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- // Copyright 2017 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #include "base/strings/strcat.h"
- #include "base/strings/utf_string_conversions.h"
- #include "testing/gtest/include/gtest/gtest.h"
- namespace base {
- TEST(StrCat, 8Bit) {
- EXPECT_EQ("", StrCat({""}));
- EXPECT_EQ("1", StrCat({"1"}));
- EXPECT_EQ("122", StrCat({"1", "22"}));
- EXPECT_EQ("122333", StrCat({"1", "22", "333"}));
- EXPECT_EQ("1223334444", StrCat({"1", "22", "333", "4444"}));
- EXPECT_EQ("122333444455555", StrCat({"1", "22", "333", "4444", "55555"}));
- }
- TEST(StrCat, 16Bit) {
- std::u16string arg1 = u"1";
- std::u16string arg2 = u"22";
- std::u16string arg3 = u"333";
- EXPECT_EQ(u"", StrCat({std::u16string()}));
- EXPECT_EQ(u"1", StrCat({arg1}));
- EXPECT_EQ(u"122", StrCat({arg1, arg2}));
- EXPECT_EQ(u"122333", StrCat({arg1, arg2, arg3}));
- }
- TEST(StrAppend, 8Bit) {
- std::string result;
- result = "foo";
- StrAppend(&result, {std::string()});
- EXPECT_EQ("foo", result);
- result = "foo";
- StrAppend(&result, {"1"});
- EXPECT_EQ("foo1", result);
- result = "foo";
- StrAppend(&result, {"1", "22", "333"});
- EXPECT_EQ("foo122333", result);
- }
- TEST(StrAppend, 16Bit) {
- std::u16string arg1 = u"1";
- std::u16string arg2 = u"22";
- std::u16string arg3 = u"333";
- std::u16string result;
- result = u"foo";
- StrAppend(&result, {std::u16string()});
- EXPECT_EQ(u"foo", result);
- result = u"foo";
- StrAppend(&result, {arg1});
- EXPECT_EQ(u"foo1", result);
- result = u"foo";
- StrAppend(&result, {arg1, arg2, arg3});
- EXPECT_EQ(u"foo122333", result);
- }
- TEST(StrAppendT, ReserveAdditionalIfNeeded) {
- std::string str = "foo";
- const char* prev_data = str.data();
- size_t prev_capacity = str.capacity();
- // Fully exhaust current capacity.
- StrAppend(&str, {std::string(str.capacity() - str.size(), 'o')});
- // Expect that we hit capacity, but didn't require a re-alloc.
- EXPECT_EQ(str.capacity(), str.size());
- EXPECT_EQ(prev_data, str.data());
- EXPECT_EQ(prev_capacity, str.capacity());
- // Force a re-alloc by appending another character.
- StrAppend(&str, {"o"});
- // Expect at least 2x growth in capacity.
- EXPECT_LE(2 * prev_capacity, str.capacity());
- }
- } // namespace base
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