DenseMapTest.cpp revision e5c7bc65c30feabed5f05eecee1ff1433e35d381 
1//===- llvm/unittest/ADT/DenseMapMap.cpp - DenseMap unit tests --*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#include "gtest/gtest.h"
11#include "llvm/ADT/DenseMap.h"
12#include <map>
13
14using namespace llvm;
15
16namespace {
17
18// Test fixture
19template <typename T>
20class DenseMapTest : public testing::Test {
21protected:
22  T Map;
23
24  typename T::key_type getKey(int i = 0);
25  typename T::mapped_type getValue(int i = 0);
26};
27
28template <>
29uint32_t DenseMapTest<DenseMap<uint32_t, uint32_t> >::getKey(int i) {
30  return i;
31}
32
33template <>
34uint32_t DenseMapTest<DenseMap<uint32_t, uint32_t> >::getValue(int i) {
35  return 42 + i;
36}
37
38template <>
39uint32_t *DenseMapTest<DenseMap<uint32_t *, uint32_t *> >::getKey(int i) {
40  static uint32_t dummy_arr1[8192];
41  assert(i < 8192 && "Only support 8192 dummy keys.");
42  return &dummy_arr1[i];
43}
44
45template <>
46uint32_t *DenseMapTest<DenseMap<uint32_t *, uint32_t *> >::getValue(int i) {
47  static uint32_t dummy_arr2[8192];
48  assert(i < 8192 && "Only support 8192 dummy values.");
49  return &dummy_arr2[i];
50}
51
52// Register these types for testing.
53typedef ::testing::Types<DenseMap<uint32_t, uint32_t>,
54                         DenseMap<uint32_t *, uint32_t *> > DenseMapTestTypes;
55TYPED_TEST_CASE(DenseMapTest, DenseMapTestTypes);
56
57// Empty map tests
58TYPED_TEST(DenseMapTest, EmptyIntMapTest) {
59  // Size tests
60  EXPECT_EQ(0u, this->Map.size());
61  EXPECT_TRUE(this->Map.empty());
62
63  // Iterator tests
64  EXPECT_TRUE(this->Map.begin() == this->Map.end());
65
66  // Lookup tests
67  EXPECT_FALSE(this->Map.count(this->getKey()));
68  EXPECT_TRUE(this->Map.find(this->getKey()) == this->Map.end());
69  EXPECT_EQ(typename TypeParam::mapped_type(),
70            this->Map.lookup(this->getKey()));
71}
72
73// Constant map tests
74TYPED_TEST(DenseMapTest, ConstEmptyMapTest) {
75  const TypeParam &ConstMap = this->Map;
76  EXPECT_EQ(0u, ConstMap.size());
77  EXPECT_TRUE(ConstMap.empty());
78  EXPECT_TRUE(ConstMap.begin() == ConstMap.end());
79}
80
81// A map with a single entry
82TYPED_TEST(DenseMapTest, SingleEntryMapTest) {
83  this->Map[this->getKey()] = this->getValue();
84
85  // Size tests
86  EXPECT_EQ(1u, this->Map.size());
87  EXPECT_FALSE(this->Map.begin() == this->Map.end());
88  EXPECT_FALSE(this->Map.empty());
89
90  // Iterator tests
91  typename TypeParam::iterator it = this->Map.begin();
92  EXPECT_EQ(this->getKey(), it->first);
93  EXPECT_EQ(this->getValue(), it->second);
94  ++it;
95  EXPECT_TRUE(it == this->Map.end());
96
97  // Lookup tests
98  EXPECT_TRUE(this->Map.count(this->getKey()));
99  EXPECT_TRUE(this->Map.find(this->getKey()) == this->Map.begin());
100  EXPECT_EQ(this->getValue(), this->Map.lookup(this->getKey()));
101  EXPECT_EQ(this->getValue(), this->Map[this->getKey()]);
102}
103
104// Test clear() method
105TYPED_TEST(DenseMapTest, ClearTest) {
106  this->Map[this->getKey()] = this->getValue();
107  this->Map.clear();
108
109  EXPECT_EQ(0u, this->Map.size());
110  EXPECT_TRUE(this->Map.empty());
111  EXPECT_TRUE(this->Map.begin() == this->Map.end());
112}
113
114// Test erase(iterator) method
115TYPED_TEST(DenseMapTest, EraseTest) {
116  this->Map[this->getKey()] = this->getValue();
117  this->Map.erase(this->Map.begin());
118
119  EXPECT_EQ(0u, this->Map.size());
120  EXPECT_TRUE(this->Map.empty());
121  EXPECT_TRUE(this->Map.begin() == this->Map.end());
122}
123
124// Test erase(value) method
125TYPED_TEST(DenseMapTest, EraseTest2) {
126  this->Map[this->getKey()] = this->getValue();
127  this->Map.erase(this->getKey());
128
129  EXPECT_EQ(0u, this->Map.size());
130  EXPECT_TRUE(this->Map.empty());
131  EXPECT_TRUE(this->Map.begin() == this->Map.end());
132}
133
134// Test insert() method
135TYPED_TEST(DenseMapTest, InsertTest) {
136  this->Map.insert(std::make_pair(this->getKey(), this->getValue()));
137  EXPECT_EQ(1u, this->Map.size());
138  EXPECT_EQ(this->getValue(), this->Map[this->getKey()]);
139}
140
141// Test copy constructor method
142TYPED_TEST(DenseMapTest, CopyConstructorTest) {
143  this->Map[this->getKey()] = this->getValue();
144  TypeParam copyMap(this->Map);
145
146  EXPECT_EQ(1u, copyMap.size());
147  EXPECT_EQ(this->getValue(), copyMap[this->getKey()]);
148}
149
150// Test assignment operator method
151TYPED_TEST(DenseMapTest, AssignmentTest) {
152  this->Map[this->getKey()] = this->getValue();
153  TypeParam copyMap = this->Map;
154
155  EXPECT_EQ(1u, copyMap.size());
156  EXPECT_EQ(this->getValue(), copyMap[this->getKey()]);
157}
158
159// A more complex iteration test
160TYPED_TEST(DenseMapTest, IterationTest) {
161  bool visited[100];
162  std::map<typename TypeParam::key_type, unsigned> visitedIndex;
163
164  // Insert 100 numbers into the map
165  for (int i = 0; i < 100; ++i) {
166    visited[i] = false;
167    visitedIndex[this->getKey(i)] = i;
168
169    this->Map[this->getKey(i)] = this->getValue(i);
170  }
171
172  // Iterate over all numbers and mark each one found.
173  for (typename TypeParam::iterator it = this->Map.begin();
174       it != this->Map.end(); ++it)
175    visited[visitedIndex[it->first]] = true;
176
177  // Ensure every number was visited.
178  for (int i = 0; i < 100; ++i)
179    ASSERT_TRUE(visited[i]) << "Entry #" << i << " was never visited";
180}
181
182// const_iterator test
183TYPED_TEST(DenseMapTest, ConstIteratorTest) {
184  // Check conversion from iterator to const_iterator.
185  typename TypeParam::iterator it = this->Map.begin();
186  typename TypeParam::const_iterator cit(it);
187  EXPECT_TRUE(it == cit);
188
189  // Check copying of const_iterators.
190  typename TypeParam::const_iterator cit2(cit);
191  EXPECT_TRUE(cit == cit2);
192}
193
194// Key traits that allows lookup with either an unsigned or char* key;
195// In the latter case, "a" == 0, "b" == 1 and so on.
196struct TestDenseMapInfo {
197  static inline unsigned getEmptyKey() { return ~0; }
198  static inline unsigned getTombstoneKey() { return ~0U - 1; }
199  static unsigned getHashValue(const unsigned& Val) { return Val * 37U; }
200  static unsigned getHashValue(const char* Val) {
201    return (unsigned)(Val[0] - 'a') * 37U;
202  }
203  static bool isEqual(const unsigned& LHS, const unsigned& RHS) {
204    return LHS == RHS;
205  }
206  static bool isEqual(const char* LHS, const unsigned& RHS) {
207    return (unsigned)(LHS[0] - 'a') == RHS;
208  }
209};
210
211// find_as() tests
212TEST(DenseMapCustomTest, FindAsTest) {
213  DenseMap<unsigned, unsigned, TestDenseMapInfo> map;
214  map[0] = 1;
215  map[1] = 2;
216  map[2] = 3;
217
218  // Size tests
219  EXPECT_EQ(3u, map.size());
220
221  // Normal lookup tests
222  EXPECT_EQ(1, map.count(1));
223  EXPECT_EQ(1u, map.find(0)->second);
224  EXPECT_EQ(2u, map.find(1)->second);
225  EXPECT_EQ(3u, map.find(2)->second);
226  EXPECT_TRUE(map.find(3) == map.end());
227
228  // find_as() tests
229  EXPECT_EQ(1u, map.find_as("a")->second);
230  EXPECT_EQ(2u, map.find_as("b")->second);
231  EXPECT_EQ(3u, map.find_as("c")->second);
232  EXPECT_TRUE(map.find_as("d") == map.end());
233}
234
235}
236