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@548: class BufferFixture : public ::testing::Test {
universe@548: protected:
universe@548:     void SetUp() override {
universe@548:         cxBufferInit(&buf, nullptr, 16, cxDefaultAllocator, CX_BUFFER_DEFAULT);
universe@548:         buf.size = 6;
universe@548:         buf.pos = 3;
universe@548:     }
universe@548: 
universe@548:     void TearDown() override {
universe@548:         cxBufferDestroy(&buf);
universe@548:     }
universe@548: 
universe@548:     CxBuffer buf{};
universe@548: };
universe@548: 
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@683: TEST(BufferInit, OnHeap) {
universe@683:     CxTestingAllocator alloc;
universe@683:     CxBuffer *buf;
universe@683:     void *space = cxMalloc(&alloc, 16);
universe@683:     buf = cxBufferCreate(space, 16, &alloc, CX_BUFFER_FREE_CONTENTS);
universe@683:     EXPECT_NE(buf, nullptr);
universe@683:     expect_default_flush_config(buf);
universe@683:     EXPECT_EQ(buf->space, space);
universe@683:     EXPECT_EQ(buf->flags & CX_BUFFER_AUTO_EXTEND, 0);
universe@683:     EXPECT_EQ(buf->flags & CX_BUFFER_FREE_CONTENTS, CX_BUFFER_FREE_CONTENTS);
universe@683:     EXPECT_EQ(buf->pos, 0);
universe@683:     EXPECT_EQ(buf->size, 0);
universe@683:     EXPECT_EQ(buf->capacity, 16);
universe@683:     EXPECT_EQ(buf->allocator, &alloc);
universe@683:     cxBufferFree(buf);
universe@683:     EXPECT_TRUE(alloc.verify());
universe@683: }
universe@683: 
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@547: TEST_F(BufferShiftLeft, ZeroOffsetInterface) {
universe@547:     ASSERT_EQ(buf.pos, 4);
universe@547:     ASSERT_EQ(buf.size, 4);
universe@547:     int ret = cxBufferShift(&buf, -0);
universe@547:     EXPECT_EQ(ret, 0);
universe@547:     EXPECT_EQ(buf.pos, 4);
universe@547:     EXPECT_EQ(buf.size, 4);
universe@547:     EXPECT_TRUE(memcmp(buf.space, "test________", 8) == 0);
universe@547: }
universe@547: 
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@547: TEST_F(BufferShiftRight, ZeroOffsetInterface) {
universe@547:     ASSERT_EQ(buf.pos, 4);
universe@547:     ASSERT_EQ(buf.size, 4);
universe@547:     int ret = cxBufferShift(&buf, +0);
universe@547:     EXPECT_EQ(ret, 0);
universe@547:     EXPECT_EQ(buf.pos, 4);
universe@547:     EXPECT_EQ(buf.size, 4);
universe@547:     EXPECT_TRUE(memcmp(buf.space, "test________", 8) == 0);
universe@547: }
universe@547: 
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@761: TEST(BufferReset, Test) {
universe@761:     char space[16];
universe@761:     strcpy(space, "reset test");
universe@761:     CxBuffer buf;
universe@761:     cxBufferInit(&buf, space, 16, cxDefaultAllocator, CX_BUFFER_DEFAULT);
universe@761:     buf.size = 5;
universe@761:     buf.pos = 3;
universe@761:     cxBufferReset(&buf);
universe@761:     EXPECT_EQ(memcmp(space, "reset test", 10), 0);
universe@761:     EXPECT_EQ(buf.size, 0);
universe@761:     EXPECT_EQ(buf.pos, 0);
universe@761:     cxBufferDestroy(&buf);
universe@761: }
universe@761: 
universe@538: class BufferWrite : public ::testing::Test {
universe@538: protected:
universe@545:     CxBuffer buf{}, target{};
universe@538: 
universe@538:     void SetUp() override {
universe@545:         cxBufferInit(&target, nullptr, 16, cxDefaultAllocator, CX_BUFFER_AUTO_EXTEND);
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@545:         cxBufferDestroy(&target);
universe@545:     }
universe@545: 
universe@545:     void enableFlushing() {
universe@545:         buf.flush_target = &target;
universe@545:         buf.flush_func = reinterpret_cast<cx_write_func>(cxBufferWrite);
universe@545:         buf.flush_blkmax = 1;
universe@538:     }
universe@538: };
universe@538: 
universe@567: static size_t mock_write_limited_rate(
universe@567:         void const *ptr,
universe@567:         size_t size,
universe@567:         __attribute__((unused)) size_t nitems,
universe@567:         CxBuffer *buffer
universe@567: ) {
universe@567:     // simulate limited target drain capacity
universe@567:     static bool full = false;
universe@567:     if (full) {
universe@567:         full = false;
universe@567:         return 0;
universe@567:     } else {
universe@567:         full = true;
universe@567:         return cxBufferWrite(ptr, size, nitems > 2 ? 2 : nitems, buffer);
universe@567:     }
universe@567: }
universe@567: 
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@566:     EXPECT_EQ(memcmp(buf.space, "pretester", 9), 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@565:     int c = cxBufferPut(&buf, 0x200 | '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@565:     int c = cxBufferPut(&buf, 0x200 | '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@565:     int c = cxBufferPut(&buf, 0x200 | '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@566:     EXPECT_EQ(memcmp(buf.space, "prep\0\0\0\0a", 9), 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: }
universe@545: 
universe@545: TEST_F(BufferWrite, FlushAtCapacity) {
universe@545:     enableFlushing();
universe@545:     ASSERT_EQ(buf.capacity, 8);
universe@545:     ASSERT_EQ(buf.pos, 4);
universe@545:     size_t written = cxBufferWrite("foo", 1, 3, &buf);
universe@545:     EXPECT_EQ(written, 3);
universe@545:     ASSERT_EQ(buf.pos, 7);
universe@545:     ASSERT_EQ(buf.size, 7);
universe@545:     ASSERT_EQ(target.pos, 0);
universe@545:     ASSERT_EQ(target.size, 0);
universe@545:     written = cxBufferWrite("hello", 1, 5, &buf);
universe@545:     EXPECT_EQ(written, 5);
universe@545:     EXPECT_EQ(buf.pos, 0);
universe@545:     EXPECT_EQ(buf.size, 0);
universe@545:     EXPECT_EQ(buf.capacity, 8);
universe@545:     EXPECT_EQ(target.pos, 12);
universe@545:     ASSERT_EQ(target.size, 12);
universe@545:     EXPECT_EQ(memcmp(target.space, "prepfoohello", 12), 0);
universe@545: }
universe@546: 
universe@546: TEST_F(BufferWrite, FlushAtThreshold) {
universe@546:     enableFlushing();
universe@546:     buf.flush_threshold = 12;
universe@546:     buf.flags |= CX_BUFFER_AUTO_EXTEND;
universe@546:     ASSERT_EQ(buf.capacity, 8);
universe@546:     ASSERT_EQ(buf.pos, 4);
universe@546:     size_t written = cxBufferWrite("foobar", 1, 6, &buf);
universe@546:     EXPECT_EQ(written, 6);
universe@546:     ASSERT_EQ(buf.pos, 10);
universe@546:     ASSERT_EQ(buf.size, 10);
universe@546:     ASSERT_GE(buf.capacity, 10);
universe@546:     ASSERT_LE(buf.capacity, 12);
universe@546:     ASSERT_EQ(target.pos, 0);
universe@546:     ASSERT_EQ(target.size, 0);
universe@546:     written = cxBufferWrite("hello", 1, 5, &buf);
universe@546:     EXPECT_EQ(written, 5);
universe@546:     EXPECT_EQ(buf.pos, 0);
universe@546:     EXPECT_EQ(buf.size, 0);
universe@546:     EXPECT_LE(buf.capacity, 12);
universe@546:     EXPECT_EQ(target.pos, 15);
universe@546:     ASSERT_EQ(target.size, 15);
universe@546:     EXPECT_EQ(memcmp(target.space, "prepfoobarhello", 15), 0);
universe@546: }
universe@547: 
universe@567: TEST_F(BufferWrite, FlushRateLimited) {
universe@567:     enableFlushing();
universe@567:     // limit the rate of the flush function and the capacity of the target
universe@567:     target.capacity = 16;
universe@567:     target.flags &= ~CX_BUFFER_AUTO_EXTEND;
universe@567:     buf.flush_func = (cx_write_func) mock_write_limited_rate;
universe@567:     ASSERT_EQ(buf.capacity, 8);
universe@567:     ASSERT_EQ(buf.pos, 4);
universe@567:     size_t written = cxBufferWrite("foo", 1, 3, &buf);
universe@567:     EXPECT_EQ(written, 3);
universe@567:     ASSERT_EQ(buf.pos, 7);
universe@567:     ASSERT_EQ(buf.size, 7);
universe@567:     ASSERT_EQ(target.pos, 0);
universe@567:     ASSERT_EQ(target.size, 0);
universe@567:     written = cxBufferWrite("hello, world!", 1, 13, &buf);
universe@567:     // " world!" fits into this buffer, the remaining stuff is flushed out
universe@567:     EXPECT_EQ(written, 13);
universe@567:     EXPECT_EQ(buf.pos, 7);
universe@567:     EXPECT_EQ(buf.size, 7);
universe@567:     EXPECT_EQ(buf.capacity, 8);
universe@567:     EXPECT_EQ(memcmp(buf.space, " world!", 7), 0);
universe@567:     EXPECT_EQ(target.pos, 13);
universe@567:     ASSERT_EQ(target.size, 13);
universe@567:     EXPECT_EQ(target.capacity, 16);
universe@567:     EXPECT_EQ(memcmp(target.space, "prepfoohello,", 13), 0);
universe@567: }
universe@567: 
universe@548: class BufferSeek : public BufferFixture {
universe@547: };
universe@547: 
universe@547: TEST_F(BufferSeek, SetZero) {
universe@547:     int result = cxBufferSeek(&buf, 0, SEEK_SET);
universe@547:     EXPECT_EQ(result, 0);
universe@547:     EXPECT_EQ(buf.pos, 0);
universe@547: }
universe@547: 
universe@547: TEST_F(BufferSeek, SetValid) {
universe@547:     int result = cxBufferSeek(&buf, 5, SEEK_SET);
universe@547:     EXPECT_EQ(result, 0);
universe@547:     EXPECT_EQ(buf.pos, 5);
universe@547: }
universe@547: 
universe@547: TEST_F(BufferSeek, SetInvalid) {
universe@547:     ASSERT_EQ(buf.pos, 3);
universe@547:     int result = cxBufferSeek(&buf, 6, SEEK_SET);
universe@547:     EXPECT_NE(result, 0);
universe@547:     EXPECT_EQ(buf.pos, 3);
universe@547: }
universe@547: 
universe@547: TEST_F(BufferSeek, CurZero) {
universe@547:     ASSERT_EQ(buf.pos, 3);
universe@547:     int result = cxBufferSeek(&buf, 0, SEEK_CUR);
universe@547:     EXPECT_EQ(result, 0);
universe@547:     EXPECT_EQ(buf.pos, 3);
universe@547: }
universe@547: 
universe@547: TEST_F(BufferSeek, CurValidPositive) {
universe@547:     ASSERT_EQ(buf.pos, 3);
universe@547:     int result = cxBufferSeek(&buf, 2, SEEK_CUR);
universe@547:     EXPECT_EQ(result, 0);
universe@547:     EXPECT_EQ(buf.pos, 5);
universe@547: }
universe@547: 
universe@547: TEST_F(BufferSeek, CurValidNegative) {
universe@547:     ASSERT_EQ(buf.pos, 3);
universe@547:     int result = cxBufferSeek(&buf, -3, SEEK_CUR);
universe@547:     EXPECT_EQ(result, 0);
universe@547:     EXPECT_EQ(buf.pos, 0);
universe@547: }
universe@547: 
universe@547: TEST_F(BufferSeek, CurInvalidPositive) {
universe@547:     ASSERT_EQ(buf.pos, 3);
universe@547:     int result = cxBufferSeek(&buf, 3, SEEK_CUR);
universe@547:     EXPECT_NE(result, 0);
universe@547:     EXPECT_EQ(buf.pos, 3);
universe@547: }
universe@547: 
universe@547: TEST_F(BufferSeek, CurInvalidNegative) {
universe@547:     ASSERT_EQ(buf.pos, 3);
universe@547:     int result = cxBufferSeek(&buf, -4, SEEK_CUR);
universe@547:     EXPECT_NE(result, 0);
universe@547:     EXPECT_EQ(buf.pos, 3);
universe@547: }
universe@547: 
universe@547: TEST_F(BufferSeek, EndZero) {
universe@547:     ASSERT_EQ(buf.size, 6);
universe@547:     int result = cxBufferSeek(&buf, 0, SEEK_END);
universe@547:     // the (past-the-)end position is always invalid
universe@547:     EXPECT_NE(result, 0);
universe@547:     EXPECT_EQ(buf.pos, 3);
universe@547: }
universe@547: 
universe@547: TEST_F(BufferSeek, EndValid) {
universe@547:     ASSERT_EQ(buf.size, 6);
universe@547:     int result = cxBufferSeek(&buf, -6, SEEK_END);
universe@547:     EXPECT_EQ(result, 0);
universe@547:     EXPECT_EQ(buf.pos, 0);
universe@547: }
universe@547: 
universe@547: TEST_F(BufferSeek, EndInvalid) {
universe@547:     ASSERT_EQ(buf.size, 6);
universe@547:     int result = cxBufferSeek(&buf, 1, SEEK_END);
universe@547:     EXPECT_NE(result, 0);
universe@547:     EXPECT_EQ(buf.pos, 3);
universe@547: }
universe@547: 
universe@547: TEST_F(BufferSeek, WhenceInvalid) {
universe@547:     ASSERT_EQ(buf.size, 6);
universe@547:     ASSERT_EQ(buf.pos, 3);
universe@547:     int result = cxBufferSeek(&buf, 2, 9000);
universe@547:     EXPECT_NE(result, 0);
universe@547:     EXPECT_EQ(buf.size, 6);
universe@547:     EXPECT_EQ(buf.pos, 3);
universe@548: }
universe@548: 
universe@548: class BufferEof : public BufferFixture {
universe@548: };
universe@548: 
universe@548: TEST_F(BufferEof, Reached) {
universe@548:     buf.pos = buf.size;
universe@548:     EXPECT_TRUE(cxBufferEof(&buf));
universe@548:     buf.pos = buf.size - 1;
universe@548:     ASSERT_FALSE(cxBufferEof(&buf));
universe@548:     cxBufferPut(&buf, 'a');
universe@548:     EXPECT_TRUE(cxBufferEof(&buf));
universe@548: }
universe@548: 
universe@548: TEST_F(BufferEof, NotReached) {
universe@548:     buf.pos = buf.size - 1;
universe@548:     EXPECT_FALSE(cxBufferEof(&buf));
universe@548:     buf.pos = 0;
universe@548:     cxBufferWrite("test", 1, 5, &buf);
universe@548:     EXPECT_FALSE(cxBufferEof(&buf));
universe@548: }
universe@568: 
universe@568: class BufferRead : public ::testing::Test {
universe@568: protected:
universe@568:     CxBuffer buf{};
universe@568: 
universe@568:     void SetUp() override {
universe@568:         cxBufferInit(&buf, nullptr, 16, cxDefaultAllocator, CX_BUFFER_DEFAULT);
universe@568:         buf.capacity = 8; // artificially reduce capacity to check OOB writes
universe@568:         memset(buf.space, 0, 16);
universe@568:         memcpy(buf.space, "some data", 9);
universe@568:         buf.size = 9;
universe@568:     }
universe@568: 
universe@568:     void TearDown() override {
universe@568:         cxBufferDestroy(&buf);
universe@568:     }
universe@568: };
universe@568: 
universe@568: TEST_F(BufferRead, GetByte) {
universe@568:     buf.pos = 2;
universe@568:     EXPECT_EQ(cxBufferGet(&buf), 'm');
universe@568:     EXPECT_EQ(cxBufferGet(&buf), 'e');
universe@568:     EXPECT_EQ(cxBufferGet(&buf), ' ');
universe@568:     EXPECT_EQ(cxBufferGet(&buf), 'd');
universe@568:     EXPECT_EQ(buf.pos, 6);
universe@568: }
universe@568: 
universe@568: TEST_F(BufferRead, GetEof) {
universe@568:     buf.pos = buf.size;
universe@568:     EXPECT_EQ(cxBufferGet(&buf), EOF);
universe@568: }
universe@569: 
universe@569: TEST_F(BufferRead, ReadWithinBounds) {
universe@569:     buf.pos = 2;
universe@569:     char target[4];
universe@569:     auto read = cxBufferRead(&target, 1, 4, &buf);
universe@569:     ASSERT_EQ(read, 4);
universe@569:     EXPECT_EQ(memcmp(&target, "me d", 4), 0);
universe@569:     EXPECT_EQ(buf.pos, 6);
universe@569: }
universe@569: 
universe@569: TEST_F(BufferRead, ReadOutOfBounds) {
universe@569:     buf.pos = 6;
universe@569:     char target[4];
universe@569:     auto read = cxBufferRead(&target, 1, 4, &buf);
universe@569:     ASSERT_EQ(read, 3);
universe@569:     EXPECT_EQ(memcmp(&target, "ata", 3), 0);
universe@569:     EXPECT_EQ(buf.pos, 9);
universe@569: }
universe@569: 
universe@569: TEST_F(BufferRead, ReadOutOfBoundsMultibyte) {
universe@569:     buf.pos = 6;
universe@569:     char target[4];
universe@569:     target[2] = '\0';
universe@569:     auto read = cxBufferRead(&target, 2, 2, &buf);
universe@569:     ASSERT_EQ(read, 1);
universe@569:     EXPECT_EQ(memcmp(&target, "at\0", 3), 0);
universe@569:     EXPECT_EQ(buf.pos, 8);
universe@569: }
universe@569: 
universe@569: TEST_F(BufferRead, ReadEof) {
universe@569:     buf.pos = 9;
universe@569:     char target[4];
universe@569:     auto read = cxBufferRead(&target, 1, 1, &buf);
universe@569:     ASSERT_EQ(read, 0);
universe@569:     EXPECT_EQ(buf.pos, 9);
universe@569: }