Path: blob/main/Signal/test/util/BatchUpdateTest.swift
1 views
//
// Copyright 2021 Signal Messenger, LLC
// SPDX-License-Identifier: AGPL-3.0-only
//
import XCTest
@testable import Signal
@testable import SignalServiceKit
class BatchUpdateTest: XCTestCase {
func testScenario1() {
let oldValueIdList = [
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]
let newValueIdList = [
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"6B7DE12A-42E9-4107-8B85-E517044FC916",
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]
let oldValues = oldValueIdList.map { MockValue($0) }
let newValues = newValueIdList.map { MockValue($0) }
let batchUpdateItems = try! BatchUpdate.build(
viewType: .uiTableView,
oldValues: oldValues,
newValues: newValues,
changedValues: [],
)
XCTAssertTrue(!batchUpdateItems.isEmpty)
}
func testScenario2() {
let oldValueIdList = [
"A",
"B",
"C",
"D",
"E",
"F",
]
let newValueIdList = [
"B",
"C",
"D",
"E",
"F",
// The first element becomes last.
"A",
]
let oldValues = oldValueIdList.map { MockValue($0) }
let newValues = newValueIdList.map { MockValue($0) }
do {
let batchUpdateItems = try! BatchUpdate.build(
viewType: .uiTableView,
oldValues: oldValues,
newValues: newValues,
changedValues: [],
)
// A UITableView can move one _unchanged_ item with one .move.
XCTAssertEqual(batchUpdateItems.count, 1)
XCTAssertEqual(batchUpdateItems.insertItems.count, 0)
XCTAssertEqual(batchUpdateItems.deleteItems.count, 0)
XCTAssertEqual(batchUpdateItems.moveItems.count, 1)
XCTAssertEqual(batchUpdateItems.updateItems.count, 0)
}
do {
let batchUpdateItems = try! BatchUpdate.build(
viewType: .uiTableView,
oldValues: oldValues,
newValues: newValues,
changedValues: [MockValue("A")],
)
// A UITableView can move one _changed_ item with one .move.
XCTAssertEqual(batchUpdateItems.count, 1)
XCTAssertEqual(batchUpdateItems.insertItems.count, 0)
XCTAssertEqual(batchUpdateItems.deleteItems.count, 0)
XCTAssertEqual(batchUpdateItems.moveItems.count, 1)
XCTAssertEqual(batchUpdateItems.updateItems.count, 0)
}
do {
let batchUpdateItems = try! BatchUpdate.build(
viewType: .uiCollectionView,
oldValues: oldValues,
newValues: newValues,
changedValues: [],
)
if BatchUpdate<MockValue>.canUseMoveInCollectionView {
// A UICollectionView can move one _unchanged_ item with one .move.
XCTAssertEqual(batchUpdateItems.count, 1)
XCTAssertEqual(batchUpdateItems.insertItems.count, 0)
XCTAssertEqual(batchUpdateItems.deleteItems.count, 0)
XCTAssertEqual(batchUpdateItems.moveItems.count, 1)
XCTAssertEqual(batchUpdateItems.updateItems.count, 0)
} else {
XCTAssertEqual(batchUpdateItems.count, 2)
XCTAssertEqual(batchUpdateItems.insertItems.count, 1)
XCTAssertEqual(batchUpdateItems.deleteItems.count, 1)
XCTAssertEqual(batchUpdateItems.moveItems.count, 0)
XCTAssertEqual(batchUpdateItems.updateItems.count, 0)
}
}
do {
let batchUpdateItems = try! BatchUpdate.build(
viewType: .uiCollectionView,
oldValues: oldValues,
newValues: newValues,
changedValues: [MockValue("A")],
)
// A UICollectionView can move one _changed_ item with
// one .delete and one .move.
XCTAssertEqual(batchUpdateItems.count, 2)
XCTAssertEqual(batchUpdateItems.insertItems.count, 1)
XCTAssertEqual(batchUpdateItems.deleteItems.count, 1)
XCTAssertEqual(batchUpdateItems.moveItems.count, 0)
XCTAssertEqual(batchUpdateItems.updateItems.count, 0)
}
}
func testScenario3() {
let oldValueIdList = [
"A",
"B",
"C",
"D",
"E",
"F",
]
let newValueIdList = [
// The last element becomes first.
"F",
"A",
"B",
"C",
"D",
"E",
]
let oldValues = oldValueIdList.map { MockValue($0) }
let newValues = newValueIdList.map { MockValue($0) }
do {
let batchUpdateItems = try! BatchUpdate.build(
viewType: .uiTableView,
oldValues: oldValues,
newValues: newValues,
changedValues: [],
)
// A UITableView can move one _unchanged_ item with one .move.
XCTAssertEqual(batchUpdateItems.count, 1)
XCTAssertEqual(batchUpdateItems.deleteItems.count, 0)
XCTAssertEqual(batchUpdateItems.insertItems.count, 0)
XCTAssertEqual(batchUpdateItems.moveItems.count, 1)
XCTAssertEqual(batchUpdateItems.updateItems.count, 0)
}
do {
let batchUpdateItems = try! BatchUpdate.build(
viewType: .uiTableView,
oldValues: oldValues,
newValues: newValues,
changedValues: [MockValue("F")],
)
// A UITableView can move one _changed_ item with one .move.
XCTAssertEqual(batchUpdateItems.count, 1)
XCTAssertEqual(batchUpdateItems.deleteItems.count, 0)
XCTAssertEqual(batchUpdateItems.insertItems.count, 0)
XCTAssertEqual(batchUpdateItems.moveItems.count, 1)
XCTAssertEqual(batchUpdateItems.updateItems.count, 0)
}
do {
let batchUpdateItems = try! BatchUpdate.build(
viewType: .uiCollectionView,
oldValues: oldValues,
newValues: newValues,
changedValues: [],
)
if BatchUpdate<MockValue>.canUseMoveInCollectionView {
// A UICollectionView can move one _unchanged_ item with one .move.
XCTAssertEqual(batchUpdateItems.count, 1)
XCTAssertEqual(batchUpdateItems.deleteItems.count, 0)
XCTAssertEqual(batchUpdateItems.insertItems.count, 0)
XCTAssertEqual(batchUpdateItems.moveItems.count, 1)
XCTAssertEqual(batchUpdateItems.updateItems.count, 0)
} else {
XCTAssertEqual(batchUpdateItems.count, 2)
XCTAssertEqual(batchUpdateItems.deleteItems.count, 1)
XCTAssertEqual(batchUpdateItems.insertItems.count, 1)
XCTAssertEqual(batchUpdateItems.moveItems.count, 0)
XCTAssertEqual(batchUpdateItems.updateItems.count, 0)
}
}
do {
let batchUpdateItems = try! BatchUpdate.build(
viewType: .uiCollectionView,
oldValues: oldValues,
newValues: newValues,
changedValues: [MockValue("F")],
)
// A UICollectionView can move one _changed_ item with
// one .delete and one .insert.
XCTAssertEqual(batchUpdateItems.count, 2)
XCTAssertEqual(batchUpdateItems.deleteItems.count, 1)
XCTAssertEqual(batchUpdateItems.insertItems.count, 1)
XCTAssertEqual(batchUpdateItems.moveItems.count, 0)
XCTAssertEqual(batchUpdateItems.updateItems.count, 0)
}
}
func testScenario4() {
let oldValueIdList = [
"A",
"B",
"C",
"D",
"E",
"F",
]
let newValueIdList = [
// The last element becomes first.
"F",
"B",
"C",
"D",
"E",
// The first element becomes last.
"A",
]
let oldValues = oldValueIdList.map { MockValue($0) }
let newValues = newValueIdList.map { MockValue($0) }
do {
let batchUpdateItems = try! BatchUpdate.build(
viewType: .uiTableView,
oldValues: oldValues,
newValues: newValues,
changedValues: [],
)
// A UITableView can move two _unchanged_ items with two .moves.
XCTAssertEqual(batchUpdateItems.count, 2)
XCTAssertEqual(batchUpdateItems.deleteItems.count, 0)
XCTAssertEqual(batchUpdateItems.insertItems.count, 0)
XCTAssertEqual(batchUpdateItems.moveItems.count, 2)
XCTAssertEqual(batchUpdateItems.updateItems.count, 0)
}
do {
let batchUpdateItems = try! BatchUpdate.build(
viewType: .uiTableView,
oldValues: oldValues,
newValues: newValues,
changedValues: [MockValue("A"), MockValue("F")],
)
// A UITableView can move two _changed_ items with two .moves.
XCTAssertEqual(batchUpdateItems.count, 2)
XCTAssertEqual(batchUpdateItems.deleteItems.count, 0)
XCTAssertEqual(batchUpdateItems.insertItems.count, 0)
XCTAssertEqual(batchUpdateItems.moveItems.count, 2)
XCTAssertEqual(batchUpdateItems.updateItems.count, 0)
}
do {
let batchUpdateItems = try! BatchUpdate.build(
viewType: .uiCollectionView,
oldValues: oldValues,
newValues: newValues,
changedValues: [],
)
if BatchUpdate<MockValue>.canUseMoveInCollectionView {
// A UICollectionView can move two _unchanged_ items with two .moves.
XCTAssertEqual(batchUpdateItems.count, 2)
XCTAssertEqual(batchUpdateItems.deleteItems.count, 0)
XCTAssertEqual(batchUpdateItems.insertItems.count, 0)
XCTAssertEqual(batchUpdateItems.moveItems.count, 2)
XCTAssertEqual(batchUpdateItems.updateItems.count, 0)
} else {
XCTAssertEqual(batchUpdateItems.count, 4)
XCTAssertEqual(batchUpdateItems.deleteItems.count, 2)
XCTAssertEqual(batchUpdateItems.insertItems.count, 2)
XCTAssertEqual(batchUpdateItems.moveItems.count, 0)
XCTAssertEqual(batchUpdateItems.updateItems.count, 0)
}
}
do {
let batchUpdateItems = try! BatchUpdate.build(
viewType: .uiCollectionView,
oldValues: oldValues,
newValues: newValues,
changedValues: [MockValue("A"), MockValue("F")],
)
// A UICollectionView can move two _changed_ items with
// two .deletes and two .inserts.
XCTAssertEqual(batchUpdateItems.count, 4)
XCTAssertEqual(batchUpdateItems.deleteItems.count, 2)
XCTAssertEqual(batchUpdateItems.insertItems.count, 2)
XCTAssertEqual(batchUpdateItems.moveItems.count, 0)
XCTAssertEqual(batchUpdateItems.updateItems.count, 0)
}
}
func testScenario5() {
let oldValueIdList = [
"A",
"B",
"C",
"D",
"E",
"F",
"G",
"H",
"I",
"J",
"K",
]
// Three items move.
let newValueIdList = [
"A",
// This value moves way up.
"J",
"B",
"D",
// This value swaps places with an adjacent neighbor.
"F",
// This value swaps places with an adjacent neighbor.
"E",
"G",
"H",
// This value moves way down.
"C",
"I",
"K",
]
let oldValues = oldValueIdList.map { MockValue($0) }
let newValues = newValueIdList.map { MockValue($0) }
do {
let batchUpdateItems = try! BatchUpdate.build(
viewType: .uiTableView,
oldValues: oldValues,
newValues: newValues,
changedValues: [
// Three items change, one of which moves.
MockValue("A"),
MockValue("B"),
MockValue("C"),
],
)
XCTAssertEqual(batchUpdateItems.count, 5)
XCTAssertEqual(batchUpdateItems.deleteItems.count, 0)
XCTAssertEqual(batchUpdateItems.insertItems.count, 0)
XCTAssertEqual(batchUpdateItems.moveItems.count, 3)
XCTAssertEqual(batchUpdateItems.updateItems.count, 2)
}
do {
let batchUpdateItems = try! BatchUpdate.build(
viewType: .uiCollectionView,
oldValues: oldValues,
newValues: newValues,
changedValues: [
// Three items change, one of which moves.
MockValue("A"),
MockValue("B"),
MockValue("C"),
],
)
if BatchUpdate<MockValue>.canUseMoveInCollectionView {
XCTAssertEqual(batchUpdateItems.count, 6)
XCTAssertEqual(batchUpdateItems.deleteItems.count, 1)
XCTAssertEqual(batchUpdateItems.insertItems.count, 1)
XCTAssertEqual(batchUpdateItems.moveItems.count, 2)
XCTAssertEqual(batchUpdateItems.updateItems.count, 2)
} else {
XCTAssertEqual(batchUpdateItems.count, 8)
XCTAssertEqual(batchUpdateItems.deleteItems.count, 3)
XCTAssertEqual(batchUpdateItems.insertItems.count, 3)
XCTAssertEqual(batchUpdateItems.moveItems.count, 0)
XCTAssertEqual(batchUpdateItems.updateItems.count, 2)
}
}
}
func testScenario6() {
let oldValueIdList = [
"A",
"B",
"C",
"D",
"E",
"F",
"G",
]
// The ordering is reversed.
let newValueIdList = [
"G",
"F",
"E",
"D",
"C",
"B",
"A",
]
let oldValues = oldValueIdList.map { MockValue($0) }
let newValues = newValueIdList.map { MockValue($0) }
do {
let batchUpdateItems = try! BatchUpdate.build(
viewType: .uiTableView,
oldValues: oldValues,
newValues: newValues,
changedValues: [
// All items change.
MockValue("A"),
MockValue("B"),
MockValue("C"),
MockValue("D"),
MockValue("E"),
MockValue("F"),
MockValue("G"),
],
)
XCTAssertEqual(batchUpdateItems.count, 7)
XCTAssertEqual(batchUpdateItems.deleteItems.count, 0)
XCTAssertEqual(batchUpdateItems.insertItems.count, 0)
XCTAssertEqual(batchUpdateItems.moveItems.count, 6)
XCTAssertEqual(batchUpdateItems.updateItems.count, 1)
}
do {
let batchUpdateItems = try! BatchUpdate.build(
viewType: .uiCollectionView,
oldValues: oldValues,
newValues: newValues,
changedValues: [
// All items change.
MockValue("A"),
MockValue("B"),
MockValue("C"),
MockValue("D"),
MockValue("E"),
MockValue("F"),
MockValue("G"),
],
)
XCTAssertEqual(batchUpdateItems.count, 13)
XCTAssertEqual(batchUpdateItems.deleteItems.count, 6)
XCTAssertEqual(batchUpdateItems.insertItems.count, 6)
XCTAssertEqual(batchUpdateItems.moveItems.count, 0)
XCTAssertEqual(batchUpdateItems.updateItems.count, 1)
}
}
typealias MockValue = BatchUpdateMockValue
}
// MARK: -
struct BatchUpdateMockValue: BatchUpdateValue {
let itemId: String
init(_ itemId: String) {
self.itemId = itemId
}
var batchUpdateId: String { itemId }
}
// MARK: -
extension BatchUpdateType {
var isDelete: Bool {
guard case .delete = self else {
return false
}
return true
}
var isInsert: Bool {
guard case .insert = self else {
return false
}
return true
}
var isMove: Bool {
guard case .move = self else {
return false
}
return true
}
var isUpdate: Bool {
guard case .update = self else {
return false
}
return true
}
}
// MARK: -
typealias BatchUpdateMockItem = BatchUpdate<BatchUpdateMockValue>.Item
extension BatchUpdateMockItem {
var isDelete: Bool { updateType.isDelete }
var isInsert: Bool { updateType.isInsert }
var isMove: Bool { updateType.isMove }
var isUpdate: Bool { updateType.isUpdate }
}
// MARK: -
extension Array where Element == BatchUpdateMockItem {
var deleteItems: [BatchUpdateMockItem] { self.filter { $0.isDelete } }
var insertItems: [BatchUpdateMockItem] { self.filter { $0.isInsert } }
var moveItems: [BatchUpdateMockItem] { self.filter { $0.isMove } }
var updateItems: [BatchUpdateMockItem] { self.filter { $0.isUpdate } }
}