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