fetch/test.js at master · github/fetch

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	var IEorEdge = /Edge\//.test(navigator.userAgent) \|\| /MSIE/.test(navigator.userAgent)
	var Chrome = /Chrome\//.test(navigator.userAgent) && !IEorEdge
	var Safari = /Safari\//.test(navigator.userAgent) && !IEorEdge && !Chrome

	var support = {
	url: (function(url) {
	try {
	return new URL(url).toString() === url
	} catch (e) {
	return false
	}
	})('http://example.com/'),
	blob:
	'FileReader' in self &&
	'Blob' in self &&
	(function() {
	try {
	new Blob()
	return true
	} catch (e) {
	return false
	}
	})(),
	formData: 'FormData' in self,
	arrayBuffer: 'ArrayBuffer' in self,
	aborting: 'signal' in new Request(''),
	permanentRedirect: !/Trident/.test(navigator.userAgent)
	}

	function readBlobAsText(blob) {
	if ('FileReader' in self) {
	return new Promise(function(resolve, reject) {
	var reader = new FileReader()
	reader.onload = function() {
	resolve(reader.result)
	}
	reader.onerror = function() {
	reject(reader.error)
	}
	reader.readAsText(blob)
	})
	} else if ('FileReaderSync' in self) {
	return new FileReaderSync().readAsText(blob)
	} else {
	throw new ReferenceError('FileReader is not defined')
	}
	}

	function readBlobAsBytes(blob) {
	if ('FileReader' in self) {
	return new Promise(function(resolve, reject) {
	var reader = new FileReader()
	reader.onload = function() {
	var view = new Uint8Array(reader.result)
	resolve(Array.prototype.slice.call(view))
	}
	reader.onerror = function() {
	reject(reader.error)
	}
	reader.readAsArrayBuffer(blob)
	})
	} else if ('FileReaderSync' in self) {
	return new FileReaderSync().readAsArrayBuffer(blob)
	} else {
	throw new ReferenceError('FileReader is not defined')
	}
	}

	function arrayBufferFromText(text) {
	var buf = new ArrayBuffer(text.length)
	var view = new Uint8Array(buf)

	for (var i = 0; i < text.length; i++) {
	view[i] = text.charCodeAt(i)
	}
	return buf
	}

	function readArrayBufferAsText(buf) {
	var view = new Uint8Array(buf)
	var chars = new Array(view.length)

	for (var i = 0; i < view.length; i++) {
	chars[i] = String.fromCharCode(view[i])
	}
	return chars.join('')
	}

	var preservedGlobals = {}
	var keepGlobals = ['fetch', 'Headers', 'Request', 'Response']
	var exercise = ['polyfill']

	// If native fetch implementation exists, replace it with the polyfilled
	// version at first. The native implementation will be restored before the
	// additional `native` pass of the test suite.
	if (!self.fetch.polyfill) {
	keepGlobals.forEach(function(name) {
	preservedGlobals[name] = self[name]
	self[name] = WHATWGFetch[name]
	})
	exercise.push('native')
	}

	var slice = Array.prototype.slice

	function featureDependent(testOrSuite, condition) {
	;(condition ? testOrSuite : testOrSuite.skip).apply(this, slice.call(arguments, 2))
	}

	exercise.forEach(function(exerciseMode) {
	suite(exerciseMode, function() {
	if (exerciseMode === 'native') {
	suiteSetup(function() {
	keepGlobals.forEach(function(name) {
	self[name] = preservedGlobals[name]
	})
	})
	}

	var nativeChrome = Chrome && exerciseMode === 'native'
	var nativeSafari = Safari && exerciseMode === 'native'
	var nativeEdge = /Edge\//.test(navigator.userAgent) && exerciseMode === 'native'
	var firefox = navigator.userAgent.match(/Firefox\/(\d+)/)
	var brokenFF = firefox && firefox[1] <= 56 && exerciseMode === 'native'
	var emptyDefaultStatusText =
	exerciseMode !== 'native' \|\| (exerciseMode === 'native' && (Chrome \|\| (firefox && firefox[1] >= 67)))
	var polyfillFirefox = firefox && exerciseMode === 'polyfill'
	var omitSafari =
	Safari && exerciseMode === 'native' && navigator.userAgent.match(/Version\/(\d+\.\d+)/)[1] <= '11.1'

	// https://fetch.spec.whatwg.org/#concept-bodyinit-extract
	function testBodyExtract(factory) {
	suite('body extract', function() {
	var expected = 'Hello World!'
	var inputs = [['type USVString', expected]]
	if (support.blob) {
	inputs.push(['type Blob', new Blob([expected])])
	}
	if (support.arrayBuffer) {
	inputs = inputs.concat([
	['type ArrayBuffer', arrayBufferFromText(expected)],
	['type TypedArray', new Uint8Array(arrayBufferFromText(expected))],
	['type DataView', new DataView(arrayBufferFromText(expected))]
	])
	}

	inputs.forEach(function(input) {
	var typeLabel = input[0],
	body = input[1]

	suite(typeLabel, function() {
	featureDependent(test, support.blob, 'consume as blob', function() {
	var r = factory(body)
	return r
	.blob()
	.then(readBlobAsText)
	.then(function(text) {
	assert.equal(text, expected)
	})
	})

	test('consume as text', function() {
	var r = factory(body)
	return r.text().then(function(text) {
	assert.equal(text, expected)
	})
	})

	featureDependent(test, support.arrayBuffer, 'consume as array buffer', function() {
	var r = factory(body)
	return r
	.arrayBuffer()
	.then(readArrayBufferAsText)
	.then(function(text) {
	assert.equal(text, expected)
	})
	})
	})
	})
	})
	}

	// https://fetch.spec.whatwg.org/#headers-class
	suite('Headers', function() {
	test('constructor copies headers', function() {
	var original = new Headers()
	original.append('Accept', 'application/json')
	original.append('Accept', 'text/plain')
	original.append('Content-Type', 'text/html')

	var headers = new Headers(original)
	assert.equal(headers.get('Accept'), 'application/json, text/plain')
	assert.equal(headers.get('Content-type'), 'text/html')
	})
	test('constructor works with arrays', function() {
	var array = [
	['Content-Type', 'text/xml'],
	['Breaking-Bad', '<3']
	]
	var headers = new Headers(array)

	assert.equal(headers.get('Content-Type'), 'text/xml')
	assert.equal(headers.get('Breaking-Bad'), '<3')
	})
	test('headers are case insensitive', function() {
	var headers = new Headers({Accept: 'application/json'})
	assert.equal(headers.get('ACCEPT'), 'application/json')
	assert.equal(headers.get('Accept'), 'application/json')
	assert.equal(headers.get('accept'), 'application/json')
	})
	test('appends to existing', function() {
	var headers = new Headers({Accept: 'application/json'})
	assert.isFalse(headers.has('Content-Type'))
	headers.append('Content-Type', 'application/json')
	assert.isTrue(headers.has('Content-Type'))
	assert.equal(headers.get('Content-Type'), 'application/json')
	})
	test('appends values to existing header name', function() {
	var headers = new Headers({Accept: 'application/json'})
	headers.append('Accept', 'text/plain')
	assert.equal(headers.get('Accept'), 'application/json, text/plain')
	})
	test('sets header name and value', function() {
	var headers = new Headers()
	headers.set('Content-Type', 'application/json')
	assert.equal(headers.get('Content-Type'), 'application/json')
	})
	test('returns null on no header found', function() {
	var headers = new Headers()
	assert.isNull(headers.get('Content-Type'))
	})
	test('has headers that are set', function() {
	var headers = new Headers()
	headers.set('Content-Type', 'application/json')
	assert.isTrue(headers.has('Content-Type'))
	})
	test('deletes headers', function() {
	var headers = new Headers()
	headers.set('Content-Type', 'application/json')
	assert.isTrue(headers.has('Content-Type'))
	headers.delete('Content-Type')
	assert.isFalse(headers.has('Content-Type'))
	assert.isNull(headers.get('Content-Type'))
	})
	test('converts field name to string on set and get', function() {
	var headers = new Headers()
	headers.set(1, 'application/json')
	assert.isTrue(headers.has('1'))
	assert.equal(headers.get(1), 'application/json')
	})
	test('converts field value to string on set and get', function() {
	var headers = new Headers()
	headers.set('Content-Type', 1)
	headers.set('X-CSRF-Token', undefined)
	assert.equal(headers.get('Content-Type'), '1')
	assert.equal(headers.get('X-CSRF-Token'), 'undefined')
	})
	test('throws TypeError on invalid character in field name', function() {
	assert.throws(function() {
	new Headers({'[Accept]': 'application/json'})
	}, TypeError)
	assert.throws(function() {
	new Headers({'Accept:': 'application/json'})
	}, TypeError)
	assert.throws(function() {
	var headers = new Headers()
	headers.set({field: 'value'}, 'application/json')
	}, TypeError)
	assert.throws(function() {
	new Headers({'': 'application/json'})
	}, TypeError)
	})
	featureDependent(test, !brokenFF, 'is iterable with forEach', function() {
	var headers = new Headers()
	headers.append('Accept', 'application/json')
	headers.append('Accept', 'text/plain')
	headers.append('Content-Type', 'text/html')

	var results = []
	headers.forEach(function(value, key, object) {
	results.push({value: value, key: key, object: object})
	})

	assert.equal(results.length, 2)
	assert.deepEqual({key: 'accept', value: 'application/json, text/plain', object: headers}, results[0])
	assert.deepEqual({key: 'content-type', value: 'text/html', object: headers}, results[1])
	})
	test('forEach accepts second thisArg argument', function() {
	var headers = new Headers({Accept: 'application/json'})
	var thisArg = 42
	headers.forEach(function() {
	assert.equal(this, thisArg)
	}, thisArg)
	})
	featureDependent(test, !brokenFF, 'is iterable with keys', function() {
	var headers = new Headers()
	headers.append('Accept', 'application/json')
	headers.append('Accept', 'text/plain')
	headers.append('Content-Type', 'text/html')

	var iterator = headers.keys()
	assert.deepEqual({done: false, value: 'accept'}, iterator.next())
	assert.deepEqual({done: false, value: 'content-type'}, iterator.next())
	assert.deepEqual({done: true, value: undefined}, iterator.next())
	})
	featureDependent(test, !brokenFF, 'is iterable with values', function() {
	var headers = new Headers()
	headers.append('Accept', 'application/json')
	headers.append('Accept', 'text/plain')
	headers.append('Content-Type', 'text/html')

	var iterator = headers.values()
	assert.deepEqual({done: false, value: 'application/json, text/plain'}, iterator.next())
	assert.deepEqual({done: false, value: 'text/html'}, iterator.next())
	assert.deepEqual({done: true, value: undefined}, iterator.next())
	})
	featureDependent(test, !brokenFF, 'is iterable with entries', function() {
	var headers = new Headers()
	headers.append('Accept', 'application/json')
	headers.append('Accept', 'text/plain')
	headers.append('Content-Type', 'text/html')

	var iterator = headers.entries()
	assert.deepEqual({done: false, value: ['accept', 'application/json, text/plain']}, iterator.next())
	assert.deepEqual({done: false, value: ['content-type', 'text/html']}, iterator.next())
	assert.deepEqual({done: true, value: undefined}, iterator.next())
	})
	})

	// https://fetch.spec.whatwg.org/#request-class
	suite('Request', function() {
	test('called as normal function', function() {
	assert.throws(function() {
	Request('https://fetch.spec.whatwg.org/')
	})
	})
	test('construct with string url', function() {
	var request = new Request('https://fetch.spec.whatwg.org/')
	assert.equal(request.url, 'https://fetch.spec.whatwg.org/')
	})

	featureDependent(test, support.url, 'construct with URL instance', function() {
	var url = new URL('https://fetch.spec.whatwg.org/')
	url.pathname = 'cors'
	var request = new Request(url)
	assert.equal(request.url, 'https://fetch.spec.whatwg.org/cors')
	})

	test('construct with non-Request object', function() {
	var url = {
	toString: function() {
	return 'https://fetch.spec.whatwg.org/'
	}
	}
	var request = new Request(url)
	assert.equal(request.url, 'https://fetch.spec.whatwg.org/')
	})

	test('construct with Request', function() {
	var request1 = new Request('https://fetch.spec.whatwg.org/', {
	method: 'post',
	body: 'I work out',
	headers: {
	accept: 'application/json',
	'Content-Type': 'text/plain'
	}
	})
	var request2 = new Request(request1)

	return request2.text().then(function(body2) {
	assert.equal(body2, 'I work out')
	assert.equal(request2.method, 'POST')
	assert.equal(request2.url, 'https://fetch.spec.whatwg.org/')
	assert.equal(request2.headers.get('accept'), 'application/json')
	assert.equal(request2.headers.get('content-type'), 'text/plain')

	return request1.text().then(
	function() {
	assert(false, 'original request body should have been consumed')
	},
	function(error) {
	assert(error instanceof TypeError, 'expected TypeError for already read body')
	}
	)
	})
	})

	test('construct with Request and override headers', function() {
	var request1 = new Request('https://fetch.spec.whatwg.org/', {
	method: 'post',
	body: 'I work out',
	headers: {
	accept: 'application/json',
	'X-Request-ID': '123'
	}
	})
	var request2 = new Request(request1, {
	headers: {'x-test': '42'}
	})

	assert.equal(request2.headers.get('accept'), undefined)
	assert.equal(request2.headers.get('x-request-id'), undefined)
	assert.equal(request2.headers.get('x-test'), '42')
	})

	test('construct with Request and override body', function() {
	var request1 = new Request('https://fetch.spec.whatwg.org/', {
	method: 'post',
	body: 'I work out',
	headers: {
	'Content-Type': 'text/plain'
	}
	})
	var request2 = new Request(request1, {
	body: '{"wiggles": 5}',
	headers: {'Content-Type': 'application/json'}
	})

	return request2.json().then(function(data) {
	assert.equal(data.wiggles, 5)
	assert.equal(request2.headers.get('content-type'), 'application/json')
	})
	})

	featureDependent(test, !nativeChrome, 'construct with used Request body', function() {
	var request1 = new Request('https://fetch.spec.whatwg.org/', {
	method: 'post',
	body: 'I work out'
	})

	return request1.text().then(function() {
	assert.throws(function() {
	new Request(request1)
	}, TypeError)
	})
	})

	test('GET should not have implicit Content-Type', function() {
	var req = new Request('https://fetch.spec.whatwg.org/')
	assert.equal(req.headers.get('content-type'), undefined)
	})

	test('POST with blank body should not have implicit Content-Type', function() {
	var req = new Request('https://fetch.spec.whatwg.org/', {
	method: 'post'
	})
	assert.equal(req.headers.get('content-type'), undefined)
	})

	test('construct with string body sets Content-Type header', function() {
	var req = new Request('https://fetch.spec.whatwg.org/', {
	method: 'post',
	body: 'I work out'
	})

	assert.equal(req.headers.get('content-type'), 'text/plain;charset=UTF-8')
	})

	featureDependent(test, support.blob, 'construct with Blob body and type sets Content-Type header', function() {
	var req = new Request('https://fetch.spec.whatwg.org/', {
	method: 'post',
	body: new Blob(['test'], {type: 'image/png'})
	})

	assert.equal(req.headers.get('content-type'), 'image/png')
	})

	test('construct with body and explicit header uses header', function() {
	var req = new Request('https://fetch.spec.whatwg.org/', {
	method: 'post',
	headers: {'Content-Type': 'image/png'},
	body: 'I work out'
	})

	assert.equal(req.headers.get('content-type'), 'image/png')
	})

	featureDependent(test, support.blob, 'construct with Blob body and explicit Content-Type header', function() {
	var req = new Request('https://fetch.spec.whatwg.org/', {
	method: 'post',
	headers: {'Content-Type': 'image/png'},
	body: new Blob(['test'], {type: 'text/plain'})
	})

	assert.equal(req.headers.get('content-type'), 'image/png')
	})

	featureDependent(test, !IEorEdge, 'construct with URLSearchParams body sets Content-Type header', function() {
	var req = new Request('https://fetch.spec.whatwg.org/', {
	method: 'post',
	body: new URLSearchParams('a=1&b=2')
	})

	assert.equal(req.headers.get('content-type'), 'application/x-www-form-urlencoded;charset=UTF-8')
	})

	featureDependent(
	test,
	!IEorEdge,
	'construct with URLSearchParams body and explicit Content-Type header',
	function() {
	var req = new Request('https://fetch.spec.whatwg.org/', {
	method: 'post',
	headers: {'Content-Type': 'image/png'},
	body: new URLSearchParams('a=1&b=2')
	})

	assert.equal(req.headers.get('content-type'), 'image/png')
	}
	)

	test('construct with unsupported body type', function() {
	var req = new Request('https://fetch.spec.whatwg.org/', {
	method: 'post',
	body: {}
	})

	assert.equal(req.headers.get('content-type'), 'text/plain;charset=UTF-8')
	return req.text().then(function(bodyText) {
	assert.equal(bodyText, '[object Object]')
	})
	})

	test('construct with null body', function() {
	var req = new Request('https://fetch.spec.whatwg.org/', {
	method: 'post'
	})

	assert.isNull(req.headers.get('content-type'))
	return req.text().then(function(bodyText) {
	assert.equal(bodyText, '')
	})
	})

	test('clone GET request', function() {
	var req = new Request('https://fetch.spec.whatwg.org/', {
	headers: {'content-type': 'text/plain'}
	})
	var clone = req.clone()

	assert.equal(clone.url, req.url)
	assert.equal(clone.method, 'GET')
	assert.equal(clone.headers.get('content-type'), 'text/plain')
	assert.notEqual(clone.headers, req.headers)
	assert.isFalse(req.bodyUsed)
	})

	test('clone POST request', function() {
	var req = new Request('https://fetch.spec.whatwg.org/', {
	method: 'post',
	headers: {'content-type': 'text/plain'},
	body: 'I work out'
	})
	var clone = req.clone()

	assert.equal(clone.method, 'POST')
	assert.equal(clone.headers.get('content-type'), 'text/plain')
	assert.notEqual(clone.headers, req.headers)
	assert.equal(req.bodyUsed, false)

	return Promise.all([clone.text(), req.clone().text()]).then(function(bodies) {
	assert.deepEqual(bodies, ['I work out', 'I work out'])
	})
	})

	featureDependent(test, !nativeChrome, 'clone with used Request body', function() {
	var req = new Request('https://fetch.spec.whatwg.org/', {
	method: 'post',
	body: 'I work out'
	})

	return req.text().then(function() {
	assert.throws(function() {
	req.clone()
	}, TypeError)
	})
	})

	testBodyExtract(function(body) {
	return new Request('', {method: 'POST', body: body})
	})

	featureDependent(test, !omitSafari, 'credentials defaults to same-origin', function() {
	var request = new Request('')
	assert.equal(request.credentials, 'same-origin')
	})

	test('credentials is overridable', function() {
	var request = new Request('', {credentials: 'omit'})
	assert.equal(request.credentials, 'omit')
	})
	})

	// https://fetch.spec.whatwg.org/#response-class
	suite('Response', function() {
	featureDependent(test, emptyDefaultStatusText, 'default status is 200', function() {
	var res = new Response()
	assert.equal(res.status, 200)
	assert.equal(res.statusText, '')
	assert.isTrue(res.ok)
	})

	featureDependent(
	test,
	emptyDefaultStatusText,
	'default status is 200 when an explicit undefined status code is passed',
	function() {
	var res = new Response('', {status: undefined})
	assert.equal(res.status, 200)
	assert.equal(res.statusText, '')
	assert.isTrue(res.ok)
	}
	)

	testBodyExtract(function(body) {
	return new Response(body)
	})

	test('called as normal function', function() {
	assert.throws(function() {
	Response('{"foo":"bar"}', {headers: {'content-type': 'application/json'}})
	})
	})
	test('creates Headers object from raw headers', function() {
	var r = new Response('{"foo":"bar"}', {headers: {'content-type': 'application/json'}})
	assert.equal(r.headers instanceof Headers, true)
	return r.json().then(function(json) {
	assert.equal(json.foo, 'bar')
	return json
	})
	})

	test('always creates a new Headers instance', function() {
	var headers = new Headers({'x-hello': 'world'})
	var res = new Response('', {headers: headers})

	assert.equal(res.headers.get('x-hello'), 'world')
	assert.notEqual(res.headers, headers)
	})

	test('clone text response', function() {
	var res = new Response('{"foo":"bar"}', {
	headers: {'content-type': 'application/json'}
	})
	var clone = res.clone()

	assert.notEqual(clone.headers, res.headers, 'headers were cloned')
	assert.equal(clone.headers.get('content-type'), 'application/json')

	return Promise.all([clone.json(), res.json()]).then(function(jsons) {
	assert.deepEqual(jsons[0], jsons[1], 'json of cloned object is the same as original')
	})
	})

	featureDependent(test, support.blob, 'clone blob response', function() {
	var req = new Request(new Blob(['test']))
	req.clone()
	assert.equal(req.bodyUsed, false)
	})

	test('error creates error Response', function() {
	var r = Response.error()
	assert(r instanceof Response)
	assert.equal(r.status, 0)
	assert.equal(r.statusText, '')
	assert.equal(r.type, 'error')
	})

	test('redirect creates redirect Response', function() {
	var r = Response.redirect('https://fetch.spec.whatwg.org/', 301)
	assert(r instanceof Response)
	assert.equal(r.status, 301)
	assert.equal(r.headers.get('Location'), 'https://fetch.spec.whatwg.org/')
	})

	test('construct with string body sets Content-Type header', function() {
	var r = new Response('I work out')
	assert.equal(r.headers.get('content-type'), 'text/plain;charset=UTF-8')
	})

	featureDependent(test, support.blob, 'construct with Blob body and type sets Content-Type header', function() {
	var r = new Response(new Blob(['test'], {type: 'text/plain'}))
	assert.equal(r.headers.get('content-type'), 'text/plain')
	})

	test('construct with body and explicit header uses header', function() {
	var r = new Response('I work out', {
	headers: {
	'Content-Type': 'text/plain'
	}
	})

	assert.equal(r.headers.get('content-type'), 'text/plain')
	})

	test('construct with undefined statusText', function() {
	var r = new Response('', {statusText: undefined})
	assert.equal(r.statusText, '')
	})

	test('construct with null statusText', function() {
	var r = new Response('', {statusText: null})
	assert.equal(r.statusText, 'null')
	})

	test('init object as first argument', function() {
	var r = new Response({
	status: 201,
	headers: {
	'Content-Type': 'text/html'
	}
	})

	assert.equal(r.status, 200)
	assert.equal(r.headers.get('content-type'), 'text/plain;charset=UTF-8')
	return r.text().then(function(bodyText) {
	assert.equal(bodyText, '[object Object]')
	})
	})

	test('null as first argument', function() {
	var r = new Response(null)

	assert.isNull(r.headers.get('content-type'))
	return r.text().then(function(bodyText) {
	assert.equal(bodyText, '')
	})
	})
	})

	// https://fetch.spec.whatwg.org/#body-mixin
	suite('Body mixin', function() {
	featureDependent(suite, support.blob, 'arrayBuffer', function() {
	test('resolves arrayBuffer promise', function() {
	return fetch('/hello')
	.then(function(response) {
	return response.arrayBuffer()
	})
	.then(function(buf) {
	assert(buf instanceof ArrayBuffer, 'buf is an ArrayBuffer instance')
	assert.equal(buf.byteLength, 2)
	})
	})

	test('arrayBuffer handles binary data', function() {
	return fetch('/binary')
	.then(function(response) {
	return response.arrayBuffer()
	})
	.then(function(buf) {
	assert(buf instanceof ArrayBuffer, 'buf is an ArrayBuffer instance')
	assert.equal(buf.byteLength, 256, 'buf.byteLength is correct')
	var view = new Uint8Array(buf)
	for (var i = 0; i < 256; i++) {
	assert.equal(view[i], i)
	}
	})
	})

	test('arrayBuffer handles utf-8 data', function() {
	return fetch('/hello/utf8')
	.then(function(response) {
	return response.arrayBuffer()
	})
	.then(function(buf) {
	assert(buf instanceof ArrayBuffer, 'buf is an ArrayBuffer instance')
	assert.equal(buf.byteLength, 5, 'buf.byteLength is correct')
	var octets = Array.prototype.slice.call(new Uint8Array(buf))
	assert.deepEqual(octets, [104, 101, 108, 108, 111])
	})
	})

	test('arrayBuffer handles utf-16le data', function() {
	return fetch('/hello/utf16le')
	.then(function(response) {
	return response.arrayBuffer()
	})
	.then(function(buf) {
	assert(buf instanceof ArrayBuffer, 'buf is an ArrayBuffer instance')
	assert.equal(buf.byteLength, 10, 'buf.byteLength is correct')
	var octets = Array.prototype.slice.call(new Uint8Array(buf))
	assert.deepEqual(octets, [104, 0, 101, 0, 108, 0, 108, 0, 111, 0])
	})
	})

	test('rejects arrayBuffer promise after body is consumed', function() {
	return fetch('/hello')
	.then(function(response) {
	assert.equal(response.bodyUsed, false)
	response.blob()
	assert.equal(response.bodyUsed, true)
	return response.arrayBuffer()
	})
	.catch(function(error) {
	assert(error instanceof TypeError, 'Promise rejected after body consumed')
	})
	})
	})

	featureDependent(suite, support.blob, 'blob', function() {
	test('resolves blob promise', function() {
	return fetch('/hello')
	.then(function(response) {
	return response.blob()
	})
	.then(function(blob) {
	assert(blob instanceof Blob, 'blob is a Blob instance')
	assert.equal(blob.size, 2)
	})
	})

	test('blob handles binary data', function() {
	return fetch('/binary')
	.then(function(response) {
	return response.blob()
	})
	.then(function(blob) {
	assert(blob instanceof Blob, 'blob is a Blob instance')
	assert.equal(blob.size, 256, 'blob.size is correct')
	})
	})

	test('blob handles utf-8 data', function() {
	return fetch('/hello/utf8')
	.then(function(response) {
	return response.blob()
	})
	.then(readBlobAsBytes)
	.then(function(octets) {
	assert.equal(octets.length, 5, 'blob.size is correct')
	assert.deepEqual(octets, [104, 101, 108, 108, 111])
	})
	})

	test('blob handles utf-16le data', function() {
	return fetch('/hello/utf16le')
	.then(function(response) {
	return response.blob()
	})
	.then(readBlobAsBytes)
	.then(function(octets) {
	assert.equal(octets.length, 10, 'blob.size is correct')
	assert.deepEqual(octets, [104, 0, 101, 0, 108, 0, 108, 0, 111, 0])
	})
	})

	test('rejects blob promise after body is consumed', function() {
	return fetch('/hello')
	.then(function(response) {
	assert(response.blob, 'Body does not implement blob')
	assert.equal(response.bodyUsed, false)
	response.text()
	assert.equal(response.bodyUsed, true)
	return response.blob()
	})
	.catch(function(error) {
	assert(error instanceof TypeError, 'Promise rejected after body consumed')
	})
	})
	})

	featureDependent(suite, support.formData, 'formData', function() {
	test('post sets content-type header', function() {
	return fetch('/request', {
	method: 'post',
	body: new FormData()
	})
	.then(function(response) {
	return response.json()
	})
	.then(function(json) {
	assert.equal(json.method, 'POST')
	assert(/^multipart\/form-data;/.test(json.headers['content-type']))
	})
	})

	featureDependent(test, !nativeChrome && !nativeEdge, 'formData rejects after body was consumed', function() {
	return fetch('/json')
	.then(function(response) {
	assert(response.formData, 'Body does not implement formData')
	response.formData()
	return response.formData()
	})
	.catch(function(error) {
	if (error instanceof chai.AssertionError) {
	throw error
	} else {
	assert(error instanceof TypeError, 'Promise rejected after body consumed')
	}
	})
	})

	featureDependent(
	test,
	!nativeChrome && !nativeSafari && !nativeEdge,
	'parses form encoded response',
	function() {
	return fetch('/form')
	.then(function(response) {
	return response.formData()
	})
	.then(function(form) {
	assert(form instanceof FormData, 'Parsed a FormData object')
	})
	}
	)
	})

	suite('json', function() {
	test('parses json response', function() {
	return fetch('/json')
	.then(function(response) {
	return response.json()
	})
	.then(function(json) {
	assert.equal(json.name, 'Hubot')
	assert.equal(json.login, 'hubot')
	})
	})

	test('rejects json promise after body is consumed', function() {
	return fetch('/json')
	.then(function(response) {
	assert(response.json, 'Body does not implement json')
	assert.equal(response.bodyUsed, false)
	response.text()
	assert.equal(response.bodyUsed, true)
	return response.json()
	})
	.catch(function(error) {
	assert(error instanceof TypeError, 'Promise rejected after body consumed')
	})
	})

	featureDependent(test, !polyfillFirefox, 'handles json parse error', function() {
	return fetch('/json-error')
	.then(function(response) {
	return response.json()
	})
	.catch(function(error) {
	if (!IEorEdge) assert(error instanceof Error, 'JSON exception is an Error instance')
	assert(error.message, 'JSON exception has an error message')
	})
	})
	})

	suite('text', function() {
	test('handles 204 No Content response', function() {
	return fetch('/empty')
	.then(function(response) {
	assert.equal(response.status, 204)
	return response.text()
	})
	.then(function(body) {
	assert.equal(body, '')
	})
	})

	test('resolves text promise', function() {
	return fetch('/hello')
	.then(function(response) {
	return response.text()
	})
	.then(function(text) {
	assert.equal(text, 'hi')
	})
	})

	test('rejects text promise after body is consumed', function() {
	return fetch('/hello')
	.then(function(response) {
	assert(response.text, 'Body does not implement text')
	assert.equal(response.bodyUsed, false)
	response.text()
	assert.equal(response.bodyUsed, true)
	return response.text()
	})
	.catch(function(error) {
	assert(error instanceof TypeError, 'Promise rejected after body consumed')
	})
	})
	})
	})

	suite('fetch method', function() {
	suite('promise resolution', function() {
	test('resolves promise on 500 error', function() {
	return fetch('/boom')
	.then(function(response) {
	assert.equal(response.status, 500)
	assert.equal(response.ok, false)
	return response.text()
	})
	.then(function(body) {
	assert.equal(body, 'boom')
	})
	})

	test.skip('rejects promise for network error', function() {
	return fetch('/error')
	.then(function(response) {
	assert(false, 'HTTP status ' + response.status + ' was treated as success')
	})
	.catch(function(error) {
	assert(error instanceof TypeError, 'Rejected with Error')
	})
	})

	test('rejects when Request constructor throws', function() {
	return fetch('/request', {method: 'GET', body: 'invalid'})
	.then(function() {
	assert(false, 'Invalid Request init was accepted')
	})
	.catch(function(error) {
	assert(error instanceof TypeError, 'Rejected with Error')
	})
	})
	})

	suite('request', function() {
	test('sends headers', function() {
	return fetch('/request', {
	headers: {
	Accept: 'application/json',
	'X-Test': '42'
	}
	})
	.then(function(response) {
	return response.json()
	})
	.then(function(json) {
	assert.equal(json.headers['accept'], 'application/json')
	assert.equal(json.headers['x-test'], '42')
	})
	})

	test('with Request as argument', function() {
	var request = new Request('/request', {
	headers: {
	Accept: 'application/json',
	'X-Test': '42'
	}
	})

	return fetch(request)
	.then(function(response) {
	return response.json()
	})
	.then(function(json) {
	assert.equal(json.headers['accept'], 'application/json')
	assert.equal(json.headers['x-test'], '42')
	})
	})

	test('reusing same Request multiple times', function() {
	var request = new Request('/request', {
	headers: {
	Accept: 'application/json',
	'X-Test': '42'
	}
	})

	var responses = []

	return fetch(request)
	.then(function(response) {
	responses.push(response)
	return fetch(request)
	})
	.then(function(response) {
	responses.push(response)
	return fetch(request)
	})
	.then(function(response) {
	responses.push(response)
	return Promise.all(
	responses.map(function(r) {
	return r.json()
	})
	)
	})
	.then(function(jsons) {
	jsons.forEach(function(json) {
	assert.equal(json.headers['accept'], 'application/json')
	assert.equal(json.headers['x-test'], '42')
	})
	})
	})

	featureDependent(suite, support.arrayBuffer, 'ArrayBuffer', function() {
	test('ArrayBuffer body', function() {
	return fetch('/request', {
	method: 'post',
	body: arrayBufferFromText('name=Hubot')
	})
	.then(function(response) {
	return response.json()
	})
	.then(function(request) {
	assert.equal(request.method, 'POST')
	assert.equal(request.data, 'name=Hubot')
	})
	})

	test('DataView body', function() {
	return fetch('/request', {
	method: 'post',
	body: new DataView(arrayBufferFromText('name=Hubot'))
	})
	.then(function(response) {
	return response.json()
	})
	.then(function(request) {
	assert.equal(request.method, 'POST')
	assert.equal(request.data, 'name=Hubot')
	})
	})

	test('TypedArray body', function() {
	return fetch('/request', {
	method: 'post',
	body: new Uint8Array(arrayBufferFromText('name=Hubot'))
	})
	.then(function(response) {
	return response.json()
	})
	.then(function(request) {
	assert.equal(request.method, 'POST')
	assert.equal(request.data, 'name=Hubot')
	})
	})
	})

	featureDependent(test, !IEorEdge, 'sends URLSearchParams body', function() {
	return fetch('/request', {
	method: 'post',
	body: new URLSearchParams('a=1&b=2')
	})
	.then(function(response) {
	return response.json()
	})
	.then(function(request) {
	assert.equal(request.method, 'POST')
	assert.equal(request.data, 'a=1&b=2')
	})
	})
	})

	featureDependent(suite, exerciseMode !== 'native' \|\| support.aborting, 'aborting', function() {
	test('Request init creates an AbortSignal without option', function() {
	var request = new Request('/request')
	assert.ok(request.signal);
	assert.equal(request.signal.aborted, false);
	})

	test('Request init passes AbortSignal from option', function () {
	var controller = new AbortController()
	var request = new Request('/request', {signal: controller.signal})
	assert.ok(request.signal);
	assert.deepEqual(controller.signal, request.signal);
	})

	test('initially aborted signal', function () {
	var controller = new AbortController()
	controller.abort()

	return fetch('/request', {
	signal: controller.signal
	}).then(
	function() {
	assert.ok(false)
	},
	function(error) {
	if (!IEorEdge) assert.instanceOf(error, WHATWGFetch.DOMException)
	assert.equal(error.name, 'AbortError')
	}
	)
	})

	test('initially aborted signal within Request', function() {
	var controller = new AbortController()
	controller.abort()

	var request = new Request('/request', {signal: controller.signal})

	return fetch(request).then(
	function() {
	assert.ok(false)
	},
	function(error) {
	assert.equal(error.name, 'AbortError')
	}
	)
	})

	test('mid-request', function() {
	var controller = new AbortController()

	setTimeout(function() {
	controller.abort()
	}, 30)

	return fetch('/slow?_=' + new Date().getTime(), {
	signal: controller.signal
	}).then(
	function() {
	assert.ok(false)
	},
	function(error) {
	assert.equal(error.name, 'AbortError')
	}
	)
	})

	test('mid-request within Request', function() {
	var controller = new AbortController()
	var request = new Request('/slow?_=' + new Date().getTime(), {signal: controller.signal})

	setTimeout(function() {
	controller.abort()
	}, 30)

	return fetch(request).then(
	function() {
	assert.ok(false)
	},
	function(error) {
	assert.equal(error.name, 'AbortError')
	}
	)
	})

	test('abort multiple with same signal', function() {
	var controller = new AbortController()

	setTimeout(function() {
	controller.abort()
	}, 30)

	return Promise.all([
	fetch('/slow?_=' + new Date().getTime(), {
	signal: controller.signal
	}).then(
	function() {
	assert.ok(false)
	},
	function(error) {
	assert.equal(error.name, 'AbortError')
	}
	),
	fetch('/slow?_=' + new Date().getTime(), {
	signal: controller.signal
	}).then(
	function() {
	assert.ok(false)
	},
	function(error) {
	assert.equal(error.name, 'AbortError')
	}
	)
	])
	})
	})

	suite('response', function() {
	test('populates body', function() {
	return fetch('/hello')
	.then(function(response) {
	assert.equal(response.status, 200)
	assert.equal(response.ok, true)
	return response.text()
	})
	.then(function(body) {
	assert.equal(body, 'hi')
	})
	})

	test('parses headers', function() {
	return fetch('/headers?' + new Date().getTime()).then(function(response) {
	assert.equal(response.headers.get('Date'), 'Mon, 13 Oct 2014 21:02:27 GMT')
	assert.equal(response.headers.get('Content-Type'), 'text/html; charset=utf-8')
	})
	})
	})

	// https://fetch.spec.whatwg.org/#methods
	suite('HTTP methods', function() {
	test('supports HTTP GET', function() {
	return fetch('/request', {
	method: 'get'
	})
	.then(function(response) {
	return response.json()
	})
	.then(function(request) {
	assert.equal(request.method, 'GET')
	assert.equal(request.data, '')
	})
	})

	test('GET with body throws TypeError', function() {
	assert.throw(function() {
	new Request('', {
	method: 'get',
	body: 'invalid'
	})
	}, TypeError)
	})

	test('HEAD with body throws TypeError', function() {
	assert.throw(function() {
	new Request('', {
	method: 'head',
	body: 'invalid'
	})
	}, TypeError)
	})

	test('supports HTTP POST', function() {
	return fetch('/request', {
	method: 'post',
	body: 'name=Hubot'
	})
	.then(function(response) {
	return response.json()
	})
	.then(function(request) {
	assert.equal(request.method, 'POST')
	assert.equal(request.data, 'name=Hubot')
	})
	})

	test('supports HTTP PUT', function() {
	return fetch('/request', {
	method: 'put',
	body: 'name=Hubot'
	})
	.then(function(response) {
	return response.json()
	})
	.then(function(request) {
	assert.equal(request.method, 'PUT')
	assert.equal(request.data, 'name=Hubot')
	})
	})

	test('supports HTTP PATCH', function() {
	return fetch('/request', {
	method: 'PATCH',
	body: 'name=Hubot'
	})
	.then(function(response) {
	return response.json()
	})
	.then(function(request) {
	assert.equal(request.method, 'PATCH')
	assert.equal(request.data, 'name=Hubot')
	})
	})

	test('supports HTTP DELETE', function() {
	return fetch('/request', {
	method: 'delete'
	})
	.then(function(response) {
	return response.json()
	})
	.then(function(request) {
	assert.equal(request.method, 'DELETE')
	assert.equal(request.data, '')
	})
	})
	})

	// https://fetch.spec.whatwg.org/#atomic-http-redirect-handling
	suite('Atomic HTTP redirect handling', function() {
	test('handles 301 redirect response', function() {
	return fetch('/redirect/301')
	.then(function(response) {
	assert.equal(response.status, 200)
	assert.equal(response.ok, true)
	assert.match(response.url, /\/hello/)
	return response.text()
	})
	.then(function(body) {
	assert.equal(body, 'hi')
	})
	})

	test('handles 302 redirect response', function() {
	return fetch('/redirect/302')
	.then(function(response) {
	assert.equal(response.status, 200)
	assert.equal(response.ok, true)
	assert.match(response.url, /\/hello/)
	return response.text()
	})
	.then(function(body) {
	assert.equal(body, 'hi')
	})
	})

	test('handles 303 redirect response', function() {
	return fetch('/redirect/303')
	.then(function(response) {
	assert.equal(response.status, 200)
	assert.equal(response.ok, true)
	assert.match(response.url, /\/hello/)
	return response.text()
	})
	.then(function(body) {
	assert.equal(body, 'hi')
	})
	})

	test('handles 307 redirect response', function() {
	return fetch('/redirect/307')
	.then(function(response) {
	assert.equal(response.status, 200)
	assert.equal(response.ok, true)
	assert.match(response.url, /\/hello/)
	return response.text()
	})
	.then(function(body) {
	assert.equal(body, 'hi')
	})
	})

	featureDependent(test, support.permanentRedirect, 'handles 308 redirect response', function() {
	return fetch('/redirect/308')
	.then(function(response) {
	assert.equal(response.status, 200)
	assert.equal(response.ok, true)
	assert.match(response.url, /\/hello/)
	return response.text()
	})
	.then(function(body) {
	assert.equal(body, 'hi')
	})
	})
	})

	// https://fetch.spec.whatwg.org/#concept-request-credentials-mode
	suite('credentials mode', function() {
	setup(function() {
	return fetch('/cookie?name=foo&value=reset', {credentials: 'same-origin'})
	})

	featureDependent(suite, exerciseMode === 'native', 'omit', function() {
	test('does not accept cookies with omit credentials', function() {
	return fetch('/cookie?name=foo&value=bar', {credentials: 'omit'})
	.then(function() {
	return fetch('/cookie?name=foo', {credentials: 'same-origin'})
	})
	.then(function(response) {
	return response.text()
	})
	.then(function(data) {
	assert.equal(data, 'reset')
	})
	})

	test('does not send cookies with omit credentials', function() {
	return fetch('/cookie?name=foo&value=bar')
	.then(function() {
	return fetch('/cookie?name=foo', {credentials: 'omit'})
	})
	.then(function(response) {
	return response.text()
	})
	.then(function(data) {
	assert.equal(data, '')
	})
	})
	})

	suite('same-origin', function() {
	test('send cookies with same-origin credentials', function() {
	return fetch('/cookie?name=foo&value=bar', {credentials: 'same-origin'})
	.then(function() {
	return fetch('/cookie?name=foo', {credentials: 'same-origin'})
	})
	.then(function(response) {
	return response.text()
	})
	.then(function(data) {
	assert.equal(data, 'bar')
	})
	})
	})

	suite('include', function() {
	test('send cookies with include credentials', function() {
	return fetch('/cookie?name=foo&value=bar', {credentials: 'include'})
	.then(function() {
	return fetch('/cookie?name=foo', {credentials: 'include'})
	})
	.then(function(response) {
	return response.text()
	})
	.then(function(data) {
	assert.equal(data, 'bar')
	})
	})
	})
	})
	})
	})
	})