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