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