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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift open source project
//
// Copyright (c) 2020 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
//
//===----------------------------------------------------------------------===//
import XCTest
@testable import PackageCollections
class TrieTests: XCTestCase {
func testContains() {
let trie = Trie<Int>()
let doc1 = "THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG"
self.indexDocument(id: 1, contents: doc1, trie: trie)
// Whole word match
XCTAssertTrue(trie.contains(word: "brown", prefixMatch: false))
XCTAssertTrue(trie.contains(word: "Fox", prefixMatch: false))
XCTAssertFalse(trie.contains(word: "foobar", prefixMatch: false))
// Prefix match
XCTAssertTrue(trie.contains(word: "d", prefixMatch: true))
XCTAssertTrue(trie.contains(word: "Do", prefixMatch: true))
XCTAssertFalse(trie.contains(word: "doo", prefixMatch: true))
}
func testFind() {
let trie = Trie<Int>()
let doc1 = "the quick brown fox jumps over the lazy dog and the dog does not notice the fox jumps over it"
let doc2 = "the quick brown fox jumps over the lazy dog for the lazy dog has blocked its way for far too long"
self.indexDocument(id: 1, contents: doc1, trie: trie)
self.indexDocument(id: 2, contents: doc2, trie: trie)
XCTAssertEqual(try trie.find(word: "brown"), [1, 2])
XCTAssertEqual(try trie.find(word: "blocked"), [2])
XCTAssertThrowsError(try trie.find(word: "fo"), "expected error") { error in
XCTAssert(error is NotFoundError)
}
}
func testFindWithPrefix() {
let trie = Trie<Int>()
let doc1 = "the quick brown fox jumps over the lazy dog and the dog does not notice the fox jumps over it"
let doc2 = "the quick brown fox jumps over the lazy dog for the lazy dog has blocked its way for far too long"
self.indexDocument(id: 1, contents: doc1, trie: trie)
self.indexDocument(id: 2, contents: doc2, trie: trie)
XCTAssertEqual(try trie.findWithPrefix("f"), ["fox": [1, 2], "for": [2], "far": [2]])
XCTAssertEqual(try trie.findWithPrefix("fo"), ["fox": [1, 2], "for": [2]])
XCTAssertEqual(try trie.findWithPrefix("far"), ["far": [2]])
XCTAssertThrowsError(try trie.findWithPrefix("foo"), "expected error") { error in
XCTAssert(error is NotFoundError)
}
}
func testRemoveDocument() {
let trie = Trie<Int>()
let doc1 = "the quick brown fox jumps over the lazy dog"
let doc2 = "the dog does not notice the fox jumps over it"
let doc3 = "it has blocked the fox for far too long"
self.indexDocument(id: 1, contents: doc1, trie: trie)
self.indexDocument(id: 2, contents: doc2, trie: trie)
self.indexDocument(id: 3, contents: doc3, trie: trie)
XCTAssertEqual(try trie.find(word: "fox"), [1, 2, 3])
XCTAssertEqual(try trie.find(word: "dog"), [1, 2])
XCTAssertEqual(try trie.find(word: "it"), [2, 3])
XCTAssertEqual(try trie.find(word: "lazy"), [1])
XCTAssertEqual(try trie.find(word: "notice"), [2])
XCTAssertEqual(try trie.find(word: "blocked"), [3])
trie.remove(document: 3)
XCTAssertEqual(try trie.find(word: "fox"), [1, 2])
XCTAssertEqual(try trie.find(word: "dog"), [1, 2])
XCTAssertEqual(try trie.find(word: "it"), [2])
XCTAssertEqual(try trie.find(word: "lazy"), [1])
XCTAssertEqual(try trie.find(word: "notice"), [2])
XCTAssertThrowsError(try trie.find(word: "blocked"), "expected error") { error in
XCTAssert(error is NotFoundError)
}
trie.remove(document: 1)
XCTAssertEqual(try trie.find(word: "fox"), [2])
XCTAssertEqual(try trie.find(word: "dog"), [2])
XCTAssertEqual(try trie.find(word: "it"), [2])
XCTAssertThrowsError(try trie.find(word: "lazy"), "expected error") { error in
XCTAssert(error is NotFoundError)
}
XCTAssertEqual(try trie.find(word: "notice"), [2])
XCTAssertThrowsError(try trie.find(word: "blocked"), "expected error") { error in
XCTAssert(error is NotFoundError)
}
trie.remove(document: 2)
XCTAssertThrowsError(try trie.find(word: "fox"), "expected error") { error in
XCTAssert(error is NotFoundError)
}
XCTAssertThrowsError(try trie.find(word: "dog"), "expected error") { error in
XCTAssert(error is NotFoundError)
}
XCTAssertThrowsError(try trie.find(word: "it"), "expected error") { error in
XCTAssert(error is NotFoundError)
}
XCTAssertThrowsError(try trie.find(word: "lazy"), "expected error") { error in
XCTAssert(error is NotFoundError)
}
XCTAssertThrowsError(try trie.find(word: "notice"), "expected error") { error in
XCTAssert(error is NotFoundError)
}
XCTAssertThrowsError(try trie.find(word: "blocked"), "expected error") { error in
XCTAssert(error is NotFoundError)
}
}
func testRemoveDocumentsWithPredicate() {
let trie = Trie<Int>()
let doc1 = "the quick brown fox jumps over the lazy dog"
let doc2 = "the dog does not notice the fox jumps over it"
let doc3 = "it has blocked the fox for far too long"
self.indexDocument(id: 1, contents: doc1, trie: trie)
self.indexDocument(id: 2, contents: doc2, trie: trie)
self.indexDocument(id: 3, contents: doc3, trie: trie)
XCTAssertEqual(try trie.find(word: "fox"), [1, 2, 3])
XCTAssertEqual(try trie.find(word: "dog"), [1, 2])
XCTAssertEqual(try trie.find(word: "it"), [2, 3])
XCTAssertEqual(try trie.find(word: "lazy"), [1])
XCTAssertEqual(try trie.find(word: "notice"), [2])
XCTAssertEqual(try trie.find(word: "blocked"), [3])
trie.remove { $0 == 3 }
XCTAssertEqual(try trie.find(word: "fox"), [1, 2])
XCTAssertEqual(try trie.find(word: "dog"), [1, 2])
XCTAssertEqual(try trie.find(word: "it"), [2])
XCTAssertEqual(try trie.find(word: "lazy"), [1])
XCTAssertEqual(try trie.find(word: "notice"), [2])
XCTAssertThrowsError(try trie.find(word: "blocked"), "expected error") { error in
XCTAssert(error is NotFoundError)
}
trie.remove { $0 == 1 }
XCTAssertEqual(try trie.find(word: "fox"), [2])
XCTAssertEqual(try trie.find(word: "dog"), [2])
XCTAssertEqual(try trie.find(word: "it"), [2])
XCTAssertThrowsError(try trie.find(word: "lazy"), "expected error") { error in
XCTAssert(error is NotFoundError)
}
XCTAssertEqual(try trie.find(word: "notice"), [2])
XCTAssertThrowsError(try trie.find(word: "blocked"), "expected error") { error in
XCTAssert(error is NotFoundError)
}
trie.remove { $0 == 2 }
XCTAssertThrowsError(try trie.find(word: "fox"), "expected error") { error in
XCTAssert(error is NotFoundError)
}
XCTAssertThrowsError(try trie.find(word: "dog"), "expected error") { error in
XCTAssert(error is NotFoundError)
}
XCTAssertThrowsError(try trie.find(word: "it"), "expected error") { error in
XCTAssert(error is NotFoundError)
}
XCTAssertThrowsError(try trie.find(word: "lazy"), "expected error") { error in
XCTAssert(error is NotFoundError)
}
XCTAssertThrowsError(try trie.find(word: "notice"), "expected error") { error in
XCTAssert(error is NotFoundError)
}
XCTAssertThrowsError(try trie.find(word: "blocked"), "expected error") { error in
XCTAssert(error is NotFoundError)
}
}
private func indexDocument(id: Int, contents: String, trie: Trie<Int>) {
let words = contents.components(separatedBy: " ")
words.forEach { word in
trie.insert(word: word, foundIn: id)
}
}
func testThreadSafe() {
let queue = DispatchQueue(label: "TrieTests", attributes: .concurrent)
let trie = Trie<Int>()
let docCount = 100
for _ in 0 ..< 100 {
let sync = DispatchGroup()
for i in 0 ..< docCount {
queue.async(group: sync) {
Thread.sleep(forTimeInterval: Double.random(in: 100 ... 300) * 1.0e-6)
trie.remove { $0 == i }
trie.insert(word: "word-\(i)", foundIn: i)
trie.insert(word: "test", foundIn: i)
}
}
switch sync.wait(timeout: .now() + 1) {
case .timedOut:
XCTFail("timeout")
case .success:
for doc in 0 ..< docCount {
XCTAssertEqual(try trie.find(word: "word-\(doc)"), [doc])
XCTAssertEqual(try trie.find(word: "test").count, docCount)
}
}
}
}
}
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