221 lines
6.0 KiB
C++
221 lines
6.0 KiB
C++
// Copyright (C) 2013 Red Hat, Inc. All rights reserved.
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//
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// This file is part of the thin-provisioning-tools source.
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//
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// thin-provisioning-tools is free software: you can redistribute it
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// and/or modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation, either version 3 of
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// the License, or (at your option) any later version.
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//
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// thin-provisioning-tools is distributed in the hope that it will be
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// useful, but WITHOUT ANY WARRANTY; without even the implied warranty
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// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with thin-provisioning-tools. If not, see
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// <http://www.gnu.org/licenses/>.
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// Set to one to add compile time checks.
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#define COMPILE_TIME_ERROR 0
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#include "gmock/gmock.h"
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#include "persistent-data/buffer.h"
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using namespace persistent_data;
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using namespace testing;
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// FIXME: get rid of these comments, the tests should be self explanatory
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// - Allocate several on the heap, check they have the requested
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// alignment. Try for various Alignments. If memalign has
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// restrictions could you document (eg, power of 2).
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// - you can use the [] to set a value in a non-const instance
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// - you can't use the [] to set a value in a const instance - not
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// sure how to do this, since it'll be a compile time error.
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// - you can use [] to read back a value that you've set.
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// - [] to read works in a const instance.
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// - you can use raw() to get and set values.
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// - an exception is thrown if you put too large an index in []
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// - check you can't copy a buffer via a copy constructor or ==
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// - (again a compile time error, just experiment so you understand
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// - boost::noncopyable).
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//----------------------------------------------------------------
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namespace {
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template <uint32_t Size, uint32_t Alignment>
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typename buffer<Size, Alignment>::ptr
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create_buffer(void) {
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return typename buffer<Size, Alignment>::ptr(new buffer<Size, Alignment>());
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}
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template <typename buffer>
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void assert_aligned(buffer const &b) {
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ASSERT_THAT((unsigned long) b.raw() & (buffer::ALIGNMENT - 1), Eq(0u));
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}
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}
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//----------------------------------------------------------------
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TEST(BufferTest, buffer_8_a_8_raw_access)
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{
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uint32_t const sz = 8, align = 8;
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buffer<sz, align>::ptr b = create_buffer<sz, align>();
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unsigned char *p = b->raw();
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// unsigned char const *pc = b->raw();
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p[0] = 0;
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ASSERT_THAT(p[0], Eq(0));
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p[0] = 4;
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ASSERT_THAT(p[0], Eq(4));
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}
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TEST(BufferTest, buffer_8_a_8_access)
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{
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uint32_t const sz = 8, align = 8;
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buffer<sz, align>::ptr b = create_buffer<sz, align>();
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(*b)[0] = 0;
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ASSERT_THAT((*b)[0], Eq(0));
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}
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TEST(BufferTest, buffer_8_a_8_oob)
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{
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uint32_t const sz = 8, align = 8;
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buffer<sz, align>::ptr b = create_buffer<sz, align>();
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ASSERT_THROW((*b)[8], std::range_error);
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}
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TEST(BufferTest, buffer_128_a_2_succeeds)
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{
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uint32_t const sz = 128, align = 2;
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buffer<sz, align>::ptr b = create_buffer<sz, align>();
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ASSERT_TRUE(b);
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}
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TEST(BufferTest, buffer_128_a_4_succeeds)
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{
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uint32_t const sz = 128, align = 4;
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buffer<sz, align>::ptr b = create_buffer<sz, align>();
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ASSERT_TRUE(b);
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}
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// Varying buffer size, alignment 8
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TEST(BufferTest, obeys_alignment)
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{
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assert_aligned(*create_buffer<8, 8>());
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assert_aligned(*create_buffer<16, 8>());
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assert_aligned(*create_buffer<32, 8>());
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assert_aligned(*create_buffer<64, 8>());
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assert_aligned(*create_buffer<128, 8>());
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assert_aligned(*create_buffer<256, 8>());
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assert_aligned(*create_buffer<512, 8>());
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assert_aligned(*create_buffer<1024, 8>());
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assert_aligned(*create_buffer<2048, 8>());
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assert_aligned(*create_buffer<4096, 8>());
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assert_aligned(*create_buffer<8192, 8>());
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assert_aligned(*create_buffer<8, 16>());
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assert_aligned(*create_buffer<16, 16>());
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assert_aligned(*create_buffer<32, 16>());
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assert_aligned(*create_buffer<64, 16>());
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assert_aligned(*create_buffer<128, 16>());
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assert_aligned(*create_buffer<256, 16>());
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assert_aligned(*create_buffer<512, 16>());
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assert_aligned(*create_buffer<1024, 16>());
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assert_aligned(*create_buffer<2048, 16>());
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assert_aligned(*create_buffer<4096, 16>());
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assert_aligned(*create_buffer<8192, 16>());
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}
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#if 0
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#if COMPILE_TIME_ERROR
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TEST(BufferTest, buffer_copy_fails)
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{
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uint32_t const sz = 8, align = 8;
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buffer<sz, align>::ptr b1 = create_buffer<sz, align>();
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buffer<sz, align>::ptr b2;
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*b2 = *b1; // Compile time failure
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}
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#endif
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#if COMPILE_TIME_ERROR
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TEST(BufferTest, buffer_8_a_8_raw_const_access)
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{
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uint32_t const sz = 8, align = 8;
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buffer<sz, align>::ptr b = create_buffer<sz, align>();
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unsigned char const *pc = b->raw();
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pc[0] = 5; // Compile time error accessing read-only location
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}
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#endif
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#if COMPILE_TIME_ERROR
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TEST(BufferTest, buffer_8_a_8_const_access)
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{
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uint32_t const sz = 8, align = 8;
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buffer<sz, align>::const_ptr b = create_buffer<sz, align>();
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(*b)[0] = 0; // Compile time error accessing read-only location
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}
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#endif
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// 8 byte buffer size, varying alignment from 1 - 7
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#if COMPILE_TIME_ERROR
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TEST(BufferTest, buffer_128_a_1_fails)
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{
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uint32_t const sz = 128, align = 1;
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buffer<sz, align>::ptr b = create_buffer<sz, align>();
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BOOST_CHECK(!b);
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ASSERT_THAT((unsigned long) b->raw() & (align - 1), 1);
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}
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#endif
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#if COMPILE_TIME_ERROR
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TEST(BufferTest, buffer_128_a_3_fails)
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{
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uint32_t const sz = 128, align = 3;
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buffer<sz, align>::ptr b = create_buffer<sz, align>();
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BOOST_CHECK(!b);
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}
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#endif
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#if COMPILE_TIME_ERROR
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TEST(BufferTest, buffer_128_a_5_fails)
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{
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uint32_t const sz = 128, align = 5;
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buffer<sz, align>::ptr b = create_buffer<sz, align>();
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BOOST_CHECK(!b);
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}
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TEST(BufferTest, buffer_128_a_6_fails)
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{
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uint32_t const sz = 128, align = 6;
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buffer<sz, align>::ptr b = create_buffer<sz, align>();
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BOOST_CHECK(!b);
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}
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TEST(BufferTest, buffer_128_a_7_fails)
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{
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uint32_t const sz = 128, align = 7;
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buffer<sz, align>::ptr b = create_buffer<sz, align>();
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BOOST_CHECK(!b);
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}
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#endif
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#undef COMPILE_TIME_ERROR
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#endif
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//----------------------------------------------------------------
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