/* Copyright (c) 2017, Google Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
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#include <openssl/buf.h>
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#include <string.h>
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#include <string>
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#include <gtest/gtest.h>
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TEST(BufTest, Basic) {
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bssl::UniquePtr<BUF_MEM> buf(BUF_MEM_new());
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ASSERT_TRUE(buf);
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EXPECT_EQ(0u, buf->length);
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// Use BUF_MEM_reserve to increase buf->max.
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ASSERT_TRUE(BUF_MEM_reserve(buf.get(), 200));
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EXPECT_GE(buf->max, 200u);
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EXPECT_EQ(0u, buf->length);
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// BUF_MEM_reserve with a smaller cap is a no-op.
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size_t old_max = buf->max;
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ASSERT_TRUE(BUF_MEM_reserve(buf.get(), 100));
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EXPECT_EQ(old_max, buf->max);
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EXPECT_EQ(0u, buf->length);
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// BUF_MEM_grow can increase the length without reallocating.
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ASSERT_EQ(100u, BUF_MEM_grow(buf.get(), 100));
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EXPECT_EQ(100u, buf->length);
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EXPECT_EQ(old_max, buf->max);
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memset(buf->data, 'A', buf->length);
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// If BUF_MEM_reserve reallocates, it preserves the contents.
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ASSERT_TRUE(BUF_MEM_reserve(buf.get(), old_max + 1));
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ASSERT_GE(buf->max, old_max + 1);
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EXPECT_EQ(100u, buf->length);
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for (size_t i = 0; i < 100; i++) {
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EXPECT_EQ('A', buf->data[i]);
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}
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// BUF_MEM_grow should zero everything beyond buf->length.
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memset(buf->data, 'B', buf->max);
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ASSERT_EQ(150u, BUF_MEM_grow(buf.get(), 150));
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EXPECT_EQ(150u, buf->length);
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for (size_t i = 0; i < 100; i++) {
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EXPECT_EQ('B', buf->data[i]);
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}
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for (size_t i = 100; i < 150; i++) {
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EXPECT_EQ(0, buf->data[i]);
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}
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// BUF_MEM_grow can rellocate if necessary.
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size_t new_len = buf->max + 1;
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ASSERT_EQ(new_len, BUF_MEM_grow(buf.get(), new_len));
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EXPECT_GE(buf->max, new_len);
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EXPECT_EQ(new_len, buf->length);
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for (size_t i = 0; i < 100; i++) {
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EXPECT_EQ('B', buf->data[i]);
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}
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for (size_t i = 100; i < new_len; i++) {
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EXPECT_EQ(0, buf->data[i]);
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}
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// BUF_MEM_grow can shink.
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ASSERT_EQ(50u, BUF_MEM_grow(buf.get(), 50));
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EXPECT_EQ(50u, buf->length);
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for (size_t i = 0; i < 50; i++) {
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EXPECT_EQ('B', buf->data[i]);
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}
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}
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TEST(BufTest, Append) {
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bssl::UniquePtr<BUF_MEM> buf(BUF_MEM_new());
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ASSERT_TRUE(buf);
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ASSERT_TRUE(BUF_MEM_append(buf.get(), nullptr, 0));
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ASSERT_TRUE(BUF_MEM_append(buf.get(), "hello ", 6));
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ASSERT_TRUE(BUF_MEM_append(buf.get(), nullptr, 0));
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ASSERT_TRUE(BUF_MEM_append(buf.get(), "world", 5));
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std::string str(128, 'A');
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ASSERT_TRUE(BUF_MEM_append(buf.get(), str.data(), str.size()));
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EXPECT_EQ("hello world" + str, std::string(buf->data, buf->length));
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}
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