universe@530: /*
universe@530:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
universe@530:  *
universe@530:  * Copyright 2021 Mike Becker, Olaf Wintermann All rights reserved.
universe@530:  *
universe@530:  * Redistribution and use in source and binary forms, with or without
universe@530:  * modification, are permitted provided that the following conditions are met:
universe@530:  *
universe@530:  *   1. Redistributions of source code must retain the above copyright
universe@530:  *      notice, this list of conditions and the following disclaimer.
universe@530:  *
universe@530:  *   2. Redistributions in binary form must reproduce the above copyright
universe@530:  *      notice, this list of conditions and the following disclaimer in the
universe@530:  *      documentation and/or other materials provided with the distribution.
universe@530:  *
universe@530:  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
universe@530:  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
universe@530:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
universe@530:  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
universe@530:  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
universe@530:  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
universe@530:  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
universe@530:  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
universe@530:  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
universe@530:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
universe@530:  * POSSIBILITY OF SUCH DAMAGE.
universe@530:  */
universe@530: 
universe@530: #include "cx/buffer.h"
universe@530: 
universe@530: #include <gtest/gtest.h>
universe@530: #include "util_allocator.h"
universe@530: 
universe@539: static void expect_default_flush_config(CxBuffer *buf) {
universe@539:     EXPECT_EQ(buf->flush_blkmax, 0);
universe@539:     EXPECT_EQ(buf->flush_blksize, 4096);
universe@539:     EXPECT_EQ(buf->flush_threshold, SIZE_MAX);
universe@539:     EXPECT_EQ(buf->flush_func, nullptr);
universe@541:     EXPECT_EQ(buf->flush_target, nullptr);
universe@539: }
universe@539: 
universe@535: TEST(BufferInit, WrapSpace) {
universe@535:     CxTestingAllocator alloc;
universe@530:     CxBuffer buf;
universe@535:     void *space = cxMalloc(&alloc, 16);
universe@535:     cxBufferInit(&buf, space, 16, &alloc, CX_BUFFER_DEFAULT);
universe@539:     expect_default_flush_config(&buf);
universe@530:     EXPECT_EQ(buf.space, space);
universe@530:     EXPECT_EQ(buf.flags & CX_BUFFER_AUTO_EXTEND, 0);
universe@530:     EXPECT_EQ(buf.flags & CX_BUFFER_FREE_CONTENTS, 0);
universe@530:     EXPECT_EQ(buf.pos, 0);
universe@530:     EXPECT_EQ(buf.size, 0);
universe@530:     EXPECT_EQ(buf.capacity, 16);
universe@535:     EXPECT_EQ(buf.allocator, &alloc);
universe@530:     cxBufferDestroy(&buf);
universe@535:     EXPECT_FALSE(alloc.verify());
universe@535:     cxFree(&alloc, space);
universe@535:     EXPECT_TRUE(alloc.verify());
universe@530: }
universe@530: 
universe@539: TEST(BufferInit, WrapSpaceAutoExtend) {
universe@539:     CxTestingAllocator alloc;
universe@539:     CxBuffer buf;
universe@539:     void *space = cxMalloc(&alloc, 16);
universe@539:     cxBufferInit(&buf, space, 16, &alloc, CX_BUFFER_AUTO_EXTEND);
universe@539:     expect_default_flush_config(&buf);
universe@539:     EXPECT_EQ(buf.space, space);
universe@539:     EXPECT_EQ(buf.flags & CX_BUFFER_AUTO_EXTEND, CX_BUFFER_AUTO_EXTEND);
universe@539:     EXPECT_EQ(buf.flags & CX_BUFFER_FREE_CONTENTS, 0);
universe@539:     EXPECT_EQ(buf.pos, 0);
universe@539:     EXPECT_EQ(buf.size, 0);
universe@539:     EXPECT_EQ(buf.capacity, 16);
universe@539:     EXPECT_EQ(buf.allocator, &alloc);
universe@539:     cxBufferDestroy(&buf);
universe@539:     EXPECT_FALSE(alloc.verify());
universe@539:     cxFree(&alloc, space);
universe@539:     EXPECT_TRUE(alloc.verify());
universe@539: }
universe@539: 
universe@535: TEST(BufferInit, WrapSpaceAutoFree) {
universe@535:     CxTestingAllocator alloc;
universe@530:     CxBuffer buf;
universe@535:     void *space = cxMalloc(&alloc, 16);
universe@535:     cxBufferInit(&buf, space, 16, &alloc, CX_BUFFER_FREE_CONTENTS);
universe@539:     expect_default_flush_config(&buf);
universe@530:     EXPECT_EQ(buf.space, space);
universe@530:     EXPECT_EQ(buf.flags & CX_BUFFER_AUTO_EXTEND, 0);
universe@530:     EXPECT_EQ(buf.flags & CX_BUFFER_FREE_CONTENTS, CX_BUFFER_FREE_CONTENTS);
universe@530:     EXPECT_EQ(buf.pos, 0);
universe@530:     EXPECT_EQ(buf.size, 0);
universe@530:     EXPECT_EQ(buf.capacity, 16);
universe@535:     EXPECT_EQ(buf.allocator, &alloc);
universe@535:     EXPECT_FALSE(alloc.verify());
universe@530:     cxBufferDestroy(&buf);
universe@535:     EXPECT_TRUE(alloc.verify());
universe@530: }
universe@535: 
universe@535: TEST(BufferInit, FreshSpace) {
universe@535:     CxTestingAllocator alloc;
universe@535:     CxBuffer buf;
universe@535:     cxBufferInit(&buf, nullptr, 8, &alloc, CX_BUFFER_DEFAULT);
universe@539:     expect_default_flush_config(&buf);
universe@535:     EXPECT_NE(buf.space, nullptr);
universe@535:     EXPECT_EQ(buf.flags & CX_BUFFER_AUTO_EXTEND, 0);
universe@535:     EXPECT_EQ(buf.flags & CX_BUFFER_FREE_CONTENTS, CX_BUFFER_FREE_CONTENTS);
universe@535:     EXPECT_EQ(buf.pos, 0);
universe@535:     EXPECT_EQ(buf.size, 0);
universe@535:     EXPECT_EQ(buf.capacity, 8);
universe@535:     EXPECT_EQ(buf.allocator, &alloc);
universe@535:     EXPECT_FALSE(alloc.verify()); // space is still allocated
universe@535:     cxBufferDestroy(&buf);
universe@535:     EXPECT_TRUE(alloc.verify());
universe@535: }
universe@535: 
universe@535: class BufferShiftFixture : public ::testing::Test {
universe@535: protected:
universe@535:     void SetUp() override {
universe@535:         ASSERT_TRUE(alloc.verify());
universe@535:         cxBufferInit(&buf, nullptr, 16, &alloc, CX_BUFFER_DEFAULT);
universe@535:         memcpy(buf.space, "test____________", 16);
universe@535:         buf.capacity = 8; // purposely pretend that the buffer has less capacity s.t. we can test beyond the range
universe@535:         buf.pos = 4;
universe@535:         buf.size = 4;
universe@535:     }
universe@535: 
universe@535:     void TearDown() override {
universe@535:         cxBufferDestroy(&buf);
universe@535:         EXPECT_TRUE(alloc.verify());
universe@535:     }
universe@535: 
universe@535:     CxTestingAllocator alloc;
universe@535:     CxBuffer buf{};
universe@535: };
universe@535: 
universe@535: class BufferShiftLeft : public BufferShiftFixture {
universe@535: };
universe@535: 
universe@535: TEST_F(BufferShiftLeft, Zero) {
universe@535:     ASSERT_EQ(buf.pos, 4);
universe@535:     ASSERT_EQ(buf.size, 4);
universe@535:     int ret = cxBufferShiftLeft(&buf, 0);
universe@535:     EXPECT_EQ(ret, 0);
universe@535:     EXPECT_EQ(buf.pos, 4);
universe@535:     EXPECT_EQ(buf.size, 4);
universe@535:     EXPECT_TRUE(memcmp(buf.space, "test________", 8) == 0);
universe@535: }
universe@535: 
universe@535: TEST_F(BufferShiftLeft, Standard) {
universe@535:     ASSERT_EQ(buf.pos, 4);
universe@535:     ASSERT_EQ(buf.size, 4);
universe@535:     int ret = cxBufferShiftLeft(&buf, 2);
universe@535:     EXPECT_EQ(ret, 0);
universe@535:     EXPECT_EQ(buf.pos, 2);
universe@535:     EXPECT_EQ(buf.size, 2);
universe@535:     EXPECT_TRUE(memcmp(buf.space, "stst________", 8) == 0);
universe@535: }
universe@535: 
universe@535: TEST_F(BufferShiftLeft, Overshift) {
universe@535:     ASSERT_LT(buf.pos, 6);
universe@535:     ASSERT_LT(buf.size, 6);
universe@535:     int ret = cxBufferShiftLeft(&buf, 6);
universe@535:     EXPECT_EQ(ret, 0);
universe@535:     EXPECT_EQ(buf.pos, 0);
universe@535:     EXPECT_EQ(buf.size, 0);
universe@535:     EXPECT_TRUE(memcmp(buf.space, "test________", 8) == 0);
universe@535: }
universe@535: 
universe@535: TEST_F(BufferShiftLeft, OvershiftPosOnly) {
universe@535:     buf.pos = 2;
universe@535:     ASSERT_EQ(buf.size, 4);
universe@535:     int ret = cxBufferShiftLeft(&buf, 3);
universe@535:     EXPECT_EQ(ret, 0);
universe@535:     EXPECT_EQ(buf.pos, 0);
universe@535:     EXPECT_EQ(buf.size, 1);
universe@535:     EXPECT_TRUE(memcmp(buf.space, "test________", 8) == 0);
universe@535: }
universe@535: 
universe@535: TEST_F(BufferShiftLeft, OffsetInterface) {
universe@535:     buf.pos = 3;
universe@535:     ASSERT_EQ(buf.size, 4);
universe@535:     int ret = cxBufferShift(&buf, -2);
universe@535:     EXPECT_EQ(ret, 0);
universe@535:     EXPECT_EQ(buf.pos, 1);
universe@535:     EXPECT_EQ(buf.size, 2);
universe@535:     EXPECT_TRUE(memcmp(buf.space, "stst________", 8) == 0);
universe@535: }
universe@535: 
universe@535: class BufferShiftRight : public BufferShiftFixture {
universe@535: };
universe@535: 
universe@535: TEST_F(BufferShiftRight, Zero) {
universe@535:     ASSERT_EQ(buf.pos, 4);
universe@535:     ASSERT_EQ(buf.size, 4);
universe@535:     int ret = cxBufferShiftRight(&buf, 0);
universe@535:     EXPECT_EQ(ret, 0);
universe@535:     EXPECT_EQ(buf.pos, 4);
universe@535:     EXPECT_EQ(buf.size, 4);
universe@535:     EXPECT_TRUE(memcmp(buf.space, "test________", 8) == 0);
universe@535: }
universe@535: 
universe@535: TEST_F(BufferShiftRight, Standard) {
universe@535:     ASSERT_EQ(buf.pos, 4);
universe@535:     ASSERT_EQ(buf.size, 4);
universe@535:     int ret = cxBufferShiftRight(&buf, 3);
universe@535:     EXPECT_EQ(ret, 0);
universe@535:     EXPECT_EQ(buf.pos, 7);
universe@535:     EXPECT_EQ(buf.size, 7);
universe@535:     EXPECT_TRUE(memcmp(buf.space, "testest_____", 8) == 0);
universe@535: }
universe@535: 
universe@535: TEST_F(BufferShiftRight, OvershiftDiscard) {
universe@535:     ASSERT_EQ(buf.pos, 4);
universe@535:     ASSERT_EQ(buf.size, 4);
universe@535:     ASSERT_EQ(buf.capacity, 8);
universe@535:     int ret = cxBufferShiftRight(&buf, 6);
universe@535:     EXPECT_EQ(ret, 0);
universe@535:     EXPECT_EQ(buf.pos, 8);
universe@535:     EXPECT_EQ(buf.size, 8);
universe@535:     EXPECT_EQ(buf.capacity, 8);
universe@535:     EXPECT_TRUE(memcmp(buf.space, "test__te____", 8) == 0);
universe@535: }
universe@535: 
universe@535: TEST_F(BufferShiftRight, OvershiftExtend) {
universe@535:     ASSERT_EQ(buf.pos, 4);
universe@535:     ASSERT_EQ(buf.size, 4);
universe@535:     ASSERT_EQ(buf.capacity, 8);
universe@535:     buf.flags |= CX_BUFFER_AUTO_EXTEND;
universe@535:     int ret = cxBufferShiftRight(&buf, 6);
universe@535:     EXPECT_EQ(ret, 0);
universe@535:     EXPECT_EQ(buf.pos, 10);
universe@535:     EXPECT_EQ(buf.size, 10);
universe@535:     EXPECT_GE(buf.capacity, 10);
universe@535:     EXPECT_TRUE(memcmp(buf.space, "test__test__", 8) == 0);
universe@535: }
universe@535: 
universe@535: TEST_F(BufferShiftRight, OffsetInterface) {
universe@535:     buf.pos = 3;
universe@535:     ASSERT_EQ(buf.size, 4);
universe@535:     int ret = cxBufferShift(&buf, 2);
universe@535:     EXPECT_EQ(ret, 0);
universe@535:     EXPECT_EQ(buf.pos, 5);
universe@535:     EXPECT_EQ(buf.size, 6);
universe@535:     EXPECT_TRUE(memcmp(buf.space, "tetest______", 8) == 0);
universe@535: }
universe@535: 
universe@535: TEST(BufferMinimumCapacity, Sufficient) {
universe@535:     CxTestingAllocator alloc;
universe@535:     auto space = cxMalloc(&alloc, 8);
universe@535:     CxBuffer buf;
universe@535:     cxBufferInit(&buf, space, 8, &alloc, CX_BUFFER_FREE_CONTENTS);
universe@535:     memcpy(space, "Testing", 8);
universe@535:     buf.size = 8;
universe@535:     cxBufferMinimumCapacity(&buf, 6);
universe@535:     EXPECT_EQ(buf.capacity, 8);
universe@535:     EXPECT_EQ(buf.size, 8);
universe@535:     EXPECT_TRUE(memcmp(buf.space, "Testing", 8) == 0);
universe@535:     cxBufferDestroy(&buf);
universe@535:     EXPECT_TRUE(alloc.verify());
universe@535: }
universe@535: 
universe@535: TEST(BufferMinimumCapacity, Extend) {
universe@535:     CxTestingAllocator alloc;
universe@535:     auto space = cxMalloc(&alloc, 8);
universe@535:     CxBuffer buf;
universe@535:     cxBufferInit(&buf, space, 8, &alloc, CX_BUFFER_FREE_CONTENTS); // NO auto extend!
universe@535:     memcpy(space, "Testing", 8);
universe@535:     buf.size = 8;
universe@535:     cxBufferMinimumCapacity(&buf, 16);
universe@535:     EXPECT_EQ(buf.capacity, 16);
universe@535:     EXPECT_EQ(buf.size, 8);
universe@535:     EXPECT_TRUE(memcmp(buf.space, "Testing", 8) == 0);
universe@535:     cxBufferDestroy(&buf);
universe@535:     EXPECT_TRUE(alloc.verify());
universe@535: }
universe@536: 
universe@536: TEST(BufferClear, Test) {
universe@536:     char space[16];
universe@536:     strcpy(space, "clear test");
universe@536:     CxBuffer buf;
universe@536:     cxBufferInit(&buf, space, 16, cxDefaultAllocator, CX_BUFFER_DEFAULT);
universe@536:     ASSERT_EQ(buf.size, 0);
universe@536:     // only clear the used part of the buffer
universe@536:     cxBufferClear(&buf);
universe@536:     EXPECT_EQ(memcmp(space, "clear test", 10), 0);
universe@536:     buf.size = 5;
universe@536:     buf.pos = 3;
universe@536:     cxBufferClear(&buf);
universe@536:     EXPECT_EQ(memcmp(space, "\0\0\0\0\0 test", 10), 0);
universe@536:     EXPECT_EQ(buf.size, 0);
universe@536:     EXPECT_EQ(buf.pos, 0);
universe@538:     cxBufferDestroy(&buf);
universe@536: }
universe@538: 
universe@538: class BufferWrite : public ::testing::Test {
universe@538: protected:
universe@538:     CxBuffer buf{};
universe@538: 
universe@538:     void SetUp() override {
universe@538:         cxBufferInit(&buf, nullptr, 16, cxDefaultAllocator, CX_BUFFER_DEFAULT);
universe@538:         buf.capacity = 8; // artificially reduce capacity to check OOB writes
universe@538:         memset(buf.space, 0, 16);
universe@538:         memcpy(buf.space, "prep", 4);
universe@538:         buf.size = buf.pos = 4;
universe@538:     }
universe@538: 
universe@538:     void TearDown() override {
universe@538:         cxBufferDestroy(&buf);
universe@538:     }
universe@538: };
universe@538: 
universe@538: TEST_F(BufferWrite, SizeOneFit) {
universe@538:     const char *data = "test";
universe@538:     ASSERT_EQ(buf.capacity, 8);
universe@538:     ASSERT_EQ(buf.pos, 4);
universe@541:     ASSERT_EQ(buf.size, 4);
universe@538:     size_t written = cxBufferWrite(data, 1, 4, &buf);
universe@538:     EXPECT_EQ(written, 4);
universe@538:     EXPECT_EQ(buf.size, 8);
universe@538:     EXPECT_EQ(buf.pos, 8);
universe@538:     EXPECT_EQ(buf.capacity, 8);
universe@538:     EXPECT_EQ(memcmp(buf.space, "preptest", 8), 0);
universe@538: }
universe@538: 
universe@538: TEST_F(BufferWrite, SizeOneDiscard) {
universe@538:     const char *data = "testing";
universe@538:     ASSERT_EQ(buf.capacity, 8);
universe@538:     ASSERT_EQ(buf.pos, 4);
universe@541:     ASSERT_EQ(buf.size, 4);
universe@538:     size_t written = cxBufferWrite(data, 1, 7, &buf);
universe@538:     EXPECT_EQ(written, 4);
universe@538:     EXPECT_EQ(buf.size, 8);
universe@538:     EXPECT_EQ(buf.pos, 8);
universe@538:     EXPECT_EQ(buf.capacity, 8);
universe@538:     EXPECT_EQ(memcmp(buf.space, "preptest\0", 9), 0);
universe@538: }
universe@538: 
universe@538: TEST_F(BufferWrite, SizeOneExtend) {
universe@538:     buf.flags |= CX_BUFFER_AUTO_EXTEND;
universe@538:     const char *data = "testing";
universe@538:     ASSERT_EQ(buf.capacity, 8);
universe@538:     ASSERT_EQ(buf.pos, 4);
universe@541:     ASSERT_EQ(buf.size, 4);
universe@538:     size_t written = cxBufferWrite(data, 1, 7, &buf);
universe@538:     EXPECT_EQ(written, 7);
universe@538:     EXPECT_EQ(buf.size, 11);
universe@538:     EXPECT_EQ(buf.pos, 11);
universe@538:     EXPECT_GE(buf.capacity, 11);
universe@538:     EXPECT_EQ(memcmp(buf.space, "preptesting", 11), 0);
universe@538: }
universe@538: 
universe@538: TEST_F(BufferWrite, MultibyteFit) {
universe@541:     const char *data = "test";
universe@541:     ASSERT_EQ(buf.capacity, 8);
universe@541:     ASSERT_EQ(buf.pos, 4);
universe@541:     ASSERT_EQ(buf.size, 4);
universe@541:     size_t written = cxBufferWrite(data, 2, 2, &buf);
universe@541:     EXPECT_EQ(written, 2);
universe@541:     EXPECT_EQ(buf.size, 8);
universe@541:     EXPECT_EQ(buf.pos, 8);
universe@541:     EXPECT_EQ(buf.capacity, 8);
universe@541:     EXPECT_EQ(memcmp(buf.space, "preptest", 8), 0);
universe@538: }
universe@538: 
universe@538: TEST_F(BufferWrite, MultibyteDiscard) {
universe@542:     const char *data = "testing";
universe@541:     ASSERT_EQ(buf.capacity, 8);
universe@541:     ASSERT_EQ(buf.size, 4);
universe@541:     buf.pos = 3;
universe@542:     size_t written = cxBufferWrite(data, 2, 4, &buf);
universe@538:     // remember: whole elements are discarded if they do not fit
universe@541:     EXPECT_EQ(written, 2);
universe@541:     EXPECT_EQ(buf.size, 7);
universe@541:     EXPECT_EQ(buf.pos, 7);
universe@541:     EXPECT_EQ(buf.capacity, 8);
universe@541:     EXPECT_EQ(memcmp(buf.space, "pretest\0", 8), 0);
universe@538: }
universe@538: 
universe@538: TEST_F(BufferWrite, MultibyteExtend) {
universe@541:     buf.flags |= CX_BUFFER_AUTO_EXTEND;
universe@541:     const char *data = "tester";
universe@541:     ASSERT_EQ(buf.capacity, 8);
universe@541:     ASSERT_EQ(buf.size, 4);
universe@541:     buf.pos = 3;
universe@541:     size_t written = cxBufferWrite(data, 2, 3, &buf);
universe@541:     // remember: whole elements are discarded if they do not fit
universe@541:     EXPECT_EQ(written, 3);
universe@541:     EXPECT_EQ(buf.size, 9);
universe@541:     EXPECT_EQ(buf.pos, 9);
universe@541:     EXPECT_GE(buf.capacity, 9);
universe@541:     EXPECT_EQ(memcmp(buf.space, "pretester\0", 10), 0);
universe@538: }
universe@538: 
universe@538: TEST_F(BufferWrite, PutcWrapperFit) {
universe@541:     ASSERT_EQ(buf.capacity, 8);
universe@541:     ASSERT_EQ(buf.pos, 4);
universe@541:     ASSERT_EQ(buf.size, 4);
universe@541:     int c = cxBufferPut(&buf, 0x20 | 'a');
universe@541:     EXPECT_EQ(c, 'a');
universe@541:     EXPECT_EQ(buf.size, 5);
universe@541:     EXPECT_EQ(buf.pos, 5);
universe@541:     EXPECT_EQ(buf.capacity, 8);
universe@541:     EXPECT_EQ(memcmp(buf.space, "prepa\0", 6), 0);
universe@538: }
universe@538: 
universe@538: TEST_F(BufferWrite, PutcWrapperDiscard) {
universe@541:     ASSERT_EQ(buf.capacity, 8);
universe@541:     ASSERT_EQ(buf.size, 4);
universe@541:     buf.pos = 8;
universe@541:     int c = cxBufferPut(&buf, 0x20 | 'a');
universe@541:     EXPECT_EQ(c, EOF);
universe@541:     EXPECT_EQ(buf.size, 4);
universe@541:     EXPECT_EQ(buf.pos, 8);
universe@541:     EXPECT_EQ(buf.capacity, 8);
universe@541:     EXPECT_EQ(memcmp(buf.space, "prep\0\0\0\0\0", 9), 0);
universe@538: }
universe@538: 
universe@538: TEST_F(BufferWrite, PutcWrapperExtend) {
universe@541:     buf.flags |= CX_BUFFER_AUTO_EXTEND;
universe@541:     ASSERT_EQ(buf.capacity, 8);
universe@541:     ASSERT_EQ(buf.size, 4);
universe@541:     buf.pos = 8;
universe@541:     int c = cxBufferPut(&buf, 0x20 | 'a');
universe@541:     EXPECT_EQ(c, 'a');
universe@541:     EXPECT_EQ(buf.size, 9);
universe@541:     EXPECT_EQ(buf.pos, 9);
universe@541:     EXPECT_GE(buf.capacity, 9);
universe@541:     EXPECT_EQ(memcmp(buf.space, "prep\0\0\0\0a\0", 10), 0);
universe@538: }
universe@538: 
universe@538: TEST_F(BufferWrite, PutStringWrapperFit) {
universe@541:     const char *data = "test";
universe@541:     ASSERT_EQ(buf.capacity, 8);
universe@541:     ASSERT_EQ(buf.pos, 4);
universe@541:     ASSERT_EQ(buf.size, 4);
universe@541:     size_t written = cxBufferPutString(&buf, data);
universe@541:     EXPECT_EQ(written, 4);
universe@541:     EXPECT_EQ(buf.size, 8);
universe@541:     EXPECT_EQ(buf.pos, 8);
universe@541:     EXPECT_EQ(buf.capacity, 8);
universe@541:     EXPECT_EQ(memcmp(buf.space, "preptest", 8), 0);
universe@538: }
universe@538: 
universe@538: TEST_F(BufferWrite, PutStringWrapperDiscard) {
universe@541:     const char *data = "testing";
universe@541:     ASSERT_EQ(buf.capacity, 8);
universe@541:     ASSERT_EQ(buf.pos, 4);
universe@541:     ASSERT_EQ(buf.size, 4);
universe@541:     size_t written = cxBufferPutString(&buf, data);
universe@541:     EXPECT_EQ(written, 4);
universe@541:     EXPECT_EQ(buf.size, 8);
universe@541:     EXPECT_EQ(buf.pos, 8);
universe@541:     EXPECT_EQ(buf.capacity, 8);
universe@541:     EXPECT_EQ(memcmp(buf.space, "preptest\0", 9), 0);
universe@538: }
universe@538: 
universe@538: TEST_F(BufferWrite, PutStringWrapperExtend) {
universe@541:     buf.flags |= CX_BUFFER_AUTO_EXTEND;
universe@541:     const char *data = "testing";
universe@541:     ASSERT_EQ(buf.capacity, 8);
universe@541:     ASSERT_EQ(buf.pos, 4);
universe@541:     ASSERT_EQ(buf.size, 4);
universe@541:     size_t written = cxBufferPutString(&buf, data);
universe@541:     EXPECT_EQ(written, 7);
universe@541:     EXPECT_EQ(buf.size, 11);
universe@541:     EXPECT_EQ(buf.pos, 11);
universe@541:     EXPECT_GE(buf.capacity, 11);
universe@541:     EXPECT_EQ(memcmp(buf.space, "preptesting", 11), 0);
universe@541: }
universe@538: 
universe@541: TEST_F(BufferWrite, MultOverflow) {
universe@541:     const char *data = "testing";
universe@541:     ASSERT_EQ(buf.capacity, 8);
universe@541:     ASSERT_EQ(buf.pos, 4);
universe@541:     ASSERT_EQ(buf.size, 4);
universe@541:     size_t written = cxBufferWrite(data, 8, SIZE_MAX / 4, &buf);
universe@541:     EXPECT_EQ(written, 0);
universe@541:     EXPECT_EQ(buf.capacity, 8);
universe@541:     EXPECT_EQ(buf.pos, 4);
universe@541:     EXPECT_EQ(buf.size, 4);
universe@541:     EXPECT_EQ(memcmp(buf.space, "prep\0", 5), 0);
universe@538: }
universe@541: 
universe@541: TEST_F(BufferWrite, MaxCapaOverflow) {
universe@541:     buf.flags |= CX_BUFFER_AUTO_EXTEND;
universe@541:     const char *data = "testing";
universe@541:     ASSERT_EQ(buf.capacity, 8);
universe@541:     ASSERT_EQ(buf.pos, 4);
universe@541:     ASSERT_EQ(buf.size, 4);
universe@541:     size_t written = cxBufferWrite(data, 1, SIZE_MAX - 2, &buf);
universe@541:     EXPECT_EQ(written, 0);
universe@541:     EXPECT_EQ(buf.capacity, 8);
universe@541:     EXPECT_EQ(buf.pos, 4);
universe@541:     EXPECT_EQ(buf.size, 4);
universe@541:     EXPECT_EQ(memcmp(buf.space, "prep\0", 5), 0);
universe@541: }
universe@541: 
universe@541: TEST_F(BufferWrite, OnlyOverwrite) {
universe@541:     buf.flags |= CX_BUFFER_AUTO_EXTEND;
universe@541:     ASSERT_EQ(buf.capacity, 8);
universe@541:     memcpy(buf.space, "preptest", 8);
universe@541:     buf.pos = 3;
universe@541:     buf.size = 8;
universe@541:     size_t written = cxBufferWrite("XXX", 2, 2, &buf);
universe@541:     EXPECT_EQ(written, 2);
universe@541:     EXPECT_EQ(buf.capacity, 8);
universe@541:     EXPECT_EQ(buf.size, 8);
universe@541:     EXPECT_EQ(buf.pos, 7);
universe@541:     EXPECT_EQ(memcmp(buf.space, "preXXX\0t", 8), 0);
universe@541: }