ucx: test/test_buffer.cpp@f90a7cfe2480 (annotated)

test/test_buffer.cpp@f90a7cfe2480 (annotated)

test/test_buffer.cpp

Mon, 25 Jul 2022 15:29:56 +0200

author: Mike Becker <universe@uap-core.de>
date: Mon, 25 Jul 2022 15:29:56 +0200
changeset 567: f90a7cfe2480
parent 566: d3100c987a39
child 568: 8eda32d09e3d
permissions: -rw-r--r--

#184 #170 more thorough flush testing

Also adds proper doc for write function.

 /*
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
  *
  * Copyright 2021 Mike Becker, Olaf Wintermann All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *   1. Redistributions of source code must retain the above copyright
  *      notice, this list of conditions and the following disclaimer.
  *
  *   2. Redistributions in binary form must reproduce the above copyright
  *      notice, this list of conditions and the following disclaimer in the
  *      documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  */
 #include "cx/buffer.h"
 #include <gtest/gtest.h>
 #include "util_allocator.h"
 class BufferFixture : public ::testing::Test {
 protected:
     void SetUp() override {
         cxBufferInit(&buf, nullptr, 16, cxDefaultAllocator, CX_BUFFER_DEFAULT);
         buf.size = 6;
         buf.pos = 3;
     }
     void TearDown() override {
         cxBufferDestroy(&buf);
     }
     CxBuffer buf{};
 };
 static void expect_default_flush_config(CxBuffer *buf) {
     EXPECT_EQ(buf->flush_blkmax, 0);
     EXPECT_EQ(buf->flush_blksize, 4096);
     EXPECT_EQ(buf->flush_threshold, SIZE_MAX);
     EXPECT_EQ(buf->flush_func, nullptr);
     EXPECT_EQ(buf->flush_target, nullptr);
 }
 TEST(BufferInit, WrapSpace) {
     CxTestingAllocator alloc;
     CxBuffer buf;
     void *space = cxMalloc(&alloc, 16);
     cxBufferInit(&buf, space, 16, &alloc, CX_BUFFER_DEFAULT);
     expect_default_flush_config(&buf);
     EXPECT_EQ(buf.space, space);
     EXPECT_EQ(buf.flags & CX_BUFFER_AUTO_EXTEND, 0);
     EXPECT_EQ(buf.flags & CX_BUFFER_FREE_CONTENTS, 0);
     EXPECT_EQ(buf.pos, 0);
     EXPECT_EQ(buf.size, 0);
     EXPECT_EQ(buf.capacity, 16);
     EXPECT_EQ(buf.allocator, &alloc);
     cxBufferDestroy(&buf);
     EXPECT_FALSE(alloc.verify());
     cxFree(&alloc, space);
     EXPECT_TRUE(alloc.verify());
 }
 TEST(BufferInit, WrapSpaceAutoExtend) {
     CxTestingAllocator alloc;
     CxBuffer buf;
     void *space = cxMalloc(&alloc, 16);
     cxBufferInit(&buf, space, 16, &alloc, CX_BUFFER_AUTO_EXTEND);
     expect_default_flush_config(&buf);
     EXPECT_EQ(buf.space, space);
     EXPECT_EQ(buf.flags & CX_BUFFER_AUTO_EXTEND, CX_BUFFER_AUTO_EXTEND);
     EXPECT_EQ(buf.flags & CX_BUFFER_FREE_CONTENTS, 0);
     EXPECT_EQ(buf.pos, 0);
     EXPECT_EQ(buf.size, 0);
     EXPECT_EQ(buf.capacity, 16);
     EXPECT_EQ(buf.allocator, &alloc);
     cxBufferDestroy(&buf);
     EXPECT_FALSE(alloc.verify());
     cxFree(&alloc, space);
     EXPECT_TRUE(alloc.verify());
 }
 TEST(BufferInit, WrapSpaceAutoFree) {
     CxTestingAllocator alloc;
     CxBuffer buf;
     void *space = cxMalloc(&alloc, 16);
     cxBufferInit(&buf, space, 16, &alloc, CX_BUFFER_FREE_CONTENTS);
     expect_default_flush_config(&buf);
     EXPECT_EQ(buf.space, space);
     EXPECT_EQ(buf.flags & CX_BUFFER_AUTO_EXTEND, 0);
     EXPECT_EQ(buf.flags & CX_BUFFER_FREE_CONTENTS, CX_BUFFER_FREE_CONTENTS);
     EXPECT_EQ(buf.pos, 0);
     EXPECT_EQ(buf.size, 0);
     EXPECT_EQ(buf.capacity, 16);
     EXPECT_EQ(buf.allocator, &alloc);
     EXPECT_FALSE(alloc.verify());
     cxBufferDestroy(&buf);
     EXPECT_TRUE(alloc.verify());
 }
 TEST(BufferInit, FreshSpace) {
     CxTestingAllocator alloc;
     CxBuffer buf;
     cxBufferInit(&buf, nullptr, 8, &alloc, CX_BUFFER_DEFAULT);
     expect_default_flush_config(&buf);
     EXPECT_NE(buf.space, nullptr);
     EXPECT_EQ(buf.flags & CX_BUFFER_AUTO_EXTEND, 0);
     EXPECT_EQ(buf.flags & CX_BUFFER_FREE_CONTENTS, CX_BUFFER_FREE_CONTENTS);
     EXPECT_EQ(buf.pos, 0);
     EXPECT_EQ(buf.size, 0);
     EXPECT_EQ(buf.capacity, 8);
     EXPECT_EQ(buf.allocator, &alloc);
     EXPECT_FALSE(alloc.verify()); // space is still allocated
     cxBufferDestroy(&buf);
     EXPECT_TRUE(alloc.verify());
 }
 class BufferShiftFixture : public ::testing::Test {
 protected:
     void SetUp() override {
         ASSERT_TRUE(alloc.verify());
         cxBufferInit(&buf, nullptr, 16, &alloc, CX_BUFFER_DEFAULT);
         memcpy(buf.space, "test____________", 16);
         buf.capacity = 8; // purposely pretend that the buffer has less capacity s.t. we can test beyond the range
         buf.pos = 4;
         buf.size = 4;
     }
     void TearDown() override {
         cxBufferDestroy(&buf);
         EXPECT_TRUE(alloc.verify());
     }
     CxTestingAllocator alloc;
     CxBuffer buf{};
 };
 class BufferShiftLeft : public BufferShiftFixture {
 };
 TEST_F(BufferShiftLeft, Zero) {
     ASSERT_EQ(buf.pos, 4);
     ASSERT_EQ(buf.size, 4);
     int ret = cxBufferShiftLeft(&buf, 0);
     EXPECT_EQ(ret, 0);
     EXPECT_EQ(buf.pos, 4);
     EXPECT_EQ(buf.size, 4);
     EXPECT_TRUE(memcmp(buf.space, "test________", 8) == 0);
 }
 TEST_F(BufferShiftLeft, ZeroOffsetInterface) {
     ASSERT_EQ(buf.pos, 4);
     ASSERT_EQ(buf.size, 4);
     int ret = cxBufferShift(&buf, -0);
     EXPECT_EQ(ret, 0);
     EXPECT_EQ(buf.pos, 4);
     EXPECT_EQ(buf.size, 4);
     EXPECT_TRUE(memcmp(buf.space, "test________", 8) == 0);
 }
 TEST_F(BufferShiftLeft, Standard) {
     ASSERT_EQ(buf.pos, 4);
     ASSERT_EQ(buf.size, 4);
     int ret = cxBufferShiftLeft(&buf, 2);
     EXPECT_EQ(ret, 0);
     EXPECT_EQ(buf.pos, 2);
     EXPECT_EQ(buf.size, 2);
     EXPECT_TRUE(memcmp(buf.space, "stst________", 8) == 0);
 }
 TEST_F(BufferShiftLeft, Overshift) {
     ASSERT_LT(buf.pos, 6);
     ASSERT_LT(buf.size, 6);
     int ret = cxBufferShiftLeft(&buf, 6);
     EXPECT_EQ(ret, 0);
     EXPECT_EQ(buf.pos, 0);
     EXPECT_EQ(buf.size, 0);
     EXPECT_TRUE(memcmp(buf.space, "test________", 8) == 0);
 }
 TEST_F(BufferShiftLeft, OvershiftPosOnly) {
     buf.pos = 2;
     ASSERT_EQ(buf.size, 4);
     int ret = cxBufferShiftLeft(&buf, 3);
     EXPECT_EQ(ret, 0);
     EXPECT_EQ(buf.pos, 0);
     EXPECT_EQ(buf.size, 1);
     EXPECT_TRUE(memcmp(buf.space, "test________", 8) == 0);
 }
 TEST_F(BufferShiftLeft, OffsetInterface) {
     buf.pos = 3;
     ASSERT_EQ(buf.size, 4);
     int ret = cxBufferShift(&buf, -2);
     EXPECT_EQ(ret, 0);
     EXPECT_EQ(buf.pos, 1);
     EXPECT_EQ(buf.size, 2);
     EXPECT_TRUE(memcmp(buf.space, "stst________", 8) == 0);
 }
 class BufferShiftRight : public BufferShiftFixture {
 };
 TEST_F(BufferShiftRight, Zero) {
     ASSERT_EQ(buf.pos, 4);
     ASSERT_EQ(buf.size, 4);
     int ret = cxBufferShiftRight(&buf, 0);
     EXPECT_EQ(ret, 0);
     EXPECT_EQ(buf.pos, 4);
     EXPECT_EQ(buf.size, 4);
     EXPECT_TRUE(memcmp(buf.space, "test________", 8) == 0);
 }
 TEST_F(BufferShiftRight, ZeroOffsetInterface) {
     ASSERT_EQ(buf.pos, 4);
     ASSERT_EQ(buf.size, 4);
     int ret = cxBufferShift(&buf, +0);
     EXPECT_EQ(ret, 0);
     EXPECT_EQ(buf.pos, 4);
     EXPECT_EQ(buf.size, 4);
     EXPECT_TRUE(memcmp(buf.space, "test________", 8) == 0);
 }
 TEST_F(BufferShiftRight, Standard) {
     ASSERT_EQ(buf.pos, 4);
     ASSERT_EQ(buf.size, 4);
     int ret = cxBufferShiftRight(&buf, 3);
     EXPECT_EQ(ret, 0);
     EXPECT_EQ(buf.pos, 7);
     EXPECT_EQ(buf.size, 7);
     EXPECT_TRUE(memcmp(buf.space, "testest_____", 8) == 0);
 }
 TEST_F(BufferShiftRight, OvershiftDiscard) {
     ASSERT_EQ(buf.pos, 4);
     ASSERT_EQ(buf.size, 4);
     ASSERT_EQ(buf.capacity, 8);
     int ret = cxBufferShiftRight(&buf, 6);
     EXPECT_EQ(ret, 0);
     EXPECT_EQ(buf.pos, 8);
     EXPECT_EQ(buf.size, 8);
     EXPECT_EQ(buf.capacity, 8);
     EXPECT_TRUE(memcmp(buf.space, "test__te____", 8) == 0);
 }
 TEST_F(BufferShiftRight, OvershiftExtend) {
     ASSERT_EQ(buf.pos, 4);
     ASSERT_EQ(buf.size, 4);
     ASSERT_EQ(buf.capacity, 8);
     buf.flags |= CX_BUFFER_AUTO_EXTEND;
     int ret = cxBufferShiftRight(&buf, 6);
     EXPECT_EQ(ret, 0);
     EXPECT_EQ(buf.pos, 10);
     EXPECT_EQ(buf.size, 10);
     EXPECT_GE(buf.capacity, 10);
     EXPECT_TRUE(memcmp(buf.space, "test__test__", 8) == 0);
 }
 TEST_F(BufferShiftRight, OffsetInterface) {
     buf.pos = 3;
     ASSERT_EQ(buf.size, 4);
     int ret = cxBufferShift(&buf, 2);
     EXPECT_EQ(ret, 0);
     EXPECT_EQ(buf.pos, 5);
     EXPECT_EQ(buf.size, 6);
     EXPECT_TRUE(memcmp(buf.space, "tetest______", 8) == 0);
 }
 TEST(BufferMinimumCapacity, Sufficient) {
     CxTestingAllocator alloc;
     auto space = cxMalloc(&alloc, 8);
     CxBuffer buf;
     cxBufferInit(&buf, space, 8, &alloc, CX_BUFFER_FREE_CONTENTS);
     memcpy(space, "Testing", 8);
     buf.size = 8;
     cxBufferMinimumCapacity(&buf, 6);
     EXPECT_EQ(buf.capacity, 8);
     EXPECT_EQ(buf.size, 8);
     EXPECT_TRUE(memcmp(buf.space, "Testing", 8) == 0);
     cxBufferDestroy(&buf);
     EXPECT_TRUE(alloc.verify());
 }
 TEST(BufferMinimumCapacity, Extend) {
     CxTestingAllocator alloc;
     auto space = cxMalloc(&alloc, 8);
     CxBuffer buf;
     cxBufferInit(&buf, space, 8, &alloc, CX_BUFFER_FREE_CONTENTS); // NO auto extend!
     memcpy(space, "Testing", 8);
     buf.size = 8;
     cxBufferMinimumCapacity(&buf, 16);
     EXPECT_EQ(buf.capacity, 16);
     EXPECT_EQ(buf.size, 8);
     EXPECT_TRUE(memcmp(buf.space, "Testing", 8) == 0);
     cxBufferDestroy(&buf);
     EXPECT_TRUE(alloc.verify());
 }
 TEST(BufferClear, Test) {
     char space[16];
     strcpy(space, "clear test");
     CxBuffer buf;
     cxBufferInit(&buf, space, 16, cxDefaultAllocator, CX_BUFFER_DEFAULT);
     ASSERT_EQ(buf.size, 0);
     // only clear the used part of the buffer
     cxBufferClear(&buf);
     EXPECT_EQ(memcmp(space, "clear test", 10), 0);
     buf.size = 5;
     buf.pos = 3;
     cxBufferClear(&buf);
     EXPECT_EQ(memcmp(space, "\0\0\0\0\0 test", 10), 0);
     EXPECT_EQ(buf.size, 0);
     EXPECT_EQ(buf.pos, 0);
     cxBufferDestroy(&buf);
 }
 class BufferWrite : public ::testing::Test {
 protected:
     CxBuffer buf{}, target{};
     void SetUp() override {
         cxBufferInit(&target, nullptr, 16, cxDefaultAllocator, CX_BUFFER_AUTO_EXTEND);
         cxBufferInit(&buf, nullptr, 16, cxDefaultAllocator, CX_BUFFER_DEFAULT);
         buf.capacity = 8; // artificially reduce capacity to check OOB writes
         memset(buf.space, 0, 16);
         memcpy(buf.space, "prep", 4);
         buf.size = buf.pos = 4;
     }
     void TearDown() override {
         cxBufferDestroy(&buf);
         cxBufferDestroy(&target);
     }
     void enableFlushing() {
         buf.flush_target = &target;
         buf.flush_func = reinterpret_cast<cx_write_func>(cxBufferWrite);
         buf.flush_blkmax = 1;
     }
 };
 static size_t mock_write_limited_rate(
         void const *ptr,
         size_t size,
         __attribute__((unused)) size_t nitems,
         CxBuffer *buffer
 ) {
     // simulate limited target drain capacity
     static bool full = false;
     if (full) {
         full = false;
         return 0;
     } else {
         full = true;
         return cxBufferWrite(ptr, size, nitems > 2 ? 2 : nitems, buffer);
     }
 }
 TEST_F(BufferWrite, SizeOneFit) {
     const char *data = "test";
     ASSERT_EQ(buf.capacity, 8);
     ASSERT_EQ(buf.pos, 4);
     ASSERT_EQ(buf.size, 4);
     size_t written = cxBufferWrite(data, 1, 4, &buf);
     EXPECT_EQ(written, 4);
     EXPECT_EQ(buf.size, 8);
     EXPECT_EQ(buf.pos, 8);
     EXPECT_EQ(buf.capacity, 8);
     EXPECT_EQ(memcmp(buf.space, "preptest", 8), 0);
 }
 TEST_F(BufferWrite, SizeOneDiscard) {
     const char *data = "testing";
     ASSERT_EQ(buf.capacity, 8);
     ASSERT_EQ(buf.pos, 4);
     ASSERT_EQ(buf.size, 4);
     size_t written = cxBufferWrite(data, 1, 7, &buf);
     EXPECT_EQ(written, 4);
     EXPECT_EQ(buf.size, 8);
     EXPECT_EQ(buf.pos, 8);
     EXPECT_EQ(buf.capacity, 8);
     EXPECT_EQ(memcmp(buf.space, "preptest\0", 9), 0);
 }
 TEST_F(BufferWrite, SizeOneExtend) {
     buf.flags |= CX_BUFFER_AUTO_EXTEND;
     const char *data = "testing";
     ASSERT_EQ(buf.capacity, 8);
     ASSERT_EQ(buf.pos, 4);
     ASSERT_EQ(buf.size, 4);
     size_t written = cxBufferWrite(data, 1, 7, &buf);
     EXPECT_EQ(written, 7);
     EXPECT_EQ(buf.size, 11);
     EXPECT_EQ(buf.pos, 11);
     EXPECT_GE(buf.capacity, 11);
     EXPECT_EQ(memcmp(buf.space, "preptesting", 11), 0);
 }
 TEST_F(BufferWrite, MultibyteFit) {
     const char *data = "test";
     ASSERT_EQ(buf.capacity, 8);
     ASSERT_EQ(buf.pos, 4);
     ASSERT_EQ(buf.size, 4);
     size_t written = cxBufferWrite(data, 2, 2, &buf);
     EXPECT_EQ(written, 2);
     EXPECT_EQ(buf.size, 8);
     EXPECT_EQ(buf.pos, 8);
     EXPECT_EQ(buf.capacity, 8);
     EXPECT_EQ(memcmp(buf.space, "preptest", 8), 0);
 }
 TEST_F(BufferWrite, MultibyteDiscard) {
     const char *data = "testing";
     ASSERT_EQ(buf.capacity, 8);
     ASSERT_EQ(buf.size, 4);
     buf.pos = 3;
     size_t written = cxBufferWrite(data, 2, 4, &buf);
     // remember: whole elements are discarded if they do not fit
     EXPECT_EQ(written, 2);
     EXPECT_EQ(buf.size, 7);
     EXPECT_EQ(buf.pos, 7);
     EXPECT_EQ(buf.capacity, 8);
     EXPECT_EQ(memcmp(buf.space, "pretest\0", 8), 0);
 }
 TEST_F(BufferWrite, MultibyteExtend) {
     buf.flags |= CX_BUFFER_AUTO_EXTEND;
     const char *data = "tester";
     ASSERT_EQ(buf.capacity, 8);
     ASSERT_EQ(buf.size, 4);
     buf.pos = 3;
     size_t written = cxBufferWrite(data, 2, 3, &buf);
     // remember: whole elements are discarded if they do not fit
     EXPECT_EQ(written, 3);
     EXPECT_EQ(buf.size, 9);
     EXPECT_EQ(buf.pos, 9);
     EXPECT_GE(buf.capacity, 9);
     EXPECT_EQ(memcmp(buf.space, "pretester", 9), 0);
 }
 TEST_F(BufferWrite, PutcWrapperFit) {
     ASSERT_EQ(buf.capacity, 8);
     ASSERT_EQ(buf.pos, 4);
     ASSERT_EQ(buf.size, 4);
     int c = cxBufferPut(&buf, 0x200 | 'a');
     EXPECT_EQ(c, 'a');
     EXPECT_EQ(buf.size, 5);
     EXPECT_EQ(buf.pos, 5);
     EXPECT_EQ(buf.capacity, 8);
     EXPECT_EQ(memcmp(buf.space, "prepa\0", 6), 0);
 }
 TEST_F(BufferWrite, PutcWrapperDiscard) {
     ASSERT_EQ(buf.capacity, 8);
     ASSERT_EQ(buf.size, 4);
     buf.pos = 8;
     int c = cxBufferPut(&buf, 0x200 | 'a');
     EXPECT_EQ(c, EOF);
     EXPECT_EQ(buf.size, 4);
     EXPECT_EQ(buf.pos, 8);
     EXPECT_EQ(buf.capacity, 8);
     EXPECT_EQ(memcmp(buf.space, "prep\0\0\0\0\0", 9), 0);
 }
 TEST_F(BufferWrite, PutcWrapperExtend) {
     buf.flags |= CX_BUFFER_AUTO_EXTEND;
     ASSERT_EQ(buf.capacity, 8);
     ASSERT_EQ(buf.size, 4);
     buf.pos = 8;
     int c = cxBufferPut(&buf, 0x200 | 'a');
     EXPECT_EQ(c, 'a');
     EXPECT_EQ(buf.size, 9);
     EXPECT_EQ(buf.pos, 9);
     EXPECT_GE(buf.capacity, 9);
     EXPECT_EQ(memcmp(buf.space, "prep\0\0\0\0a", 9), 0);
 }
 TEST_F(BufferWrite, PutStringWrapperFit) {
     const char *data = "test";
     ASSERT_EQ(buf.capacity, 8);
     ASSERT_EQ(buf.pos, 4);
     ASSERT_EQ(buf.size, 4);
     size_t written = cxBufferPutString(&buf, data);
     EXPECT_EQ(written, 4);
     EXPECT_EQ(buf.size, 8);
     EXPECT_EQ(buf.pos, 8);
     EXPECT_EQ(buf.capacity, 8);
     EXPECT_EQ(memcmp(buf.space, "preptest", 8), 0);
 }
 TEST_F(BufferWrite, PutStringWrapperDiscard) {
     const char *data = "testing";
     ASSERT_EQ(buf.capacity, 8);
     ASSERT_EQ(buf.pos, 4);
     ASSERT_EQ(buf.size, 4);
     size_t written = cxBufferPutString(&buf, data);
     EXPECT_EQ(written, 4);
     EXPECT_EQ(buf.size, 8);
     EXPECT_EQ(buf.pos, 8);
     EXPECT_EQ(buf.capacity, 8);
     EXPECT_EQ(memcmp(buf.space, "preptest\0", 9), 0);
 }
 TEST_F(BufferWrite, PutStringWrapperExtend) {
     buf.flags |= CX_BUFFER_AUTO_EXTEND;
     const char *data = "testing";
     ASSERT_EQ(buf.capacity, 8);
     ASSERT_EQ(buf.pos, 4);
     ASSERT_EQ(buf.size, 4);
     size_t written = cxBufferPutString(&buf, data);
     EXPECT_EQ(written, 7);
     EXPECT_EQ(buf.size, 11);
     EXPECT_EQ(buf.pos, 11);
     EXPECT_GE(buf.capacity, 11);
     EXPECT_EQ(memcmp(buf.space, "preptesting", 11), 0);
 }
 TEST_F(BufferWrite, MultOverflow) {
     const char *data = "testing";
     ASSERT_EQ(buf.capacity, 8);
     ASSERT_EQ(buf.pos, 4);
     ASSERT_EQ(buf.size, 4);
     size_t written = cxBufferWrite(data, 8, SIZE_MAX / 4, &buf);
     EXPECT_EQ(written, 0);
     EXPECT_EQ(buf.capacity, 8);
     EXPECT_EQ(buf.pos, 4);
     EXPECT_EQ(buf.size, 4);
     EXPECT_EQ(memcmp(buf.space, "prep\0", 5), 0);
 }
 TEST_F(BufferWrite, MaxCapaOverflow) {
     buf.flags |= CX_BUFFER_AUTO_EXTEND;
     const char *data = "testing";
     ASSERT_EQ(buf.capacity, 8);
     ASSERT_EQ(buf.pos, 4);
     ASSERT_EQ(buf.size, 4);
     size_t written = cxBufferWrite(data, 1, SIZE_MAX - 2, &buf);
     EXPECT_EQ(written, 0);
     EXPECT_EQ(buf.capacity, 8);
     EXPECT_EQ(buf.pos, 4);
     EXPECT_EQ(buf.size, 4);
     EXPECT_EQ(memcmp(buf.space, "prep\0", 5), 0);
 }
 TEST_F(BufferWrite, OnlyOverwrite) {
     buf.flags |= CX_BUFFER_AUTO_EXTEND;
     ASSERT_EQ(buf.capacity, 8);
     memcpy(buf.space, "preptest", 8);
     buf.pos = 3;
     buf.size = 8;
     size_t written = cxBufferWrite("XXX", 2, 2, &buf);
     EXPECT_EQ(written, 2);
     EXPECT_EQ(buf.capacity, 8);
     EXPECT_EQ(buf.size, 8);
     EXPECT_EQ(buf.pos, 7);
     EXPECT_EQ(memcmp(buf.space, "preXXX\0t", 8), 0);
 }
 TEST_F(BufferWrite, FlushAtCapacity) {
     enableFlushing();
     ASSERT_EQ(buf.capacity, 8);
     ASSERT_EQ(buf.pos, 4);
     size_t written = cxBufferWrite("foo", 1, 3, &buf);
     EXPECT_EQ(written, 3);
     ASSERT_EQ(buf.pos, 7);
     ASSERT_EQ(buf.size, 7);
     ASSERT_EQ(target.pos, 0);
     ASSERT_EQ(target.size, 0);
     written = cxBufferWrite("hello", 1, 5, &buf);
     EXPECT_EQ(written, 5);
     EXPECT_EQ(buf.pos, 0);
     EXPECT_EQ(buf.size, 0);
     EXPECT_EQ(buf.capacity, 8);
     EXPECT_EQ(target.pos, 12);
     ASSERT_EQ(target.size, 12);
     EXPECT_EQ(memcmp(target.space, "prepfoohello", 12), 0);
 }
 TEST_F(BufferWrite, FlushAtThreshold) {
     enableFlushing();
     buf.flush_threshold = 12;
     buf.flags |= CX_BUFFER_AUTO_EXTEND;
     ASSERT_EQ(buf.capacity, 8);
     ASSERT_EQ(buf.pos, 4);
     size_t written = cxBufferWrite("foobar", 1, 6, &buf);
     EXPECT_EQ(written, 6);
     ASSERT_EQ(buf.pos, 10);
     ASSERT_EQ(buf.size, 10);
     ASSERT_GE(buf.capacity, 10);
     ASSERT_LE(buf.capacity, 12);
     ASSERT_EQ(target.pos, 0);
     ASSERT_EQ(target.size, 0);
     written = cxBufferWrite("hello", 1, 5, &buf);
     EXPECT_EQ(written, 5);
     EXPECT_EQ(buf.pos, 0);
     EXPECT_EQ(buf.size, 0);
     EXPECT_LE(buf.capacity, 12);
     EXPECT_EQ(target.pos, 15);
     ASSERT_EQ(target.size, 15);
     EXPECT_EQ(memcmp(target.space, "prepfoobarhello", 15), 0);
 }
 TEST_F(BufferWrite, FlushRateLimited) {
     enableFlushing();
     // limit the rate of the flush function and the capacity of the target
     target.capacity = 16;
     target.flags &= ~CX_BUFFER_AUTO_EXTEND;
     buf.flush_func = (cx_write_func) mock_write_limited_rate;
     ASSERT_EQ(buf.capacity, 8);
     ASSERT_EQ(buf.pos, 4);
     size_t written = cxBufferWrite("foo", 1, 3, &buf);
     EXPECT_EQ(written, 3);
     ASSERT_EQ(buf.pos, 7);
     ASSERT_EQ(buf.size, 7);
     ASSERT_EQ(target.pos, 0);
     ASSERT_EQ(target.size, 0);
     written = cxBufferWrite("hello, world!", 1, 13, &buf);
     // " world!" fits into this buffer, the remaining stuff is flushed out
     EXPECT_EQ(written, 13);
     EXPECT_EQ(buf.pos, 7);
     EXPECT_EQ(buf.size, 7);
     EXPECT_EQ(buf.capacity, 8);
     EXPECT_EQ(memcmp(buf.space, " world!", 7), 0);
     EXPECT_EQ(target.pos, 13);
     ASSERT_EQ(target.size, 13);
     EXPECT_EQ(target.capacity, 16);
     EXPECT_EQ(memcmp(target.space, "prepfoohello,", 13), 0);
 }
 class BufferSeek : public BufferFixture {
 };
 TEST_F(BufferSeek, SetZero) {
     int result = cxBufferSeek(&buf, 0, SEEK_SET);
     EXPECT_EQ(result, 0);
     EXPECT_EQ(buf.pos, 0);
 }
 TEST_F(BufferSeek, SetValid) {
     int result = cxBufferSeek(&buf, 5, SEEK_SET);
     EXPECT_EQ(result, 0);
     EXPECT_EQ(buf.pos, 5);
 }
 TEST_F(BufferSeek, SetInvalid) {
     ASSERT_EQ(buf.pos, 3);
     int result = cxBufferSeek(&buf, 6, SEEK_SET);
     EXPECT_NE(result, 0);
     EXPECT_EQ(buf.pos, 3);
 }
 TEST_F(BufferSeek, CurZero) {
     ASSERT_EQ(buf.pos, 3);
     int result = cxBufferSeek(&buf, 0, SEEK_CUR);
     EXPECT_EQ(result, 0);
     EXPECT_EQ(buf.pos, 3);
 }
 TEST_F(BufferSeek, CurValidPositive) {
     ASSERT_EQ(buf.pos, 3);
     int result = cxBufferSeek(&buf, 2, SEEK_CUR);
     EXPECT_EQ(result, 0);
     EXPECT_EQ(buf.pos, 5);
 }
 TEST_F(BufferSeek, CurValidNegative) {
     ASSERT_EQ(buf.pos, 3);
     int result = cxBufferSeek(&buf, -3, SEEK_CUR);
     EXPECT_EQ(result, 0);
     EXPECT_EQ(buf.pos, 0);
 }
 TEST_F(BufferSeek, CurInvalidPositive) {
     ASSERT_EQ(buf.pos, 3);
     int result = cxBufferSeek(&buf, 3, SEEK_CUR);
     EXPECT_NE(result, 0);
     EXPECT_EQ(buf.pos, 3);
 }
 TEST_F(BufferSeek, CurInvalidNegative) {
     ASSERT_EQ(buf.pos, 3);
     int result = cxBufferSeek(&buf, -4, SEEK_CUR);
     EXPECT_NE(result, 0);
     EXPECT_EQ(buf.pos, 3);
 }
 TEST_F(BufferSeek, EndZero) {
     ASSERT_EQ(buf.size, 6);
     int result = cxBufferSeek(&buf, 0, SEEK_END);
     // the (past-the-)end position is always invalid
     EXPECT_NE(result, 0);
     EXPECT_EQ(buf.pos, 3);
 }
 TEST_F(BufferSeek, EndValid) {
     ASSERT_EQ(buf.size, 6);
     int result = cxBufferSeek(&buf, -6, SEEK_END);
     EXPECT_EQ(result, 0);
     EXPECT_EQ(buf.pos, 0);
 }
 TEST_F(BufferSeek, EndInvalid) {
     ASSERT_EQ(buf.size, 6);
     int result = cxBufferSeek(&buf, 1, SEEK_END);
     EXPECT_NE(result, 0);
     EXPECT_EQ(buf.pos, 3);
 }
 TEST_F(BufferSeek, WhenceInvalid) {
     ASSERT_EQ(buf.size, 6);
     ASSERT_EQ(buf.pos, 3);
     int result = cxBufferSeek(&buf, 2, 9000);
     EXPECT_NE(result, 0);
     EXPECT_EQ(buf.size, 6);
     EXPECT_EQ(buf.pos, 3);
 }
 class BufferEof : public BufferFixture {
 };
 TEST_F(BufferEof, Reached) {
     buf.pos = buf.size;
     EXPECT_TRUE(cxBufferEof(&buf));
     buf.pos = buf.size - 1;
     ASSERT_FALSE(cxBufferEof(&buf));
     cxBufferPut(&buf, 'a');
     EXPECT_TRUE(cxBufferEof(&buf));
 }
 TEST_F(BufferEof, NotReached) {
     buf.pos = buf.size - 1;
     EXPECT_FALSE(cxBufferEof(&buf));
     buf.pos = 0;
     cxBufferWrite("test", 1, 5, &buf);
     EXPECT_FALSE(cxBufferEof(&buf));
 }

Mercurial > hg > ucx / annotate

test/test_buffer.cpp@f90a7cfe2480 (annotated)

test/test_buffer.cpp