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Viewing file:     test.js (6.26 KB)      -rw-r--r--

var test = require('tap').test
var fss = require('./')
var clone = require('clone')
var s = JSON.stringify

test('circular reference to root', function (assert) {
  var fixture = {name: 'Tywin Lannister'}
  fixture.circle = fixture
  var expected = s(
    {name: 'Tywin Lannister', circle: '[Circular]'}
  )
  var actual = fss(fixture)
  assert.is(actual, expected)
  assert.end()
})

test('nested circular reference to root', function (assert) {
  var fixture = {name: 'Tywin Lannister'}
  fixture.id = {circle: fixture}
  var expected = s(
    {name: 'Tywin Lannister', id: {circle: '[Circular]'}}
  )
  var actual = fss(fixture)
  assert.is(actual, expected)
  assert.end()
})

test('child circular reference', function (assert) {
  var fixture = {name: 'Tywin Lannister', child: {name: 'Tyrion Lannister'}}
  fixture.child.dinklage = fixture.child
  var expected = s({
    name: 'Tywin Lannister',
    child: {
      name: 'Tyrion Lannister', dinklage: '[Circular]'
    }
  })
  var actual = fss(fixture)
  assert.is(actual, expected)
  assert.end()
})

test('nested child circular reference', function (assert) {
  var fixture = {name: 'Tywin Lannister', child: {name: 'Tyrion Lannister'}}
  fixture.child.actor = {dinklage: fixture.child}
  var expected = s({
    name: 'Tywin Lannister',
    child: {
      name: 'Tyrion Lannister', actor: {dinklage: '[Circular]'}
    }
  })
  var actual = fss(fixture)
  assert.is(actual, expected)
  assert.end()
})

test('circular objects in an array', function (assert) {
  var fixture = {name: 'Tywin Lannister'}
  fixture.hand = [fixture, fixture]
  var expected = s({
    name: 'Tywin Lannister', hand: ['[Circular]', '[Circular]']
  })
  var actual = fss(fixture)
  assert.is(actual, expected)
  assert.end()
})

test('nested circular references in an array', function (assert) {
  var fixture = {
    name: 'Tywin Lannister',
    offspring: [{name: 'Tyrion Lannister'}, {name: 'Cersei Lannister'}]
  }
  fixture.offspring[0].dinklage = fixture.offspring[0]
  fixture.offspring[1].headey = fixture.offspring[1]

  var expected = s({
    name: 'Tywin Lannister',
    offspring: [
      {name: 'Tyrion Lannister', dinklage: '[Circular]'},
      {name: 'Cersei Lannister', headey: '[Circular]'}
    ]
  })
  var actual = fss(fixture)
  assert.is(actual, expected)
  assert.end()
})

test('circular arrays', function (assert) {
  var fixture = []
  fixture.push(fixture, fixture)
  var expected = s(['[Circular]', '[Circular]'])
  var actual = fss(fixture)
  assert.is(actual, expected)
  assert.end()
})

test('nested circular arrays', function (assert) {
  var fixture = []
  fixture.push(
    {name: 'Jon Snow', bastards: fixture},
    {name: 'Ramsay Bolton', bastards: fixture}
  )
  var expected = s([
    {name: 'Jon Snow', bastards: '[Circular]'},
    {name: 'Ramsay Bolton', bastards: '[Circular]'}
  ])
  var actual = fss(fixture)
  assert.is(actual, expected)
  assert.end()
})

test('repeated non-circular references in objects', function (assert) {
  var daenerys = {name: 'Daenerys Targaryen'}
  var fixture = {
    motherOfDragons: daenerys,
    queenOfMeereen: daenerys
  }
  var expected = s(fixture)
  var actual = fss(fixture)
  assert.is(actual, expected)
  assert.end()
})

test('repeated non-circular references in arrays', function (assert) {
  var daenerys = {name: 'Daenerys Targaryen'}
  var fixture = [daenerys, daenerys]
  var expected = s(fixture)
  var actual = fss(fixture)
  assert.is(actual, expected)
  assert.end()
})

test('double child circular reference', function (assert) {
  // create circular reference
  var child = {name: 'Tyrion Lannister'}
  child.dinklage = child

  // include it twice in the fixture
  var fixture = {name: 'Tywin Lannister', childA: child, childB: child}
  var cloned = clone(fixture)
  var expected = s({
    name: 'Tywin Lannister',
    childA: {
      name: 'Tyrion Lannister', dinklage: '[Circular]'
    },
    childB: {
      name: 'Tyrion Lannister', dinklage: '[Circular]'
    }
  })
  var actual = fss(fixture)
  assert.is(actual, expected)

  // check if the fixture has not been modified
  assert.deepEqual(fixture, cloned)
  assert.end()
})

test('child circular reference with toJSON', function (assert) {
  // Create a test object that has an overriden `toJSON` property
  TestObject.prototype.toJSON = function () { return { special: 'case' } }
  function TestObject (content) {}

  // Creating a simple circular object structure
  const parentObject = {}
  parentObject.childObject = new TestObject()
  parentObject.childObject.parentObject = parentObject

  // Creating a simple circular object structure
  const otherParentObject = new TestObject()
  otherParentObject.otherChildObject = {}
  otherParentObject.otherChildObject.otherParentObject = otherParentObject

  // Making sure our original tests work
  assert.deepEqual(parentObject.childObject.parentObject, parentObject)
  assert.deepEqual(otherParentObject.otherChildObject.otherParentObject, otherParentObject)

  // Should both be idempotent
  assert.equal(fss(parentObject), '{"childObject":{"special":"case"}}')
  assert.equal(fss(otherParentObject), '{"special":"case"}')

  // Therefore the following assertion should be `true`
  assert.deepEqual(parentObject.childObject.parentObject, parentObject)
  assert.deepEqual(otherParentObject.otherChildObject.otherParentObject, otherParentObject)

  assert.end()
})

test('null object', function (assert) {
  var expected = s(null)
  var actual = fss(null)
  assert.is(actual, expected)
  assert.end()
})

test('null property', function (assert) {
  var expected = s({ f: null })
  var actual = fss({ f: null })
  assert.is(actual, expected)
  assert.end()
})

test('nested child circular reference in toJSON', function (assert) {
  var b = {}
  var circle = { some: 'data' }
  circle.circle = circle
  var baz = { circle }
  var a = { b, baz }
  var o = {
    a,
    bar: a
  }
  b.toJSON = function () {
    a.b = 2
    return '[Redacted]'
  }
  baz.toJSON = function () {
    a.baz = circle
    return '[Redacted]'
  }
  baz.toJSON.forceDecirc = true

  var expected = s({
    a: {
      b: '[Redacted]',
      baz: '[Redacted]'
    },
    bar: {
      b: 2,
      baz: {
        some: 'data',
        circle: '[Circular]'
      }
    }
  })
  // fixture.child.actor[Symbol.for('forceDecirc')] = true
  var actual = fss(o)
  assert.is(actual, expected)
  assert.end()
})