forked from OSchip/llvm-project
551 lines
16 KiB
C++
551 lines
16 KiB
C++
//===- llvm/unittest/ADT/StringMapMap.cpp - StringMap unit tests ----------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ADT/StringMap.h"
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#include "llvm/ADT/Twine.h"
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#include "llvm/Support/DataTypes.h"
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#include "gtest/gtest.h"
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#include <limits>
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#include <tuple>
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using namespace llvm;
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namespace {
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// Test fixture
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class StringMapTest : public testing::Test {
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protected:
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StringMap<uint32_t> testMap;
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static const char testKey[];
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static const uint32_t testValue;
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static const char* testKeyFirst;
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static size_t testKeyLength;
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static const std::string testKeyStr;
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void assertEmptyMap() {
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// Size tests
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EXPECT_EQ(0u, testMap.size());
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EXPECT_TRUE(testMap.empty());
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// Iterator tests
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EXPECT_TRUE(testMap.begin() == testMap.end());
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// Lookup tests
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EXPECT_EQ(0u, testMap.count(testKey));
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EXPECT_EQ(0u, testMap.count(StringRef(testKeyFirst, testKeyLength)));
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EXPECT_EQ(0u, testMap.count(testKeyStr));
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EXPECT_TRUE(testMap.find(testKey) == testMap.end());
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EXPECT_TRUE(testMap.find(StringRef(testKeyFirst, testKeyLength)) ==
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testMap.end());
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EXPECT_TRUE(testMap.find(testKeyStr) == testMap.end());
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}
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void assertSingleItemMap() {
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// Size tests
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EXPECT_EQ(1u, testMap.size());
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EXPECT_FALSE(testMap.begin() == testMap.end());
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EXPECT_FALSE(testMap.empty());
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// Iterator tests
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StringMap<uint32_t>::iterator it = testMap.begin();
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EXPECT_STREQ(testKey, it->first().data());
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EXPECT_EQ(testValue, it->second);
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++it;
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EXPECT_TRUE(it == testMap.end());
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// Lookup tests
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EXPECT_EQ(1u, testMap.count(testKey));
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EXPECT_EQ(1u, testMap.count(StringRef(testKeyFirst, testKeyLength)));
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EXPECT_EQ(1u, testMap.count(testKeyStr));
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EXPECT_TRUE(testMap.find(testKey) == testMap.begin());
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EXPECT_TRUE(testMap.find(StringRef(testKeyFirst, testKeyLength)) ==
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testMap.begin());
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EXPECT_TRUE(testMap.find(testKeyStr) == testMap.begin());
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}
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};
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const char StringMapTest::testKey[] = "key";
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const uint32_t StringMapTest::testValue = 1u;
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const char* StringMapTest::testKeyFirst = testKey;
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size_t StringMapTest::testKeyLength = sizeof(testKey) - 1;
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const std::string StringMapTest::testKeyStr(testKey);
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struct CountCopyAndMove {
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CountCopyAndMove() = default;
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CountCopyAndMove(const CountCopyAndMove &) { copy = 1; }
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CountCopyAndMove(CountCopyAndMove &&) { move = 1; }
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void operator=(const CountCopyAndMove &) { ++copy; }
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void operator=(CountCopyAndMove &&) { ++move; }
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int copy = 0;
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int move = 0;
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};
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// Empty map tests.
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TEST_F(StringMapTest, EmptyMapTest) {
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assertEmptyMap();
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}
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// Constant map tests.
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TEST_F(StringMapTest, ConstEmptyMapTest) {
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const StringMap<uint32_t>& constTestMap = testMap;
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// Size tests
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EXPECT_EQ(0u, constTestMap.size());
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EXPECT_TRUE(constTestMap.empty());
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// Iterator tests
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EXPECT_TRUE(constTestMap.begin() == constTestMap.end());
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// Lookup tests
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EXPECT_EQ(0u, constTestMap.count(testKey));
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EXPECT_EQ(0u, constTestMap.count(StringRef(testKeyFirst, testKeyLength)));
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EXPECT_EQ(0u, constTestMap.count(testKeyStr));
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EXPECT_TRUE(constTestMap.find(testKey) == constTestMap.end());
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EXPECT_TRUE(constTestMap.find(StringRef(testKeyFirst, testKeyLength)) ==
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constTestMap.end());
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EXPECT_TRUE(constTestMap.find(testKeyStr) == constTestMap.end());
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}
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// A map with a single entry.
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TEST_F(StringMapTest, SingleEntryMapTest) {
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testMap[testKey] = testValue;
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assertSingleItemMap();
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}
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// Test clear() method.
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TEST_F(StringMapTest, ClearTest) {
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testMap[testKey] = testValue;
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testMap.clear();
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assertEmptyMap();
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}
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// Test erase(iterator) method.
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TEST_F(StringMapTest, EraseIteratorTest) {
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testMap[testKey] = testValue;
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testMap.erase(testMap.begin());
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assertEmptyMap();
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}
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// Test erase(value) method.
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TEST_F(StringMapTest, EraseValueTest) {
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testMap[testKey] = testValue;
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testMap.erase(testKey);
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assertEmptyMap();
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}
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// Test inserting two values and erasing one.
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TEST_F(StringMapTest, InsertAndEraseTest) {
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testMap[testKey] = testValue;
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testMap["otherKey"] = 2;
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testMap.erase("otherKey");
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assertSingleItemMap();
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}
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TEST_F(StringMapTest, SmallFullMapTest) {
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// StringMap has a tricky corner case when the map is small (<8 buckets) and
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// it fills up through a balanced pattern of inserts and erases. This can
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// lead to inf-loops in some cases (PR13148) so we test it explicitly here.
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llvm::StringMap<int> Map(2);
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Map["eins"] = 1;
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Map["zwei"] = 2;
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Map["drei"] = 3;
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Map.erase("drei");
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Map.erase("eins");
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Map["veir"] = 4;
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Map["funf"] = 5;
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EXPECT_EQ(3u, Map.size());
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EXPECT_EQ(0, Map.lookup("eins"));
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EXPECT_EQ(2, Map.lookup("zwei"));
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EXPECT_EQ(0, Map.lookup("drei"));
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EXPECT_EQ(4, Map.lookup("veir"));
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EXPECT_EQ(5, Map.lookup("funf"));
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}
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TEST_F(StringMapTest, CopyCtorTest) {
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llvm::StringMap<int> Map;
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Map["eins"] = 1;
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Map["zwei"] = 2;
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Map["drei"] = 3;
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Map.erase("drei");
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Map.erase("eins");
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Map["veir"] = 4;
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Map["funf"] = 5;
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EXPECT_EQ(3u, Map.size());
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EXPECT_EQ(0, Map.lookup("eins"));
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EXPECT_EQ(2, Map.lookup("zwei"));
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EXPECT_EQ(0, Map.lookup("drei"));
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EXPECT_EQ(4, Map.lookup("veir"));
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EXPECT_EQ(5, Map.lookup("funf"));
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llvm::StringMap<int> Map2(Map);
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EXPECT_EQ(3u, Map2.size());
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EXPECT_EQ(0, Map2.lookup("eins"));
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EXPECT_EQ(2, Map2.lookup("zwei"));
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EXPECT_EQ(0, Map2.lookup("drei"));
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EXPECT_EQ(4, Map2.lookup("veir"));
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EXPECT_EQ(5, Map2.lookup("funf"));
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}
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// A more complex iteration test.
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TEST_F(StringMapTest, IterationTest) {
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bool visited[100];
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// Insert 100 numbers into the map
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for (int i = 0; i < 100; ++i) {
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std::stringstream ss;
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ss << "key_" << i;
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testMap[ss.str()] = i;
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visited[i] = false;
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}
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// Iterate over all numbers and mark each one found.
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for (StringMap<uint32_t>::iterator it = testMap.begin();
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it != testMap.end(); ++it) {
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std::stringstream ss;
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ss << "key_" << it->second;
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ASSERT_STREQ(ss.str().c_str(), it->first().data());
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visited[it->second] = true;
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}
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// Ensure every number was visited.
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for (int i = 0; i < 100; ++i) {
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ASSERT_TRUE(visited[i]) << "Entry #" << i << " was never visited";
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}
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}
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// Test StringMapEntry::Create() method.
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TEST_F(StringMapTest, StringMapEntryTest) {
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StringMap<uint32_t>::value_type* entry =
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StringMap<uint32_t>::value_type::Create(
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StringRef(testKeyFirst, testKeyLength), 1u);
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EXPECT_STREQ(testKey, entry->first().data());
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EXPECT_EQ(1u, entry->second);
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free(entry);
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}
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// Test insert() method.
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TEST_F(StringMapTest, InsertTest) {
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SCOPED_TRACE("InsertTest");
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testMap.insert(
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StringMap<uint32_t>::value_type::Create(
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StringRef(testKeyFirst, testKeyLength),
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testMap.getAllocator(), 1u));
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assertSingleItemMap();
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}
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// Test insert(pair<K, V>) method
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TEST_F(StringMapTest, InsertPairTest) {
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bool Inserted;
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StringMap<uint32_t>::iterator NewIt;
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std::tie(NewIt, Inserted) =
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testMap.insert(std::make_pair(testKeyFirst, testValue));
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EXPECT_EQ(1u, testMap.size());
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EXPECT_EQ(testValue, testMap[testKeyFirst]);
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EXPECT_EQ(testKeyFirst, NewIt->first());
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EXPECT_EQ(testValue, NewIt->second);
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EXPECT_TRUE(Inserted);
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StringMap<uint32_t>::iterator ExistingIt;
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std::tie(ExistingIt, Inserted) =
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testMap.insert(std::make_pair(testKeyFirst, testValue + 1));
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EXPECT_EQ(1u, testMap.size());
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EXPECT_EQ(testValue, testMap[testKeyFirst]);
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EXPECT_FALSE(Inserted);
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EXPECT_EQ(NewIt, ExistingIt);
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}
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// Test insert(pair<K, V>) method when rehashing occurs
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TEST_F(StringMapTest, InsertRehashingPairTest) {
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// Check that the correct iterator is returned when the inserted element is
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// moved to a different bucket during internal rehashing. This depends on
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// the particular key, and the implementation of StringMap and HashString.
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// Changes to those might result in this test not actually checking that.
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StringMap<uint32_t> t(0);
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EXPECT_EQ(0u, t.getNumBuckets());
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StringMap<uint32_t>::iterator It =
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t.insert(std::make_pair("abcdef", 42)).first;
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EXPECT_EQ(16u, t.getNumBuckets());
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EXPECT_EQ("abcdef", It->first());
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EXPECT_EQ(42u, It->second);
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}
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TEST_F(StringMapTest, InsertOrAssignTest) {
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struct A : CountCopyAndMove {
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A(int v) : v(v) {}
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int v;
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};
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StringMap<A> t(0);
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auto try1 = t.insert_or_assign("A", A(1));
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EXPECT_TRUE(try1.second);
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EXPECT_EQ(1, try1.first->second.v);
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EXPECT_EQ(1, try1.first->second.move);
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auto try2 = t.insert_or_assign("A", A(2));
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EXPECT_FALSE(try2.second);
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EXPECT_EQ(2, try2.first->second.v);
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EXPECT_EQ(2, try1.first->second.move);
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EXPECT_EQ(try1.first, try2.first);
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EXPECT_EQ(0, try1.first->second.copy);
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}
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TEST_F(StringMapTest, IterMapKeys) {
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StringMap<int> Map;
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Map["A"] = 1;
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Map["B"] = 2;
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Map["C"] = 3;
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Map["D"] = 3;
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auto Keys = to_vector<4>(Map.keys());
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llvm::sort(Keys);
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SmallVector<StringRef, 4> Expected = {"A", "B", "C", "D"};
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EXPECT_EQ(Expected, Keys);
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}
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// Create a non-default constructable value
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struct StringMapTestStruct {
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StringMapTestStruct(int i) : i(i) {}
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StringMapTestStruct() = delete;
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int i;
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};
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TEST_F(StringMapTest, NonDefaultConstructable) {
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StringMap<StringMapTestStruct> t;
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t.insert(std::make_pair("Test", StringMapTestStruct(123)));
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StringMap<StringMapTestStruct>::iterator iter = t.find("Test");
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ASSERT_NE(iter, t.end());
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ASSERT_EQ(iter->second.i, 123);
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}
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struct Immovable {
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Immovable() {}
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Immovable(Immovable&&) = delete; // will disable the other special members
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};
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struct MoveOnly {
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int i;
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MoveOnly(int i) : i(i) {}
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MoveOnly(const Immovable&) : i(0) {}
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MoveOnly(MoveOnly &&RHS) : i(RHS.i) {}
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MoveOnly &operator=(MoveOnly &&RHS) {
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i = RHS.i;
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return *this;
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}
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private:
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MoveOnly(const MoveOnly &) = delete;
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MoveOnly &operator=(const MoveOnly &) = delete;
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};
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TEST_F(StringMapTest, MoveOnly) {
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StringMap<MoveOnly> t;
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t.insert(std::make_pair("Test", MoveOnly(42)));
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StringRef Key = "Test";
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StringMapEntry<MoveOnly>::Create(Key, MoveOnly(42))
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->Destroy();
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}
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TEST_F(StringMapTest, CtorArg) {
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StringRef Key = "Test";
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StringMapEntry<MoveOnly>::Create(Key, Immovable())
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->Destroy();
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}
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TEST_F(StringMapTest, MoveConstruct) {
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StringMap<int> A;
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A["x"] = 42;
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StringMap<int> B = std::move(A);
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ASSERT_EQ(A.size(), 0u);
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ASSERT_EQ(B.size(), 1u);
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ASSERT_EQ(B["x"], 42);
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ASSERT_EQ(B.count("y"), 0u);
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}
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TEST_F(StringMapTest, MoveAssignment) {
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StringMap<int> A;
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A["x"] = 42;
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StringMap<int> B;
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B["y"] = 117;
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A = std::move(B);
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ASSERT_EQ(A.size(), 1u);
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ASSERT_EQ(B.size(), 0u);
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ASSERT_EQ(A["y"], 117);
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ASSERT_EQ(B.count("x"), 0u);
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}
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struct Countable {
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int &InstanceCount;
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int Number;
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Countable(int Number, int &InstanceCount)
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: InstanceCount(InstanceCount), Number(Number) {
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++InstanceCount;
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}
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Countable(Countable &&C) : InstanceCount(C.InstanceCount), Number(C.Number) {
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++InstanceCount;
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C.Number = -1;
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}
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Countable(const Countable &C)
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: InstanceCount(C.InstanceCount), Number(C.Number) {
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++InstanceCount;
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}
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Countable &operator=(Countable C) {
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Number = C.Number;
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return *this;
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}
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~Countable() { --InstanceCount; }
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};
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TEST_F(StringMapTest, MoveDtor) {
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int InstanceCount = 0;
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StringMap<Countable> A;
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A.insert(std::make_pair("x", Countable(42, InstanceCount)));
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ASSERT_EQ(InstanceCount, 1);
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auto I = A.find("x");
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ASSERT_NE(I, A.end());
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ASSERT_EQ(I->second.Number, 42);
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StringMap<Countable> B;
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B = std::move(A);
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ASSERT_EQ(InstanceCount, 1);
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ASSERT_TRUE(A.empty());
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I = B.find("x");
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ASSERT_NE(I, B.end());
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ASSERT_EQ(I->second.Number, 42);
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B = StringMap<Countable>();
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ASSERT_EQ(InstanceCount, 0);
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ASSERT_TRUE(B.empty());
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}
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namespace {
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// Simple class that counts how many moves and copy happens when growing a map
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struct CountCtorCopyAndMove {
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static unsigned Ctor;
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static unsigned Move;
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static unsigned Copy;
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int Data = 0;
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CountCtorCopyAndMove(int Data) : Data(Data) { Ctor++; }
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CountCtorCopyAndMove() { Ctor++; }
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CountCtorCopyAndMove(const CountCtorCopyAndMove &) { Copy++; }
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CountCtorCopyAndMove &operator=(const CountCtorCopyAndMove &) {
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Copy++;
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return *this;
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}
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CountCtorCopyAndMove(CountCtorCopyAndMove &&) { Move++; }
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CountCtorCopyAndMove &operator=(const CountCtorCopyAndMove &&) {
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Move++;
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return *this;
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}
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};
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unsigned CountCtorCopyAndMove::Copy = 0;
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unsigned CountCtorCopyAndMove::Move = 0;
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unsigned CountCtorCopyAndMove::Ctor = 0;
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} // anonymous namespace
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// Make sure creating the map with an initial size of N actually gives us enough
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// buckets to insert N items without increasing allocation size.
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TEST(StringMapCustomTest, InitialSizeTest) {
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// 1 is an "edge value", 32 is an arbitrary power of two, and 67 is an
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// arbitrary prime, picked without any good reason.
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for (auto Size : {1, 32, 67}) {
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StringMap<CountCtorCopyAndMove> Map(Size);
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auto NumBuckets = Map.getNumBuckets();
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CountCtorCopyAndMove::Move = 0;
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CountCtorCopyAndMove::Copy = 0;
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for (int i = 0; i < Size; ++i)
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Map.insert(std::pair<std::string, CountCtorCopyAndMove>(
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std::piecewise_construct, std::forward_as_tuple(Twine(i).str()),
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std::forward_as_tuple(i)));
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// After the initial move, the map will move the Elts in the Entry.
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EXPECT_EQ((unsigned)Size * 2, CountCtorCopyAndMove::Move);
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// We copy once the pair from the Elts vector
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EXPECT_EQ(0u, CountCtorCopyAndMove::Copy);
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// Check that the map didn't grow
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EXPECT_EQ(Map.getNumBuckets(), NumBuckets);
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}
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}
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TEST(StringMapCustomTest, BracketOperatorCtor) {
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StringMap<CountCtorCopyAndMove> Map;
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CountCtorCopyAndMove::Ctor = 0;
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Map["abcd"];
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EXPECT_EQ(1u, CountCtorCopyAndMove::Ctor);
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// Test that operator[] does not create a value when it is already in the map
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CountCtorCopyAndMove::Ctor = 0;
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Map["abcd"];
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EXPECT_EQ(0u, CountCtorCopyAndMove::Ctor);
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}
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namespace {
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struct NonMoveableNonCopyableType {
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int Data = 0;
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NonMoveableNonCopyableType() = default;
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|
NonMoveableNonCopyableType(int Data) : Data(Data) {}
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|
NonMoveableNonCopyableType(const NonMoveableNonCopyableType &) = delete;
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|
NonMoveableNonCopyableType(NonMoveableNonCopyableType &&) = delete;
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|
};
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|
}
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|
|
|
// Test that we can "emplace" an element in the map without involving map/move
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|
TEST(StringMapCustomTest, EmplaceTest) {
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|
StringMap<NonMoveableNonCopyableType> Map;
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|
Map.try_emplace("abcd", 42);
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|
EXPECT_EQ(1u, Map.count("abcd"));
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|
EXPECT_EQ(42, Map["abcd"].Data);
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|
}
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|
|
|
// Test that StringMapEntryBase can handle size_t wide sizes.
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|
TEST(StringMapCustomTest, StringMapEntryBaseSize) {
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|
size_t LargeValue;
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|
|
|
// Test that the entry can represent max-unsigned.
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|
if (sizeof(size_t) <= sizeof(unsigned))
|
|
LargeValue = std::numeric_limits<unsigned>::max();
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|
else
|
|
LargeValue = std::numeric_limits<unsigned>::max() + 1ULL;
|
|
StringMapEntryBase LargeBase(LargeValue);
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|
EXPECT_EQ(LargeValue, LargeBase.getKeyLength());
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|
|
|
// Test that the entry can hold at least max size_t.
|
|
LargeValue = std::numeric_limits<size_t>::max();
|
|
StringMapEntryBase LargerBase(LargeValue);
|
|
LargeValue = std::numeric_limits<size_t>::max();
|
|
EXPECT_EQ(LargeValue, LargerBase.getKeyLength());
|
|
}
|
|
|
|
// Test that StringMapEntry can handle size_t wide sizes.
|
|
TEST(StringMapCustomTest, StringMapEntrySize) {
|
|
size_t LargeValue;
|
|
|
|
// Test that the entry can represent max-unsigned.
|
|
if (sizeof(size_t) <= sizeof(unsigned))
|
|
LargeValue = std::numeric_limits<unsigned>::max();
|
|
else
|
|
LargeValue = std::numeric_limits<unsigned>::max() + 1ULL;
|
|
StringMapEntry<int> LargeEntry(LargeValue);
|
|
StringRef Key = LargeEntry.getKey();
|
|
EXPECT_EQ(LargeValue, Key.size());
|
|
|
|
// Test that the entry can hold at least max size_t.
|
|
LargeValue = std::numeric_limits<size_t>::max();
|
|
StringMapEntry<int> LargerEntry(LargeValue);
|
|
Key = LargerEntry.getKey();
|
|
EXPECT_EQ(LargeValue, Key.size());
|
|
}
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|
|
|
} // end anonymous namespace
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