null, 2))
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decycle.callCount.must.equal(2)
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decycle.thisValues[0].must.equal(obj)
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decycle.args[0][0].must.equal("a")
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decycle.args[0][1].must.equal(obj)
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decycle.thisValues[1].must.equal(obj)
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decycle.args[1][0].must.equal("b")
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decycle.args[1][1].must.equal(obj)
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})
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it("must call replacer and use its output", function() {
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var obj = {name: "Alice", child: {name: "Bob"}}
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var replacer = Sinon.spy(bangString)
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var json = stringify(obj, replacer, 2)
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json.must.eql(jsonify({name: "Alice!", child: {name: "Bob!"}}))
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replacer.callCount.must.equal(4)
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replacer.args[0][0].must.equal("")
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replacer.args[0][1].must.equal(obj)
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replacer.thisValues[1].must.equal(obj)
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replacer.args[1][0].must.equal("name")
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replacer.args[1][1].must.equal("Alice")
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replacer.thisValues[2].must.equal(obj)
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replacer.args[2][0].must.equal("child")
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replacer.args[2][1].must.equal(obj.child)
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replacer.thisValues[3].must.equal(obj.child)
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replacer.args[3][0].must.equal("name")
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replacer.args[3][1].must.equal("Bob")
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})
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it("must call replacer after describing circular references", function() {
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var obj = {name: "Alice"}
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obj.self = obj
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var replacer = Sinon.spy(bangString)
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var json = stringify(obj, replacer, 2)
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json.must.eql(jsonify({name: "Alice!", self: "[Circular ~]!"}))
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replacer.callCount.must.equal(3)
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replacer.args[0][0].must.equal("")
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replacer.args[0][1].must.equal(obj)
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replacer.thisValues[1].must.equal(obj)
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replacer.args[1][0].must.equal("name")
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replacer.args[1][1].must.equal("Alice")
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replacer.thisValues[2].must.equal(obj)
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replacer.args[2][0].must.equal("self")
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replacer.args[2][1].must.equal("[Circular ~]")
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})
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it("must call given decycler and use its output for nested objects",
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function() {
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var obj = {}
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obj.a = obj
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obj.b = {self: obj}
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var decycle = Sinon.spy(function() { return decycle.callCount })
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var json = stringify(obj, null, 2, decycle)
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json.must.eql(jsonify({a: 1, b: {self: 2}}))
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decycle.callCount.must.equal(2)
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decycle.args[0][0].must.equal("a")
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decycle.args[0][1].must.equal(obj)
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decycle.args[1][0].must.equal("self")
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decycle.args[1][1].must.equal(obj)
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})
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it("must use decycler's output when it returned null", function() {
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var obj = {a: "b"}
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obj.self = obj
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obj.selves = [obj, obj]
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function decycle() { return null }
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stringify(obj, null, 2, decycle).must.eql(jsonify({
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a: "b",
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self: null,
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selves: [null, null]
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}))
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})
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it("must use decycler's output when it returned undefined", function() {
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var obj = {a: "b"}
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obj.self = obj
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obj.selves = [obj, obj]
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function decycle() {}
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stringify(obj, null, 2, decycle).must.eql(jsonify({
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a: "b",
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selves: [null, null]
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}))
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})
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it("must throw given a decycler that returns a cycle", function() {
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var obj = {}
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obj.self = obj
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var err
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function identity(key, value) { return value }
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try { stringify(obj, null, 2, identity) } catch (ex) { err = ex }
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err.must.be.an.instanceof(TypeError)
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})
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describe(".getSerialize", function() {
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it("must stringify circular objects", function() {
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var obj = {a: "b"}
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obj.circularRef = obj
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obj.list = [obj, obj]
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var json = JSON.stringify(obj, stringify.getSerialize(), 2)
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json.must.eql(jsonify({
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"a": "b",
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"circularRef": "[Circular ~]",
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"list": ["[Circular ~]", "[Circular ~]"]
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}))
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})
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// This is the behavior as of Mar 3, 2015.
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// The serializer function keeps state inside the returned function and
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// so far I'm not sure how to not do that. JSON.stringify's replacer is not
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// called _after_ serialization.
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xit("must return a function that could be called twice", function() {
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var obj = {name: "Alice"}
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obj.self = obj
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var json
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var serializer = stringify.getSerialize()
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json = JSON.stringify(obj, serializer, 2)
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json.must.eql(jsonify({name: "Alice", self: "[Circular ~]"}))
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json = JSON.stringify(obj, serializer, 2)
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json.must.eql(jsonify({name: "Alice", self: "[Circular ~]"}))
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})
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})
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})
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function bangString(key, value) {
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return typeof value == "string" ? value + "!" : value
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}
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