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TestIndexSet.swift
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// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2016 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See http://swift.org/LICENSE.txt for license information
// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
class TestIndexSet : XCTestCase {
func test_BasicConstruction() {
let set = IndexSet()
let set2 = IndexSet(integersIn: 4..<11)
XCTAssertEqual(set.count, 0)
XCTAssertEqual(set.first, nil)
XCTAssertEqual(set.last, nil)
XCTAssertEqual(set2.count, 7)
XCTAssertEqual(set2.first, 4)
XCTAssertEqual(set2.last, 10)
let set3 = NSMutableIndexSet()
set3.add(2)
set3.add(5)
set3.add(in: NSRange(location: 4, length: 7))
set3.add(8)
XCTAssertEqual(set3.count, 8)
XCTAssertEqual(set3.firstIndex, 2)
XCTAssertEqual(set3.lastIndex, 10)
}
func test_copy() {
let range: NSRange = NSRange(location: 3, length: 4)
let array : [Int] = [1,2,3,4,5,6,7,8,9,10]
let indexSet = NSMutableIndexSet()
for index in array {
indexSet.add(index)
}
//Test copy operation of NSIndexSet case which is immutable
let selfIndexSet: NSIndexSet = NSIndexSet(indexesIn: range)
let selfIndexSetCopy = selfIndexSet.copy() as! NSIndexSet
XCTAssertTrue(selfIndexSetCopy === selfIndexSet)
XCTAssertTrue(selfIndexSetCopy.isEqual(to: selfIndexSet._bridgeToSwift()))
//Test copy operation of NSMutableIndexSet case
let mutableIndexSet: NSIndexSet = indexSet
indexSet.add(11)
let mutableIndexSetCopy = mutableIndexSet.copy() as! NSIndexSet
XCTAssertFalse(mutableIndexSetCopy === mutableIndexSet)
XCTAssertTrue(mutableIndexSetCopy.isEqual(to: mutableIndexSet._bridgeToSwift()))
}
func test_enumeration() {
let set = IndexSet(integersIn: 4..<11)
var result = Array<Int>()
for idx in set {
result.append(idx)
}
XCTAssertEqual(result, [4, 5, 6, 7, 8, 9, 10])
result = Array<Int>()
for idx in IndexSet() {
result.append(idx)
}
XCTAssertEqual(result, [])
let disjointSet = NSMutableIndexSet()
disjointSet.add(2)
disjointSet.add(5)
disjointSet.add(8)
disjointSet.add(in: NSRange(location: 7, length: 3))
disjointSet.add(11)
disjointSet.add(in: NSRange(location: 13, length: 2))
result = Array<Int>()
disjointSet.enumerate(options: []) { (idx, _) in
result.append(idx)
}
XCTAssertEqual(result, [2, 5, 7, 8, 9, 11, 13, 14])
}
func test_sequenceType() {
let set = IndexSet(integersIn: 4..<11)
var result = Array<Int>()
for idx in set {
result.append(idx)
}
XCTAssertEqual(result, [4, 5, 6, 7, 8, 9, 10])
}
func test_removal() {
var removalSet = NSMutableIndexSet(indexesIn: NSRange(location: 0, length: 10))
removalSet.remove(0)
removalSet.remove(in: NSRange(location: 9, length: 5))
removalSet.remove(in: NSRange(location: 2, length: 4))
XCTAssertEqual(removalSet.count, 4)
XCTAssertEqual(removalSet.firstIndex, 1)
XCTAssertEqual(removalSet.lastIndex, 8)
var expected = IndexSet()
expected.insert(1)
expected.insert(integersIn: 6..<9)
XCTAssertTrue(removalSet.isEqual(to: expected))
// Removing a non-existent element has no effect
removalSet.remove(9)
XCTAssertTrue(removalSet.isEqual(to: expected))
removalSet.removeAllIndexes()
expected = IndexSet()
XCTAssertTrue(removalSet.isEqual(to: expected))
// Set removal
removalSet = NSMutableIndexSet(indexesIn: NSRange(location: 0, length: 10))
removalSet.remove(IndexSet(integersIn: 8..<11))
removalSet.remove(IndexSet(integersIn: 0..<2))
removalSet.remove(IndexSet(integersIn: 4..<6))
XCTAssertEqual(removalSet.count, 4)
XCTAssertEqual(removalSet.firstIndex, 2)
XCTAssertEqual(removalSet.lastIndex, 7)
expected = IndexSet()
expected.insert(integersIn: 2..<4)
expected.insert(integersIn: 6..<8)
XCTAssertTrue(removalSet.isEqual(to: expected))
// Removing an empty set has no effect
removalSet.remove(IndexSet())
XCTAssertTrue(removalSet.isEqual(to: expected))
// Removing non-existent elements has no effect
removalSet.remove(IndexSet(integersIn: 0..<2))
XCTAssertTrue(removalSet.isEqual(to: expected))
}
func test_addition() {
let testSetA = NSMutableIndexSet(index: 0)
testSetA.add(5)
testSetA.add(6)
testSetA.add(7)
testSetA.add(8)
testSetA.add(42)
let testInputA1 = [0,5,6,7,8,42]
var i = 0
if testInputA1.count == testSetA.count {
testSetA.enumerate(options: []) { (idx, _) in
XCTAssertEqual(idx, testInputA1[i])
i += 1
}
}
else {
XCTFail("IndexSet does not contain correct number of indexes")
}
let testInputA2 = [NSRange(location: 0, length: 1),NSRange(location: 5, length: 4),NSRange(location: 42, length: 1)]
i = 0
testSetA.enumerateRanges(options: []) { (range, _) in
let testRange = testInputA2[i]
XCTAssertEqual(range.location, testRange.location)
XCTAssertEqual(range.length, testRange.length)
i += 1
}
let testSetB = NSMutableIndexSet(indexesIn: NSRange(location: 0, length: 5))
testSetB.add(in: NSRange(location: 42, length: 3))
testSetB.add(in: NSRange(location: 2, length: 2))
testSetB.add(in: NSRange(location: 18, length: 1))
let testInputB1 = [0,1,2,3,4,18,42,43,44]
i = 0
if testInputB1.count == testSetB.count {
testSetB.enumerate(options: []) { (idx, _) in
XCTAssertEqual(idx, testInputB1[i])
i += 1
}
}
else {
XCTFail("IndexSet does not contain correct number of indexes")
}
let testInputB2 = [NSRange(location: 0, length: 5),NSRange(location: 18, length: 1),NSRange(location: 42, length: 3)]
i = 0
testSetB.enumerateRanges(options: []) { (range, _) in
let testRange = testInputB2[i]
XCTAssertEqual(range.location, testRange.location)
XCTAssertEqual(range.length, testRange.length)
i += 1
}
}
func test_setAlgebra() {
var is1, is2, expected: IndexSet
do {
is1 = IndexSet(integersIn: 0..<5)
is2 = IndexSet(integersIn: 3..<10)
expected = IndexSet(integersIn: 0..<3)
expected.insert(integersIn: 5..<10)
XCTAssertTrue(expected == is1.symmetricDifference(is2))
XCTAssertTrue(expected == is2.symmetricDifference(is1))
}
do {
is1 = IndexSet([0, 2])
is2 = IndexSet([0, 1, 2])
XCTAssertTrue(IndexSet(integer: 1) == is1.symmetricDifference(is2))
}
do {
is1 = IndexSet(integersIn: 0..<5)
is2 = IndexSet(integersIn: 4..<10)
expected = IndexSet(integer: 4)
XCTAssertTrue(expected == is1.intersection(is2))
XCTAssertTrue(expected == is2.intersection(is1))
}
do {
is1 = IndexSet([0, 2])
is2 = IndexSet([0, 1, 2])
XCTAssertTrue(is1 == is1.intersection(is2))
}
}
func testEnumeration() {
let someIndexes = IndexSet(integersIn: 3...4)
let first = someIndexes.startIndex
let last = someIndexes.endIndex
XCTAssertNotEqual(first, last)
var count = 0
var firstValue = 0
var secondValue = 0
for v in someIndexes {
if count == 0 { firstValue = v }
if count == 1 { secondValue = v }
count += 1
}
XCTAssertEqual(2, count)
XCTAssertEqual(3, firstValue)
XCTAssertEqual(4, secondValue)
}
func testSubsequence() {
var someIndexes = IndexSet(integersIn: 1..<3)
someIndexes.insert(integersIn: 10..<20)
let intersectingRange = someIndexes.indexRange(in: 5..<21)
XCTAssertFalse(intersectingRange.isEmpty)
let sub = someIndexes[intersectingRange]
var count = 0
for i in sub {
if count == 0 {
XCTAssertEqual(10, i)
}
if count == 9 {
XCTAssertEqual(19, i)
}
count += 1
}
XCTAssertEqual(count, 10)
}
func testIndexRange() {
var someIndexes = IndexSet(integersIn: 1..<3)
someIndexes.insert(integersIn: 10..<20)
var r : Range<IndexSet.Index>
r = someIndexes.indexRange(in: 1..<3)
XCTAssertEqual(1, someIndexes[r.lowerBound])
XCTAssertEqual(10, someIndexes[r.upperBound])
r = someIndexes.indexRange(in: 0..<0)
XCTAssertEqual(r.lowerBound, r.upperBound)
r = someIndexes.indexRange(in: 100..<201)
XCTAssertEqual(r.lowerBound, r.upperBound)
XCTAssertTrue(r.isEmpty)
r = someIndexes.indexRange(in: 0..<100)
XCTAssertEqual(r.lowerBound, someIndexes.startIndex)
XCTAssertEqual(r.upperBound, someIndexes.endIndex)
r = someIndexes.indexRange(in: 1..<11)
XCTAssertEqual(1, someIndexes[r.lowerBound])
XCTAssertEqual(11, someIndexes[r.upperBound])
let empty = IndexSet()
XCTAssertTrue(empty.indexRange(in: 1..<3).isEmpty)
}
func testMutation() {
var someIndexes = IndexSet(integersIn: 1..<3)
someIndexes.insert(3)
someIndexes.insert(4)
someIndexes.insert(5)
someIndexes.insert(10)
someIndexes.insert(11)
XCTAssertEqual(someIndexes.count, 7)
someIndexes.remove(11)
XCTAssertEqual(someIndexes.count, 6)
someIndexes.insert(integersIn: 100...101)
XCTAssertEqual(8, someIndexes.count)
XCTAssertEqual(2, someIndexes.count(in: 100...101))
someIndexes.remove(integersIn: 100...101)
XCTAssertEqual(6, someIndexes.count)
XCTAssertEqual(0, someIndexes.count(in: 100...101))
someIndexes.insert(integersIn: 200..<202)
XCTAssertEqual(8, someIndexes.count)
XCTAssertEqual(2, someIndexes.count(in: 200..<202))
someIndexes.remove(integersIn: 200..<202)
XCTAssertEqual(6, someIndexes.count)
XCTAssertEqual(0, someIndexes.count(in: 200..<202))
}
func testContainsAndIntersects() {
let someIndexes = IndexSet(integersIn: 1..<10)
XCTAssertTrue(someIndexes.contains(integersIn: 1..<10))
XCTAssertTrue(someIndexes.contains(integersIn: 1...9))
XCTAssertTrue(someIndexes.contains(integersIn: 2..<10))
XCTAssertTrue(someIndexes.contains(integersIn: 2...9))
XCTAssertTrue(someIndexes.contains(integersIn: 1..<9))
XCTAssertTrue(someIndexes.contains(integersIn: 1...8))
XCTAssertFalse(someIndexes.contains(integersIn: 0..<10))
XCTAssertFalse(someIndexes.contains(integersIn: 0...9))
XCTAssertFalse(someIndexes.contains(integersIn: 2..<11))
XCTAssertFalse(someIndexes.contains(integersIn: 2...10))
XCTAssertFalse(someIndexes.contains(integersIn: 0..<9))
XCTAssertFalse(someIndexes.contains(integersIn: 0...8))
XCTAssertTrue(someIndexes.intersects(integersIn: 1..<10))
XCTAssertTrue(someIndexes.intersects(integersIn: 1...9))
XCTAssertTrue(someIndexes.intersects(integersIn: 2..<10))
XCTAssertTrue(someIndexes.intersects(integersIn: 2...9))
XCTAssertTrue(someIndexes.intersects(integersIn: 1..<9))
XCTAssertTrue(someIndexes.intersects(integersIn: 1...8))
XCTAssertTrue(someIndexes.intersects(integersIn: 0..<10))
XCTAssertTrue(someIndexes.intersects(integersIn: 0...9))
XCTAssertTrue(someIndexes.intersects(integersIn: 2..<11))
XCTAssertTrue(someIndexes.intersects(integersIn: 2...10))
XCTAssertTrue(someIndexes.intersects(integersIn: 0..<9))
XCTAssertTrue(someIndexes.intersects(integersIn: 0...8))
XCTAssertFalse(someIndexes.intersects(integersIn: 0..<0))
XCTAssertFalse(someIndexes.intersects(integersIn: 10...12))
XCTAssertFalse(someIndexes.intersects(integersIn: 10..<12))
}
func testContainsIndexSet() {
var someIndexes = IndexSet()
someIndexes.insert(integersIn: 1..<2)
someIndexes.insert(integersIn: 100..<200)
someIndexes.insert(integersIn: 1000..<2000)
let contained1 = someIndexes
let contained2 = IndexSet(integersIn: 120..<150)
var contained3 = IndexSet()
contained3.insert(integersIn: 100..<200)
contained3.insert(integersIn: 1500..<1600)
let notContained1 = IndexSet(integer: 9)
let notContained2 = IndexSet(integersIn: 150..<300)
var notContained3 = IndexSet()
notContained3.insert(integersIn: 1..<2)
notContained3.insert(integersIn: 100..<200)
notContained3.insert(integersIn: 1000..<2000)
notContained3.insert(integersIn: 3000..<5000)
XCTAssertTrue(someIndexes.contains(integersIn: contained1))
XCTAssertTrue(someIndexes.contains(integersIn: contained2))
XCTAssertTrue(someIndexes.contains(integersIn: contained3))
XCTAssertFalse(someIndexes.contains(integersIn: notContained1))
XCTAssertFalse(someIndexes.contains(integersIn: notContained2))
XCTAssertFalse(someIndexes.contains(integersIn: notContained3))
let emptySet = IndexSet()
XCTAssertTrue(emptySet.contains(integersIn: emptySet))
XCTAssertTrue(someIndexes.contains(integersIn: emptySet))
XCTAssertFalse(emptySet.contains(integersIn: someIndexes))
}
func testIteration() {
var someIndexes = IndexSet(integersIn: 1..<5)
someIndexes.insert(integersIn: 8..<11)
someIndexes.insert(15)
let start = someIndexes.startIndex
let end = someIndexes.endIndex
// Count forwards
var i = start
var count = 0
while i != end {
count += 1
i = someIndexes.index(after: i)
}
XCTAssertEqual(8, count)
// Count backwards
i = end
count = 0
while i != start {
i = someIndexes.index(before: i)
count += 1
}
XCTAssertEqual(8, count)
// Count using a for loop
count = 0
for _ in someIndexes {
count += 1
}
XCTAssertEqual(8, count)
// Go the other way
count = 0
for _ in someIndexes.reversed() {
count += 1
}
XCTAssertEqual(8, count)
}
func testRangeIteration() {
var someIndexes = IndexSet(integersIn: 1..<5)
someIndexes.insert(integersIn: 8..<11)
someIndexes.insert(15)
var count = 0
for r in someIndexes.rangeView {
// print("\(r)")
count += 1
if count == 3 {
XCTAssertEqual(r, 15..<16)
}
}
XCTAssertEqual(3, count)
// Backwards
count = 0
for r in someIndexes.rangeView.reversed() {
// print("\(r)")
count += 1
if count == 3 {
XCTAssertEqual(r, 1..<5)
}
}
XCTAssertEqual(3, count)
}
func testSubrangeIteration() {
var someIndexes = IndexSet(integersIn: 2..<5)
someIndexes.insert(integersIn: 8..<11)
someIndexes.insert(integersIn: 15..<20)
someIndexes.insert(integersIn: 30..<40)
someIndexes.insert(integersIn: 60..<80)
var count = 0
for _ in someIndexes.rangeView {
count += 1
}
XCTAssertEqual(5, count)
count = 0
for r in someIndexes.rangeView(of: 9..<35) {
if count == 0 {
XCTAssertEqual(r, 9..<11)
}
count += 1
if count == 3 {
XCTAssertEqual(r, 30..<35)
}
}
XCTAssertEqual(3, count)
count = 0
for r in someIndexes.rangeView(of: 0...34) {
if count == 0 {
XCTAssertEqual(r, 2..<5)
}
count += 1
if count == 4 {
XCTAssertEqual(r, 30..<35)
}
}
XCTAssertEqual(4, count)
// Empty intersection, before start
count = 0
for _ in someIndexes.rangeView(of: 0..<1) {
count += 1
}
XCTAssertEqual(0, count)
// Empty range
count = 0
for _ in someIndexes.rangeView(of: 0..<0) {
count += 1
}
XCTAssertEqual(0, count)
// Empty intersection, after end
count = 0
for _ in someIndexes.rangeView(of: 999..<1000) {
count += 1
}
XCTAssertEqual(0, count)
}
func testSlicing() {
var someIndexes = IndexSet(integersIn: 2..<5)
someIndexes.insert(integersIn: 8..<11)
someIndexes.insert(integersIn: 15..<20)
someIndexes.insert(integersIn: 30..<40)
someIndexes.insert(integersIn: 60..<80)
var r : Range<IndexSet.Index>
r = someIndexes.indexRange(in: 5..<25)
XCTAssertEqual(8, someIndexes[r.lowerBound])
XCTAssertEqual(19, someIndexes[someIndexes.index(before: r.upperBound)])
var count = 0
for _ in someIndexes[r] {
count += 1
}
XCTAssertEqual(8, someIndexes.count(in: 5..<25))
XCTAssertEqual(8, count)
r = someIndexes.indexRange(in: 100...199)
XCTAssertTrue(r.isEmpty)
let emptySlice = someIndexes[r]
XCTAssertEqual(0, emptySlice.count)
let boundarySlice = someIndexes[someIndexes.indexRange(in: 2..<3)]
XCTAssertEqual(1, boundarySlice.count)
let boundarySlice2 = someIndexes[someIndexes.indexRange(in: 79..<80)]
XCTAssertEqual(1, boundarySlice2.count)
let largeSlice = someIndexes[someIndexes.indexRange(in: 0..<100000)]
XCTAssertEqual(someIndexes.count, largeSlice.count)
}
func testEmptyIteration() {
var empty = IndexSet()
let start = empty.startIndex
let end = empty.endIndex
XCTAssertEqual(start, end)
var count = 0
for _ in empty {
count += 1
}
XCTAssertEqual(count, 0)
count = 0
for _ in empty.rangeView {
count += 1
}
XCTAssertEqual(count, 0)
empty.insert(5)
empty.remove(5)
count = 0
for _ in empty {
count += 1
}
XCTAssertEqual(count, 0)
count = 0
for _ in empty.rangeView {
count += 1
}
XCTAssertEqual(count, 0)
}
func testSubsequences() {
var someIndexes = IndexSet(integersIn: 1..<5)
someIndexes.insert(integersIn: 8..<11)
someIndexes.insert(15)
// Get a subsequence of this IndexSet
let range = someIndexes.indexRange(in: 4..<15)
let subSet = someIndexes[range]
XCTAssertEqual(subSet.count, 4)
// Iterate a subset
var count = 0
for _ in subSet {
count += 1
}
XCTAssertEqual(count, 4)
// And in reverse
count = 0
for _ in subSet.reversed() {
count += 1
}
XCTAssertEqual(count, 4)
}
func testFiltering() {
var someIndexes = IndexSet(integersIn: 1..<5)
someIndexes.insert(integersIn: 8..<11)
someIndexes.insert(15)
// An array
let resultArray = someIndexes.filter { $0 % 2 == 0 }
XCTAssertEqual(resultArray.count, 4)
let resultSet = someIndexes.filteredIndexSet { $0 % 2 == 0 }
XCTAssertEqual(resultSet.count, 4)
let resultOutsideRange = someIndexes.filteredIndexSet(in: 20..<30, includeInteger: { _ in return true } )
XCTAssertEqual(resultOutsideRange.count, 0)
let resultInRange = someIndexes.filteredIndexSet(in: 0..<16, includeInteger: { _ in return true } )
XCTAssertEqual(resultInRange.count, someIndexes.count)
}
func testFilteringRanges() {
var someIndexes = IndexSet(integersIn: 1..<5)
someIndexes.insert(integersIn: 8..<11)
someIndexes.insert(15)
let resultArray = someIndexes.rangeView.filter { $0.count > 1 }
XCTAssertEqual(resultArray.count, 2)
}
func testShift() {
var someIndexes = IndexSet(integersIn: 1..<5)
someIndexes.insert(integersIn: 8..<11)
someIndexes.insert(15)
let lastValue = someIndexes.last!
someIndexes.shift(startingAt: 13, by: 1)
// Count should not have changed
XCTAssertEqual(someIndexes.count, 8)
// But the last value should have
XCTAssertEqual(lastValue + 1, someIndexes.last!)
// Shift starting at something not in the set
someIndexes.shift(startingAt: 0, by: 1)
// Count should not have changed, again
XCTAssertEqual(someIndexes.count, 8)
// But the last value should have, again
XCTAssertEqual(lastValue + 2, someIndexes.last!)
}
func testSymmetricDifference() {
var is1 : IndexSet
var is2 : IndexSet
var expected : IndexSet
do {
is1 = IndexSet()
is1.insert(integersIn: 1..<3)
is1.insert(integersIn: 4..<11)
is1.insert(integersIn: 15..<21)
is1.insert(integersIn: 40..<51)
is2 = IndexSet()
is2.insert(integersIn: 5..<18)
is2.insert(integersIn: 45..<61)
expected = IndexSet()
expected.insert(integersIn: 1..<3)
expected.insert(4)
expected.insert(integersIn: 11..<15)
expected.insert(integersIn: 18..<21)
expected.insert(integersIn: 40..<45)
expected.insert(integersIn: 51..<61)
XCTAssertEqual(expected, is1.symmetricDifference(is2))
XCTAssertEqual(expected, is2.symmetricDifference(is1))
}
do {
is1 = IndexSet()
is1.insert(integersIn: 5..<18)
is1.insert(integersIn: 45..<61)
is2 = IndexSet()
is2.insert(integersIn: 5..<18)
is2.insert(integersIn: 45..<61)
expected = IndexSet()
XCTAssertEqual(expected, is1.symmetricDifference(is2))
XCTAssertEqual(expected, is2.symmetricDifference(is1))
}
do {
is1 = IndexSet(integersIn: 1..<10)
is2 = IndexSet(integersIn: 20..<30)
expected = IndexSet()
expected.insert(integersIn: 1..<10)
expected.insert(integersIn: 20..<30)
XCTAssertEqual(expected, is1.symmetricDifference(is2))
XCTAssertEqual(expected, is2.symmetricDifference(is1))
}
do {
is1 = IndexSet(integersIn: 1..<10)
is2 = IndexSet(integersIn: 1..<11)
expected = IndexSet(integer: 10)
XCTAssertEqual(expected, is1.symmetricDifference(is2))
XCTAssertEqual(expected, is2.symmetricDifference(is1))
}
do {
is1 = IndexSet(integer: 42)
is2 = IndexSet(integer: 42)
XCTAssertEqual(IndexSet(), is1.symmetricDifference(is2))
XCTAssertEqual(IndexSet(), is2.symmetricDifference(is1))
}
do {
is1 = IndexSet(integer: 1)
is1.insert(3)
is1.insert(5)
is1.insert(7)
is2 = IndexSet(integer: 0)
is2.insert(2)
is2.insert(4)
is2.insert(6)
expected = IndexSet(integersIn: 0..<8)
XCTAssertEqual(expected, is1.symmetricDifference(is2))
XCTAssertEqual(expected, is2.symmetricDifference(is1))
}
do {
is1 = IndexSet(integersIn: 0..<5)
is2 = IndexSet(integersIn: 3..<10)
expected = IndexSet(integersIn: 0..<3)
expected.insert(integersIn: 5..<10)
XCTAssertEqual(expected, is1.symmetricDifference(is2))
XCTAssertEqual(expected, is2.symmetricDifference(is1))
}
do {
is1 = IndexSet([0, 2])
is2 = IndexSet([0, 1, 2])
XCTAssertEqual(IndexSet(integer: 1), is1.symmetricDifference(is2))
}
}
func testIntersection() {
var is1 : IndexSet
var is2 : IndexSet
var expected : IndexSet
do {
is1 = IndexSet()
is1.insert(integersIn: 1..<3)
is1.insert(integersIn: 4..<11)
is1.insert(integersIn: 15..<21)
is1.insert(integersIn: 40..<51)
is2 = IndexSet()
is2.insert(integersIn: 5..<18)
is2.insert(integersIn: 45..<61)
expected = IndexSet()
expected.insert(integersIn: 5..<11)
expected.insert(integersIn: 15..<18)
expected.insert(integersIn: 45..<51)
XCTAssertEqual(expected, is1.intersection(is2))
XCTAssertEqual(expected, is2.intersection(is1))
}
do {
is1 = IndexSet()
is1.insert(integersIn: 5..<11)
is1.insert(integersIn: 20..<31)
is2 = IndexSet()
is2.insert(integersIn: 11..<20)
is2.insert(integersIn: 31..<40)
XCTAssertEqual(IndexSet(), is1.intersection(is2))
XCTAssertEqual(IndexSet(), is2.intersection(is1))
}
do {
is1 = IndexSet(integer: 42)
is2 = IndexSet(integer: 42)
XCTAssertEqual(IndexSet(integer: 42), is1.intersection(is2))
}
do {
is1 = IndexSet(integer: 1)
is1.insert(3)
is1.insert(5)
is1.insert(7)
is2 = IndexSet(integer: 0)
is2.insert(2)
is2.insert(4)
is2.insert(6)
expected = IndexSet()
XCTAssertEqual(expected, is1.intersection(is2))
XCTAssertEqual(expected, is2.intersection(is1))
}
do {
is1 = IndexSet(integersIn: 0..<5)
is2 = IndexSet(integersIn: 4..<10)
expected = IndexSet(integer: 4)
XCTAssertEqual(expected, is1.intersection(is2))
XCTAssertEqual(expected, is2.intersection(is1))
}
do {
is1 = IndexSet([0, 2])
is2 = IndexSet([0, 1, 2])
XCTAssertEqual(is1, is1.intersection(is2))
}
}
func testUnion() {
var is1 : IndexSet
var is2 : IndexSet
var expected : IndexSet
do {
is1 = IndexSet()
is1.insert(integersIn: 1..<3)
is1.insert(integersIn: 4..<11)
is1.insert(integersIn: 15..<21)
is1.insert(integersIn: 40..<51)
is2 = IndexSet()
is2.insert(integersIn: 5..<18)
is2.insert(integersIn: 45..<61)
expected = IndexSet()
expected.insert(integersIn: 1..<3)
expected.insert(integersIn: 4..<21)
expected.insert(integersIn: 40..<61)
let u1 = is1.union(is2)
XCTAssertEqual(expected, u1)
}
do {
is1 = IndexSet()
is1.insert(integersIn: 5..<11)
is1.insert(integersIn: 20..<31)
is2 = IndexSet()
is2.insert(integersIn: 11..<20)
is2.insert(integersIn: 31..<40)
expected = IndexSet()
expected.insert(integersIn: 5..<11)
expected.insert(integersIn: 20..<31)
expected.insert(integersIn: 11..<20)
expected.insert(integersIn: 31..<40)
XCTAssertEqual(expected, is1.union(is2))
XCTAssertEqual(expected, is2.union(is1))
}
do {
is1 = IndexSet(integer: 42)
is2 = IndexSet(integer: 42)
let u1 = is1.union(is2)
XCTAssertEqual(IndexSet(integer: 42), u1)
}
do {
is1 = IndexSet()
is1.insert(integersIn: 5..<10)
is1.insert(integersIn: 15..<20)
is2 = IndexSet()
is2.insert(integersIn: 1..<4)
is2.insert(integersIn: 15..<20)
expected = IndexSet()
expected.insert(integersIn: 1..<4)
expected.insert(integersIn: 5..<10)
expected.insert(integersIn: 15..<20)
XCTAssertEqual(expected, is1.union(is2))
XCTAssertEqual(expected, is2.union(is1))
}
XCTAssertEqual(IndexSet(), IndexSet().union(IndexSet()))
do {
is1 = IndexSet(integer: 1)
is1.insert(3)
is1.insert(5)
is1.insert(7)
is2 = IndexSet(integer: 0)
is2.insert(2)
is2.insert(4)
is2.insert(6)
expected = IndexSet()
XCTAssertEqual(expected, is1.intersection(is2))
XCTAssertEqual(expected, is2.intersection(is1))
}
do {
is1 = IndexSet(integersIn: 0..<5)
is2 = IndexSet(integersIn: 3..<10)
expected = IndexSet(integersIn: 0..<10)
XCTAssertEqual(expected, is1.union(is2))
XCTAssertEqual(expected, is2.union(is1))
}
do {
is1 = IndexSet()
is1.insert(2)
is1.insert(6)
is1.insert(21)
is1.insert(22)
is2 = IndexSet()
is2.insert(8)
is2.insert(14)
is2.insert(21)
is2.insert(22)
is2.insert(24)
expected = IndexSet()
expected.insert(2)
expected.insert(6)
expected.insert(21)
expected.insert(22)
expected.insert(8)
expected.insert(14)
expected.insert(21)
expected.insert(22)
expected.insert(24)
let u1 = is1.union(is2)
let u2 = is2.union(is1)