85 lines
3.0 KiB
C++
85 lines
3.0 KiB
C++
/*
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The MIT License (MIT)
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Copyright (c) 2016 Fred Sundvik
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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*/
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#include "gtest/gtest.h"
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extern "C" {
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#include "serial_link/protocol/triple_buffered_object.h"
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}
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struct test_object{
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uint8_t state;
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uint32_t buffer[3];
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};
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test_object test_object;
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class TripleBufferedObject : public testing::Test {
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public:
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TripleBufferedObject() {
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triple_buffer_init((triple_buffer_object_t*)&test_object);
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}
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};
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TEST_F(TripleBufferedObject, writes_and_reads_object) {
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*triple_buffer_begin_write(&test_object) = 0x3456ABCC;
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triple_buffer_end_write(&test_object);
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EXPECT_EQ(*triple_buffer_read(&test_object), 0x3456ABCC);
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}
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TEST_F(TripleBufferedObject, does_not_read_empty) {
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EXPECT_EQ(triple_buffer_read(&test_object), nullptr);
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}
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TEST_F(TripleBufferedObject, writes_twice_and_reads_object) {
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*triple_buffer_begin_write(&test_object) = 0x3456ABCC;
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triple_buffer_end_write(&test_object);
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*triple_buffer_begin_write(&test_object) = 0x44778899;
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triple_buffer_end_write(&test_object);
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EXPECT_EQ(*triple_buffer_read(&test_object), 0x44778899);
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}
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TEST_F(TripleBufferedObject, performs_another_write_in_the_middle_of_read) {
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*triple_buffer_begin_write(&test_object) = 1;
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triple_buffer_end_write(&test_object);
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uint32_t* read = triple_buffer_read(&test_object);
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*triple_buffer_begin_write(&test_object) = 2;
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triple_buffer_end_write(&test_object);
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EXPECT_EQ(*read, 1);
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EXPECT_EQ(*triple_buffer_read(&test_object), 2);
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EXPECT_EQ(triple_buffer_read(&test_object), nullptr);
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}
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TEST_F(TripleBufferedObject, performs_two_writes_in_the_middle_of_read) {
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*triple_buffer_begin_write(&test_object) = 1;
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triple_buffer_end_write(&test_object);
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uint32_t* read = triple_buffer_read(&test_object);
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*triple_buffer_begin_write(&test_object) = 2;
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triple_buffer_end_write(&test_object);
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*triple_buffer_begin_write(&test_object) = 3;
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triple_buffer_end_write(&test_object);
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EXPECT_EQ(*read, 1);
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EXPECT_EQ(*triple_buffer_read(&test_object), 3);
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EXPECT_EQ(triple_buffer_read(&test_object), nullptr);
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}
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