1 // Copyright 2016 PDFium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "core/fxcrt/string_pool_template.h" 6 #include "core/fxcrt/fx_string.h" 7 #include "testing/gtest/include/gtest/gtest.h" 8 9 namespace fxcrt { 10 11 TEST(StringPool, ByteString) { 12 ByteStringPool pool; 13 14 ByteString null1; 15 ByteString null2; 16 ByteString goats1("goats"); 17 ByteString goats2("goats"); 18 19 // Underlying storage, if non-null, is not shared. 20 EXPECT_EQ(nullptr, null1.m_pData.Get()); 21 EXPECT_EQ(nullptr, null2.m_pData.Get()); 22 EXPECT_NE(goats1.m_pData, goats2.m_pData); 23 24 ByteString interned_null1 = pool.Intern(null1); 25 ByteString interned_null2 = pool.Intern(null2); 26 ByteString interned_goats1 = pool.Intern(goats1); 27 ByteString interned_goats2 = pool.Intern(goats2); 28 29 // Strings are logically equal after being interned. 30 EXPECT_EQ(null1, interned_null1); 31 EXPECT_EQ(null2, interned_null2); 32 EXPECT_EQ(goats1, interned_goats1); 33 EXPECT_EQ(goats2, interned_goats2); 34 35 // Interned underlying storage, if non-null, belongs to first seen. 36 EXPECT_EQ(nullptr, interned_null1.m_pData.Get()); 37 EXPECT_EQ(nullptr, interned_null2.m_pData.Get()); 38 EXPECT_EQ(goats1.m_pData, interned_goats1.m_pData); 39 EXPECT_EQ(goats1.m_pData, interned_goats2.m_pData); 40 41 pool.Clear(); 42 ByteString reinterned_null2 = pool.Intern(null2); 43 ByteString reinterned_null1 = pool.Intern(null2); 44 ByteString reinterned_goats2 = pool.Intern(goats2); 45 ByteString reinterned_goats1 = pool.Intern(goats2); 46 47 // After clearing pool, storage was re-interned using second strings. 48 EXPECT_EQ(nullptr, interned_null1.m_pData.Get()); 49 EXPECT_EQ(nullptr, interned_null2.m_pData.Get()); 50 EXPECT_EQ(goats2.m_pData, reinterned_goats1.m_pData); 51 EXPECT_EQ(goats2.m_pData, reinterned_goats2.m_pData); 52 } 53 54 TEST(StringPool, WideString) { 55 WideStringPool pool; 56 57 WideString null1; 58 WideString null2; 59 WideString goats1(L"goats"); 60 WideString goats2(L"goats"); 61 62 // Underlying storage, if non-null, is not shared. 63 EXPECT_EQ(nullptr, null1.m_pData.Get()); 64 EXPECT_EQ(nullptr, null2.m_pData.Get()); 65 EXPECT_NE(goats1.m_pData, goats2.m_pData); 66 67 WideString interned_null1 = pool.Intern(null1); 68 WideString interned_null2 = pool.Intern(null2); 69 WideString interned_goats1 = pool.Intern(goats1); 70 WideString interned_goats2 = pool.Intern(goats2); 71 72 // Strings are logically equal after being interned. 73 EXPECT_EQ(null1, interned_null1); 74 EXPECT_EQ(null2, interned_null2); 75 EXPECT_EQ(goats1, interned_goats1); 76 EXPECT_EQ(goats2, interned_goats2); 77 78 // Interned underlying storage, if non-null, belongs to first seen. 79 EXPECT_EQ(nullptr, interned_null1.m_pData.Get()); 80 EXPECT_EQ(nullptr, interned_null2.m_pData.Get()); 81 EXPECT_EQ(goats1.m_pData, interned_goats1.m_pData); 82 EXPECT_EQ(goats1.m_pData, interned_goats2.m_pData); 83 84 pool.Clear(); 85 WideString reinterned_null2 = pool.Intern(null2); 86 WideString reinterned_null1 = pool.Intern(null2); 87 WideString reinterned_goats2 = pool.Intern(goats2); 88 WideString reinterned_goats1 = pool.Intern(goats2); 89 90 // After clearing pool, storage was re-interned using second strings. 91 EXPECT_EQ(nullptr, interned_null1.m_pData.Get()); 92 EXPECT_EQ(nullptr, interned_null2.m_pData.Get()); 93 EXPECT_EQ(goats2.m_pData, reinterned_goats1.m_pData); 94 EXPECT_EQ(goats2.m_pData, reinterned_goats2.m_pData); 95 } 96 97 } // namespace fxcrt 98
