session-ios/SignalServiceKit/tests/Messages/OWSLinkPreviewTest.swift
2019-04-22 16:37:56 -04:00

583 lines
29 KiB
Swift

//
// Copyright (c) 2019 Open Whisper Systems. All rights reserved.
//
import Foundation
@testable import SignalServiceKit
import XCTest
func XCTAssertMatch(expectedPattern: String, actualText: String, file: StaticString = #file, line: UInt = #line) {
let regex = try! NSRegularExpression(pattern: expectedPattern, options: [])
XCTAssert(regex.hasMatch(input: actualText), "\(actualText) did not match pattern \(expectedPattern)", file: file, line: line)
}
class OWSLinkPreviewTest: SSKBaseTestSwift {
override func setUp() {
super.setUp()
// Put setup code here. This method is called before the invocation of each test method in the class.
}
override func tearDown() {
// Put teardown code here. This method is called after the invocation of each test method in the class.
super.tearDown()
}
func testBuildValidatedLinkPreview_TitleAndImage() {
let url = "https://www.youtube.com/watch?v=tP-Ipsat90c"
let body = "\(url)"
let previewBuilder = SSKProtoDataMessagePreview.builder(url: url)
previewBuilder.setTitle("Some Youtube Video")
let imageAttachmentBuilder = SSKProtoAttachmentPointer.builder(id: 1)
imageAttachmentBuilder.setKey(Randomness.generateRandomBytes(32))
imageAttachmentBuilder.setContentType(OWSMimeTypeImageJpeg)
previewBuilder.setImage(try! imageAttachmentBuilder.build())
let dataBuilder = SSKProtoDataMessage.builder()
dataBuilder.addPreview(try! previewBuilder.build())
self.readWrite { (transaction) in
XCTAssertNotNil(try! OWSLinkPreview.buildValidatedLinkPreview(dataMessage: try! dataBuilder.build(),
body: body,
transaction: transaction))
}
}
func testBuildValidatedLinkPreview_Title() {
let url = "https://www.youtube.com/watch?v=tP-Ipsat90c"
let body = "\(url)"
let previewBuilder = SSKProtoDataMessagePreview.builder(url: url)
previewBuilder.setTitle("Some Youtube Video")
let dataBuilder = SSKProtoDataMessage.builder()
dataBuilder.addPreview(try! previewBuilder.build())
self.readWrite { (transaction) in
XCTAssertNotNil(try! OWSLinkPreview.buildValidatedLinkPreview(dataMessage: try! dataBuilder.build(),
body: body,
transaction: transaction))
}
}
func testBuildValidatedLinkPreview_Image() {
let url = "https://www.youtube.com/watch?v=tP-Ipsat90c"
let body = "\(url)"
let previewBuilder = SSKProtoDataMessagePreview.builder(url: url)
let imageAttachmentBuilder = SSKProtoAttachmentPointer.builder(id: 1)
imageAttachmentBuilder.setKey(Randomness.generateRandomBytes(32))
imageAttachmentBuilder.setContentType(OWSMimeTypeImageJpeg)
previewBuilder.setImage(try! imageAttachmentBuilder.build())
let dataBuilder = SSKProtoDataMessage.builder()
dataBuilder.addPreview(try! previewBuilder.build())
self.readWrite { (transaction) in
XCTAssertNotNil(try! OWSLinkPreview.buildValidatedLinkPreview(dataMessage: try! dataBuilder.build(),
body: body,
transaction: transaction))
}
}
func testBuildValidatedLinkPreview_NoTitleOrImage() {
let url = "https://www.youtube.com/watch?v=tP-Ipsat90c"
let body = "\(url)"
let previewBuilder = SSKProtoDataMessagePreview.builder(url: url)
let dataBuilder = SSKProtoDataMessage.builder()
dataBuilder.addPreview(try! previewBuilder.build())
self.readWrite { (transaction) in
do {
_ = try OWSLinkPreview.buildValidatedLinkPreview(dataMessage: try! dataBuilder.build(),
body: body,
transaction: transaction)
XCTFail("Missing expected error.")
} catch {
// Do nothing.
}
}
}
func testIsValidLinkUrl() {
XCTAssertTrue(OWSLinkPreview.isValidLinkUrl("https://www.youtube.com/watch?v=tP-Ipsat90c"))
XCTAssertTrue(OWSLinkPreview.isValidLinkUrl("https://youtube.com/watch?v=tP-Ipsat90c"))
// Case shouldn't matter.
XCTAssertTrue(OWSLinkPreview.isValidLinkUrl("https://WWW.YOUTUBE.COM/watch?v=tP-Ipsat90c"))
// Don't allow arbitrary subdomains.
XCTAssertFalse(OWSLinkPreview.isValidMediaUrl("https://some.random.subdomain.youtube.com/watch?v=tP-Ipsat90c"))
// Don't allow HTTP, only HTTPS
XCTAssertFalse(OWSLinkPreview.isValidLinkUrl("http://youtube.com/watch?v=tP-Ipsat90c"))
XCTAssertFalse(OWSLinkPreview.isValidLinkUrl("mailto://youtube.com/watch?v=tP-Ipsat90c"))
XCTAssertFalse(OWSLinkPreview.isValidLinkUrl("ftp://youtube.com/watch?v=tP-Ipsat90c"))
// Don't allow similar domains.
XCTAssertFalse(OWSLinkPreview.isValidLinkUrl("https://xyoutube.com/watch?v=tP-Ipsat90c"))
XCTAssertFalse(OWSLinkPreview.isValidLinkUrl("https://youtubex.com/watch?v=tP-Ipsat90c"))
XCTAssertFalse(OWSLinkPreview.isValidLinkUrl("https://youtube.comx/watch?v=tP-Ipsat90c"))
XCTAssertFalse(OWSLinkPreview.isValidLinkUrl("https://www.xyoutube.com/watch?v=tP-Ipsat90c"))
XCTAssertFalse(OWSLinkPreview.isValidLinkUrl("https://www.youtubex.com/watch?v=tP-Ipsat90c"))
XCTAssertFalse(OWSLinkPreview.isValidLinkUrl("https://www.youtube.comx/watch?v=tP-Ipsat90c"))
// Don't allow media domains.
XCTAssertFalse(OWSLinkPreview.isValidLinkUrl("https://i.ytimg.com/vi/tP-Ipsat90c/maxresdefault.jpg"))
// Allow all whitelisted domains.
XCTAssertTrue(OWSLinkPreview.isValidLinkUrl("https://www.youtube.com/watch?v=tP-Ipsat90c"))
XCTAssertTrue(OWSLinkPreview.isValidLinkUrl("https://youtu.be/tP-Ipsat90c"))
XCTAssertTrue(OWSLinkPreview.isValidLinkUrl("https://www.reddit.com/r/androiddev/comments/a7gctz/androidx_release_notes_this_is_the_first_release/"))
XCTAssertTrue(OWSLinkPreview.isValidLinkUrl("https://www.reddit.com/r/WhitePeopleTwitter/comments/a7j3mm/why/"))
XCTAssertTrue(OWSLinkPreview.isValidLinkUrl("https://imgur.com/gallery/KFCL8fm"))
XCTAssertTrue(OWSLinkPreview.isValidLinkUrl("https://imgur.com/gallery/FMdwTiV"))
XCTAssertTrue(OWSLinkPreview.isValidLinkUrl("https://www.instagram.com/p/BrgpsUjF9Jo/?utm_source=ig_web_button_share_sheet"))
XCTAssertTrue(OWSLinkPreview.isValidLinkUrl("https://www.instagram.com/p/BrgpsUjF9Jo/?utm_source=ig_share_sheet&igshid=94c7ihqjfmbm"))
XCTAssertTrue(OWSLinkPreview.isValidLinkUrl("https://imgur.com/gallery/igHOwDM"))
XCTAssertTrue(OWSLinkPreview.isValidLinkUrl("https://pinterest.com/something"))
XCTAssertTrue(OWSLinkPreview.isValidLinkUrl("https://www.pinterest.com/something"))
XCTAssertTrue(OWSLinkPreview.isValidLinkUrl("https://pin.it/something"))
XCTAssertTrue(OWSLinkPreview.isValidLinkUrl("https://www.pinterest.com/ohjoy/recipes/"))
// Strip trailing commas.
XCTAssertTrue(OWSLinkPreview.isValidLinkUrl("https://imgur.com/gallery/igHOwDM,"))
// Ignore URLs with an empty path.
XCTAssertFalse(OWSLinkPreview.isValidLinkUrl("https://imgur.com"))
XCTAssertFalse(OWSLinkPreview.isValidLinkUrl("https://imgur.com/"))
XCTAssertTrue(OWSLinkPreview.isValidLinkUrl("https://imgur.com/X"))
}
func testIsValidMediaUrl() {
// Only allow domains on the media whitelist.
XCTAssertFalse(OWSLinkPreview.isValidMediaUrl("https://www.youtube.com/watch?v=tP-Ipsat90c"))
XCTAssertFalse(OWSLinkPreview.isValidMediaUrl("https://youtube.com/watch?v=tP-Ipsat90c"))
// Allow arbitrary subdomains.
XCTAssertTrue(OWSLinkPreview.isValidMediaUrl("https://ytimg.com/something"))
XCTAssertTrue(OWSLinkPreview.isValidMediaUrl("https://something.ytimg.com/something"))
// Don't allow HTTP, only HTTPS
XCTAssertFalse(OWSLinkPreview.isValidMediaUrl("http://ytimg.com/watch?v=tP-Ipsat90c"))
XCTAssertFalse(OWSLinkPreview.isValidMediaUrl("mailto://ytimg.com/watch?v=tP-Ipsat90c"))
XCTAssertFalse(OWSLinkPreview.isValidMediaUrl("ftp://ytimg.com/watch?v=tP-Ipsat90c"))
// Don't allow similar domains.
XCTAssertFalse(OWSLinkPreview.isValidMediaUrl("https://xytimg.com/watch?v=tP-Ipsat90c"))
XCTAssertFalse(OWSLinkPreview.isValidMediaUrl("https://youtubex.com/watch?v=tP-Ipsat90c"))
XCTAssertFalse(OWSLinkPreview.isValidMediaUrl("https://ytimg.comx/watch?v=tP-Ipsat90c"))
XCTAssertFalse(OWSLinkPreview.isValidMediaUrl("https://www.xytimg.com/watch?v=tP-Ipsat90c"))
XCTAssertFalse(OWSLinkPreview.isValidMediaUrl("https://www.ytimgx.com/watch?v=tP-Ipsat90c"))
XCTAssertFalse(OWSLinkPreview.isValidMediaUrl("https://www.ytimg.comx/watch?v=tP-Ipsat90c"))
// Allow media domains.
XCTAssertTrue(OWSLinkPreview.isValidMediaUrl("https://i.ytimg.com/vi/tP-Ipsat90c/maxresdefault.jpg"))
XCTAssertTrue(OWSLinkPreview.isValidMediaUrl("https://external-preview.redd.it/j5lhdY0huShdzyrbSEdKzOb09BKhNreyEZOLDu1UzBA.jpg?auto=webp&s=2cb8bdb5ac5b54fc9514719030c0c9f08a03f684"))
XCTAssertTrue(OWSLinkPreview.isValidMediaUrl("https://preview.redd.it/ehakvm9vx5521.jpg?auto=webp&s=925fb2d8776ca7102b944ab00e0615ae20c1bd5a"))
XCTAssertTrue(OWSLinkPreview.isValidMediaUrl("https://i.imgur.com/Y3wjlwY.jpg?fb"))
XCTAssertTrue(OWSLinkPreview.isValidMediaUrl("https://i.imgur.com/Vot3iHh.jpg?fbplay"))
XCTAssertTrue(OWSLinkPreview.isValidMediaUrl("https://scontent-mia3-2.cdninstagram.com/vp/9035a7d6b32e6f840856661e4a11e3cf/5CFC285B/t51.2885-15/e35/47690175_2275988962411653_1145978227188801192_n.jpg?_nc_ht=scontent-mia3-2.cdninstagram.com"))
XCTAssertTrue(OWSLinkPreview.isValidMediaUrl("https://scontent-mia3-2.cdninstagram.com/vp/9035a7d6b32e6f840856661e4a11e3cf/5CFC285B/t51.2885-15/e35/47690175_2275988962411653_1145978227188801192_n.jpg?_nc_ht=scontent-mia3-2.cdninstagram.com"))
XCTAssertTrue(OWSLinkPreview.isValidMediaUrl("https://i.imgur.com/PYiyLv1.jpg?fbplay"))
XCTAssertTrue(OWSLinkPreview.isValidMediaUrl("https://pinimg.com/something"))
}
func testPreviewUrlForMessageBodyText() {
Assert(bodyText: "", extractsLink: nil)
Assert(bodyText: "alice bob jim", extractsLink: nil)
Assert(bodyText: "alice bob jim http://", extractsLink: nil)
Assert(bodyText: "alice bob jim http://a.com", extractsLink: nil)
Assert(bodyText: "https://www.youtube.com/watch?v=tP-Ipsat90c",
extractsLink: "https://www.youtube.com/watch?v=tP-Ipsat90c")
Assert(bodyText: "alice bob https://www.youtube.com/watch?v=tP-Ipsat90c jim",
extractsLink: "https://www.youtube.com/watch?v=tP-Ipsat90c")
// If there are more than one, take the first.
Assert(bodyText: "alice bob https://www.youtube.com/watch?v=tP-Ipsat90c jim https://www.youtube.com/watch?v=other-url carol",
extractsLink: "https://www.youtube.com/watch?v=tP-Ipsat90c")
}
func testUtils() {
XCTAssertNil(OWSLinkPreview.fileExtension(forImageUrl: ""))
XCTAssertNil(OWSLinkPreview.fileExtension(forImageUrl: "https://www.some.host/path/imagename"))
XCTAssertNil(OWSLinkPreview.fileExtension(forImageUrl: "https://www.some.host/path/imagename."))
XCTAssertEqual(OWSLinkPreview.fileExtension(forImageUrl: "https://www.some.host/path/imagename.jpg"), "jpg")
XCTAssertEqual(OWSLinkPreview.fileExtension(forImageUrl: "https://www.some.host/path/imagename.gif"), "gif")
XCTAssertEqual(OWSLinkPreview.fileExtension(forImageUrl: "https://www.some.host/path/imagename.png"), "png")
XCTAssertEqual(OWSLinkPreview.fileExtension(forImageUrl: "https://www.some.host/path/imagename.boink"), "boink")
XCTAssertNil(OWSLinkPreview.mimetype(forImageFileExtension: ""))
XCTAssertNil(OWSLinkPreview.mimetype(forImageFileExtension: "boink"))
XCTAssertNil(OWSLinkPreview.mimetype(forImageFileExtension: "tiff"))
XCTAssertNil(OWSLinkPreview.mimetype(forImageFileExtension: "gif"))
XCTAssertEqual(OWSLinkPreview.mimetype(forImageFileExtension: "jpg"), OWSMimeTypeImageJpeg)
XCTAssertEqual(OWSLinkPreview.mimetype(forImageFileExtension: "png"), OWSMimeTypeImagePng)
}
func testLinkDownloadAndParsing() {
let expectation = self.expectation(description: "link download and parsing")
OWSLinkPreview.tryToBuildPreviewInfo(previewUrl: "https://www.youtube.com/watch?v=tP-Ipsat90c")
.done { (draft: OWSLinkPreviewDraft) in
XCTAssertNotNil(draft)
XCTAssertEqual(draft.title, "Randomness is Random - Numberphile")
XCTAssertNotNil(draft.jpegImageData)
expectation.fulfill()
}.catch { (error) in
Logger.error("error: \(error)")
XCTFail("Unexpected error: \(error)")
expectation.fulfill()
}.retainUntilComplete()
self.waitForExpectations(timeout: 5.0, handler: nil)
}
func testLinkDataParsing_Empty() {
let linkText = ""
let linkData = linkText.data(using: .utf8)!
let content = try! OWSLinkPreview.parse(linkData: linkData)
XCTAssertNotNil(content)
XCTAssertNil(content.title)
XCTAssertNil(content.imageUrl)
}
func testLinkDataParsing() {
let linkText = ("<meta property=\"og:title\" content=\"Randomness is Random - Numberphile\">" +
"<meta property=\"og:image\" content=\"https://i.ytimg.com/vi/tP-Ipsat90c/maxresdefault.jpg\">")
let linkData = linkText.data(using: .utf8)!
let content = try! OWSLinkPreview.parse(linkData: linkData)
XCTAssertNotNil(content)
XCTAssertEqual(content.title, "Randomness is Random - Numberphile")
XCTAssertEqual(content.imageUrl, "https://i.ytimg.com/vi/tP-Ipsat90c/maxresdefault.jpg")
}
func testLinkParsingWithRealData1() {
let expectation = self.expectation(description: "link download and parsing")
OWSLinkPreview.downloadLink(url: "https://www.youtube.com/watch?v=tP-Ipsat90c")
.done { (linkData) in
let content = try! OWSLinkPreview.parse(linkData: linkData)
XCTAssertNotNil(content)
XCTAssertEqual(content.title, "Randomness is Random - Numberphile")
XCTAssertEqual(content.imageUrl, "https://i.ytimg.com/vi/tP-Ipsat90c/maxresdefault.jpg")
expectation.fulfill()
}.catch { (error) in
Logger.error("error: \(error)")
XCTFail("Unexpected error: \(error)")
expectation.fulfill()
}.retainUntilComplete()
self.waitForExpectations(timeout: 5.0, handler: nil)
}
func testLinkParsingWithRealData2() {
let expectation = self.expectation(description: "link download and parsing")
OWSLinkPreview.downloadLink(url: "https://youtu.be/tP-Ipsat90c")
.done { (linkData) in
let content = try! OWSLinkPreview.parse(linkData: linkData)
XCTAssertNotNil(content)
XCTAssertEqual(content.title, "Randomness is Random - Numberphile")
XCTAssertEqual(content.imageUrl, "https://i.ytimg.com/vi/tP-Ipsat90c/maxresdefault.jpg")
expectation.fulfill()
}.catch { (error) in
Logger.error("error: \(error)")
XCTFail("Unexpected error: \(error)")
expectation.fulfill()
}.retainUntilComplete()
self.waitForExpectations(timeout: 5.0, handler: nil)
}
func testLinkParsingWithRealData3() {
let expectation = self.expectation(description: "link download and parsing")
OWSLinkPreview.downloadLink(url: "https://www.reddit.com/r/androiddev/comments/a7gctz/androidx_release_notes_this_is_the_first_release/")
.done { (linkData) in
let content = try! OWSLinkPreview.parse(linkData: linkData)
XCTAssertNotNil(content)
XCTAssertEqual(content.title, "r/androiddev - AndroidX release notes | This is the first release of SavedState")
XCTAssertEqual(content.imageUrl, "https://external-preview.redd.it/j5lhdY0huShdzyrbSEdKzOb09BKhNreyEZOLDu1UzBA.jpg?auto=webp&s=2cb8bdb5ac5b54fc9514719030c0c9f08a03f684")
expectation.fulfill()
}.catch { (error) in
Logger.error("error: \(error)")
XCTFail("Unexpected error: \(error)")
expectation.fulfill()
}.retainUntilComplete()
self.waitForExpectations(timeout: 5.0, handler: nil)
}
func testLinkParsingWithRealData4() {
let expectation = self.expectation(description: "link download and parsing")
OWSLinkPreview.downloadLink(url: "https://www.reddit.com/r/WhitePeopleTwitter/comments/a7j3mm/why/")
.done { (linkData) in
let content = try! OWSLinkPreview.parse(linkData: linkData)
XCTAssertNotNil(content)
XCTAssertEqual(content.title, "r/WhitePeopleTwitter - Why")
XCTAssertEqual(content.imageUrl, "https://preview.redd.it/ehakvm9vx5521.jpg?auto=webp&s=925fb2d8776ca7102b944ab00e0615ae20c1bd5a")
expectation.fulfill()
}.catch { (error) in
Logger.error("error: \(error)")
XCTFail("Unexpected error: \(error)")
expectation.fulfill()
}.retainUntilComplete()
self.waitForExpectations(timeout: 5.0, handler: nil)
}
func testLinkParsingWithRealData5() {
let expectation = self.expectation(description: "link download and parsing")
OWSLinkPreview.downloadLink(url: "https://imgur.com/gallery/KFCL8fm")
.done { (linkData) in
let content = try! OWSLinkPreview.parse(linkData: linkData)
XCTAssertNotNil(content)
XCTAssertNil(content.title)
XCTAssertEqual(content.imageUrl, "https://i.imgur.com/Y3wjlwY.jpg?fb")
expectation.fulfill()
}.catch { (error) in
Logger.error("error: \(error)")
XCTFail("Unexpected error: \(error)")
expectation.fulfill()
}.retainUntilComplete()
self.waitForExpectations(timeout: 5.0, handler: nil)
}
func testLinkParsingWithRealData6() {
let expectation = self.expectation(description: "link download and parsing")
OWSLinkPreview.downloadLink(url: "https://imgur.com/gallery/FMdwTiV")
.done { (linkData) in
let content = try! OWSLinkPreview.parse(linkData: linkData)
XCTAssertNotNil(content)
XCTAssertEqual(content.title, "Freddy would be proud!")
XCTAssertEqual(content.imageUrl, "https://i.imgur.com/Vot3iHh.jpg?fbplay")
expectation.fulfill()
}.catch { (error) in
Logger.error("error: \(error)")
XCTFail("Unexpected error: \(error)")
expectation.fulfill()
}.retainUntilComplete()
self.waitForExpectations(timeout: 5.0, handler: nil)
}
func testLinkParsingWithRealData7() {
let expectation = self.expectation(description: "link download and parsing")
OWSLinkPreview.downloadLink(url: "https://www.instagram.com/p/BrgpsUjF9Jo/?utm_source=ig_web_button_share_sheet")
.done { (linkData) in
let content = try! OWSLinkPreview.parse(linkData: linkData)
XCTAssertNotNil(content)
XCTAssertEqual(content.title, "Walter \"MFPallytime\" on Instagram: “Lol gg”")
// Actual URL can change based on network response
// https://scontent-mia3-2.cdninstagram.com/vp/9035a7d6b32e6f840856661e4a11e3cf/5CFC285B/t51.2885-15/e35/47690175_2275988962411653_1145978227188801192_n.jpg?_nc_ht=scontent-mia3-2.cdninstagram.com
// It seems like some parts of the URL are stable, so we can pattern match, but if this continues to be brittle we may choose
// to remove it or stub the network response
XCTAssertMatch(expectedPattern: "^https://.*.cdninstagram.com/.*/47690175_2275988962411653_1145978227188801192_n.jpg\\?.*$",
actualText: content.imageUrl!)
// XCTAssertEqual(content.imageUrl, "https://scontent-mia3-2.cdninstagram.com/vp/9035a7d6b32e6f840856661e4a11e3cf/5CFC285B/t51.2885-15/e35/47690175_2275988962411653_1145978227188801192_n.jpg?_nc_ht=scontent-mia3-2.cdninstagram.com")
expectation.fulfill()
}.catch { (error) in
Logger.error("error: \(error)")
XCTFail("Unexpected error: \(error)")
expectation.fulfill()
}.retainUntilComplete()
self.waitForExpectations(timeout: 5.0, handler: nil)
}
func testLinkParsingWithRealData8() {
let expectation = self.expectation(description: "link download and parsing")
OWSLinkPreview.downloadLink(url: "https://www.instagram.com/p/BrgpsUjF9Jo/?utm_source=ig_share_sheet&igshid=94c7ihqjfmbm")
.done { (linkData) in
let content = try! OWSLinkPreview.parse(linkData: linkData)
XCTAssertNotNil(content)
XCTAssertEqual(content.title, "Walter \"MFPallytime\" on Instagram: “Lol gg”")
// Actual URL can change based on network response
// https://scontent-mia3-2.cdninstagram.com/vp/9035a7d6b32e6f840856661e4a11e3cf/5CFC285B/t51.2885-15/e35/47690175_2275988962411653_1145978227188801192_n.jpg?_nc_ht=scontent-mia3-2.cdninstagram.com
// It seems like some parts of the URL are stable, so we can pattern match, but if this continues to be brittle we may choose
// to remove it or stub the network response
XCTAssertMatch(expectedPattern: "^https://.*.cdninstagram.com/.*/47690175_2275988962411653_1145978227188801192_n.jpg\\?.*$",
actualText: content.imageUrl!)
expectation.fulfill()
}.catch { (error) in
Logger.error("error: \(error)")
XCTFail("Unexpected error: \(error)")
expectation.fulfill()
}.retainUntilComplete()
self.waitForExpectations(timeout: 5.0, handler: nil)
}
func testLinkParsingWithRealData9() {
let expectation = self.expectation(description: "link download and parsing")
OWSLinkPreview.downloadLink(url: "https://imgur.com/gallery/igHOwDM")
.done { (linkData) in
let content = try! OWSLinkPreview.parse(linkData: linkData)
XCTAssertNotNil(content)
XCTAssertEqual(content.title, "Sheet dance")
XCTAssertEqual(content.imageUrl, "https://i.imgur.com/PYiyLv1.jpg?fbplay")
expectation.fulfill()
}.catch { (error) in
Logger.error("error: \(error)")
XCTFail("Unexpected error: \(error)")
expectation.fulfill()
}.retainUntilComplete()
self.waitForExpectations(timeout: 5.0, handler: nil)
}
func testLinkParsingWithRealData10() {
let expectation = self.expectation(description: "link download and parsing")
OWSLinkPreview.downloadLink(url: "https://www.pinterest.com/ohjoy/recipes/")
.done { (linkData) in
let content = try! OWSLinkPreview.parse(linkData: linkData)
XCTAssertNotNil(content)
XCTAssertEqual(content.title, "Recipes")
XCTAssertEqual(content.imageUrl, "https://i.pinimg.com/200x150/76/ae/9d/76ae9d3056dbcb295924fdd5db6951c6.jpg")
expectation.fulfill()
}.catch { (error) in
Logger.error("error: \(error)")
XCTFail("Unexpected error: \(error)")
expectation.fulfill()
}.retainUntilComplete()
self.waitForExpectations(timeout: 5.0, handler: nil)
}
// When using regular expressions to parse link titles, we need to use
// String.utf16.count, not String.count in the range.
func testRegexRanges() {
let regex = try! NSRegularExpression(pattern: "bob", options: [])
var text = "bob"
XCTAssertNotNil(regex.firstMatch(in: text,
options: [],
range: NSRange(location: 0, length: text.count)))
XCTAssertNotNil(regex.firstMatch(in: text,
options: [],
range: NSRange(location: 0, length: text.utf16.count)))
text = "😂😘🙂 bob"
XCTAssertNil(regex.firstMatch(in: text,
options: [],
range: NSRange(location: 0, length: text.count)))
XCTAssertNotNil(regex.firstMatch(in: text,
options: [],
range: NSRange(location: 0, length: text.utf16.count)))
}
func testCursorPositions() {
// sanity check
Assert(bodyText: "https://www.youtube.com/watch?v=testCursorPositionsa",
extractsLink: "https://www.youtube.com/watch?v=testCursorPositionsa",
selectedRange: nil)
// Don't extract link if cursor is touching text
let text2 = "https://www.youtube.com/watch?v=testCursorPositionsb"
XCTAssertEqual(text2.count, 52)
Assert(bodyText: text2,
extractsLink: nil,
selectedRange: NSRange(location: 51, length: 0))
Assert(bodyText: text2,
extractsLink: nil,
selectedRange: NSRange(location: 51, length: 10))
Assert(bodyText: text2,
extractsLink: nil,
selectedRange: NSRange(location: 0, length: 0))
// Unless the cursor is at the end of the text
Assert(bodyText: text2,
extractsLink: "https://www.youtube.com/watch?v=testCursorPositionsb",
selectedRange: NSRange(location: 52, length: 0))
// Once extracted, keep the existing link preview, even if the cursor moves back.
Assert(bodyText: text2,
extractsLink: "https://www.youtube.com/watch?v=testCursorPositionsb",
selectedRange: NSRange(location: 51, length: 0))
let text3 = "foo https://www.youtube.com/watch?v=testCursorPositionsc bar"
XCTAssertEqual(text3.count, 60)
// front edge
Assert(bodyText: text3,
extractsLink: nil,
selectedRange: NSRange(location: 4, length: 0))
// middle
Assert(bodyText: text3,
extractsLink: nil,
selectedRange: NSRange(location: 4, length: 0))
// rear edge
Assert(bodyText: text3,
extractsLink: nil,
selectedRange: NSRange(location: 56, length: 0))
// extract link if selecting after link
Assert(bodyText: text3,
extractsLink: "https://www.youtube.com/watch?v=testCursorPositionsc",
selectedRange: NSRange(location: 57, length: 0))
let text4 = "bar https://www.youtube.com/watch?v=testCursorPositionsd foo"
XCTAssertEqual(text4.count, 60)
// front edge
Assert(bodyText: text4,
extractsLink: nil,
selectedRange: NSRange(location: 4, length: 0))
// middle
Assert(bodyText: text4,
extractsLink: nil,
selectedRange: NSRange(location: 20, length: 0))
// rear edge
Assert(bodyText: text4,
extractsLink: nil,
selectedRange: NSRange(location: 56, length: 0))
// extract link if selecting before link
Assert(bodyText: text4,
extractsLink: "https://www.youtube.com/watch?v=testCursorPositionsd",
selectedRange: NSRange(location: 3, length: 0))
}
private func Assert(bodyText: String, extractsLink link: String?, selectedRange: NSRange? = nil, file: StaticString = #file, line: UInt = #line) {
let actual = OWSLinkPreview.previewUrl(forMessageBodyText: bodyText, selectedRange: selectedRange)
XCTAssertEqual(actual, link, file: file, line: line)
}
}