From 26a029d407be480d791972afb5975cf62c9360a6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 02:47:55 +0200 Subject: Adding upstream version 124.0.1. Signed-off-by: Daniel Baumann --- mfbt/tests/TestBinarySearch.cpp | 158 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 158 insertions(+) create mode 100644 mfbt/tests/TestBinarySearch.cpp (limited to 'mfbt/tests/TestBinarySearch.cpp') diff --git a/mfbt/tests/TestBinarySearch.cpp b/mfbt/tests/TestBinarySearch.cpp new file mode 100644 index 0000000000..3cd28b309f --- /dev/null +++ b/mfbt/tests/TestBinarySearch.cpp @@ -0,0 +1,158 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this file, + * You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "mozilla/Assertions.h" +#include "mozilla/BinarySearch.h" +#include "mozilla/Vector.h" + +#include + +using mozilla::ArrayLength; +using mozilla::BinarySearch; +using mozilla::BinarySearchIf; +using mozilla::Vector; + +#define A(a) MOZ_RELEASE_ASSERT(a) + +struct Person { + int mAge; + int mId; + Person(int aAge, int aId) : mAge(aAge), mId(aId) {} +}; + +struct GetAge { + Vector& mV; + explicit GetAge(Vector& aV) : mV(aV) {} + int operator[](size_t index) const { return mV[index].mAge; } +}; + +struct RangeFinder { + const int mLower, mUpper; + RangeFinder(int lower, int upper) : mLower(lower), mUpper(upper) {} + int operator()(int val) const { + if (val >= mUpper) return -1; + if (val < mLower) return 1; + return 0; + } +}; + +static void TestBinarySearch() { + size_t m; + + Vector v1; + MOZ_RELEASE_ASSERT(v1.append(2)); + MOZ_RELEASE_ASSERT(v1.append(4)); + MOZ_RELEASE_ASSERT(v1.append(6)); + MOZ_RELEASE_ASSERT(v1.append(8)); + + MOZ_RELEASE_ASSERT(!BinarySearch(v1, 0, v1.length(), 1, &m) && m == 0); + MOZ_RELEASE_ASSERT(BinarySearch(v1, 0, v1.length(), 2, &m) && m == 0); + MOZ_RELEASE_ASSERT(!BinarySearch(v1, 0, v1.length(), 3, &m) && m == 1); + MOZ_RELEASE_ASSERT(BinarySearch(v1, 0, v1.length(), 4, &m) && m == 1); + MOZ_RELEASE_ASSERT(!BinarySearch(v1, 0, v1.length(), 5, &m) && m == 2); + MOZ_RELEASE_ASSERT(BinarySearch(v1, 0, v1.length(), 6, &m) && m == 2); + MOZ_RELEASE_ASSERT(!BinarySearch(v1, 0, v1.length(), 7, &m) && m == 3); + MOZ_RELEASE_ASSERT(BinarySearch(v1, 0, v1.length(), 8, &m) && m == 3); + MOZ_RELEASE_ASSERT(!BinarySearch(v1, 0, v1.length(), 9, &m) && m == 4); + + MOZ_RELEASE_ASSERT(!BinarySearch(v1, 1, 3, 1, &m) && m == 1); + MOZ_RELEASE_ASSERT(!BinarySearch(v1, 1, 3, 2, &m) && m == 1); + MOZ_RELEASE_ASSERT(!BinarySearch(v1, 1, 3, 3, &m) && m == 1); + MOZ_RELEASE_ASSERT(BinarySearch(v1, 1, 3, 4, &m) && m == 1); + MOZ_RELEASE_ASSERT(!BinarySearch(v1, 1, 3, 5, &m) && m == 2); + MOZ_RELEASE_ASSERT(BinarySearch(v1, 1, 3, 6, &m) && m == 2); + MOZ_RELEASE_ASSERT(!BinarySearch(v1, 1, 3, 7, &m) && m == 3); + MOZ_RELEASE_ASSERT(!BinarySearch(v1, 1, 3, 8, &m) && m == 3); + MOZ_RELEASE_ASSERT(!BinarySearch(v1, 1, 3, 9, &m) && m == 3); + + MOZ_RELEASE_ASSERT(!BinarySearch(v1, 0, 0, 0, &m) && m == 0); + MOZ_RELEASE_ASSERT(!BinarySearch(v1, 0, 0, 9, &m) && m == 0); + + Vector v2; + MOZ_RELEASE_ASSERT(!BinarySearch(v2, 0, 0, 0, &m) && m == 0); + MOZ_RELEASE_ASSERT(!BinarySearch(v2, 0, 0, 9, &m) && m == 0); + + Vector v3; + MOZ_RELEASE_ASSERT(v3.append(Person(2, 42))); + MOZ_RELEASE_ASSERT(v3.append(Person(4, 13))); + MOZ_RELEASE_ASSERT(v3.append(Person(6, 360))); + + A(!BinarySearch(GetAge(v3), 0, v3.length(), 1, &m) && m == 0); + A(BinarySearch(GetAge(v3), 0, v3.length(), 2, &m) && m == 0); + A(!BinarySearch(GetAge(v3), 0, v3.length(), 3, &m) && m == 1); + A(BinarySearch(GetAge(v3), 0, v3.length(), 4, &m) && m == 1); + A(!BinarySearch(GetAge(v3), 0, v3.length(), 5, &m) && m == 2); + A(BinarySearch(GetAge(v3), 0, v3.length(), 6, &m) && m == 2); + A(!BinarySearch(GetAge(v3), 0, v3.length(), 7, &m) && m == 3); +} + +static void TestBinarySearchIf() { + const int v1[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}; + const size_t len = ArrayLength(v1); + size_t m; + + A(BinarySearchIf(v1, 0, len, RangeFinder(2, 3), &m) && m == 2); + A(!BinarySearchIf(v1, 0, len, RangeFinder(-5, -2), &m) && m == 0); + A(BinarySearchIf(v1, 0, len, RangeFinder(3, 5), &m) && m >= 3 && m < 5); + A(!BinarySearchIf(v1, 0, len, RangeFinder(10, 12), &m) && m == 10); +} + +static void TestEqualRange() { + struct CompareN { + int mVal; + explicit CompareN(int n) : mVal(n) {} + int operator()(int aVal) const { return mVal - aVal; } + }; + + constexpr int kMaxNumber = 100; + constexpr int kMaxRepeat = 2; + + Vector sortedArray; + MOZ_RELEASE_ASSERT(sortedArray.reserve(kMaxNumber * kMaxRepeat)); + + // Make a sorted array by appending the loop counter [0, kMaxRepeat] times + // in each iteration. The array will be something like: + // [0, 0, 1, 1, 2, 2, 8, 9, ..., kMaxNumber] + for (int i = 0; i <= kMaxNumber; ++i) { + int repeat = rand() % (kMaxRepeat + 1); + for (int j = 0; j < repeat; ++j) { + MOZ_RELEASE_ASSERT(sortedArray.emplaceBack(i)); + } + } + + for (int i = -1; i < kMaxNumber + 1; ++i) { + auto bounds = EqualRange(sortedArray, 0, sortedArray.length(), CompareN(i)); + + MOZ_RELEASE_ASSERT(bounds.first <= sortedArray.length()); + MOZ_RELEASE_ASSERT(bounds.second <= sortedArray.length()); + MOZ_RELEASE_ASSERT(bounds.first <= bounds.second); + + if (bounds.first == 0) { + MOZ_RELEASE_ASSERT(sortedArray[0] >= i); + } else if (bounds.first == sortedArray.length()) { + MOZ_RELEASE_ASSERT(sortedArray[sortedArray.length() - 1] < i); + } else { + MOZ_RELEASE_ASSERT(sortedArray[bounds.first - 1] < i); + MOZ_RELEASE_ASSERT(sortedArray[bounds.first] >= i); + } + + if (bounds.second == 0) { + MOZ_RELEASE_ASSERT(sortedArray[0] > i); + } else if (bounds.second == sortedArray.length()) { + MOZ_RELEASE_ASSERT(sortedArray[sortedArray.length() - 1] <= i); + } else { + MOZ_RELEASE_ASSERT(sortedArray[bounds.second - 1] <= i); + MOZ_RELEASE_ASSERT(sortedArray[bounds.second] > i); + } + } +} + +int main() { + TestBinarySearch(); + TestBinarySearchIf(); + TestEqualRange(); + return 0; +} -- cgit v1.2.3