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/* Copyright 2021 Balz Guenat
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "gtest/gtest.h"
#include "gmock/gmock.h"
#include <vector>
#include <algorithm>
#include <stdio.h>
extern "C" {
#include "encoder.h"
#include "encoder/tests/mock.h"
}
struct update {
int8_t index;
bool clockwise;
};
uint8_t updates_array_idx = 0;
update updates[32];
bool encoder_update_kb(uint8_t index, bool clockwise) {
updates[updates_array_idx % 32] = {index, clockwise};
updates_array_idx++;
return true;
}
bool setAndRead(pin_t pin, bool val) {
setPin(pin, val);
return encoder_read();
}
class EncoderTest : public ::testing::Test {};
TEST_F(EncoderTest, TestInit) {
updates_array_idx = 0;
encoder_init();
EXPECT_EQ(pinIsInputHigh[0], true);
EXPECT_EQ(pinIsInputHigh[1], true);
EXPECT_EQ(updates_array_idx, 0);
}
TEST_F(EncoderTest, TestOneClockwise) {
updates_array_idx = 0;
encoder_init();
// send 4 pulses. with resolution 4, that's one step and we should get 1 update.
setAndRead(0, false);
setAndRead(1, false);
setAndRead(0, true);
setAndRead(1, true);
EXPECT_EQ(updates_array_idx, 1);
EXPECT_EQ(updates[0].index, 0);
EXPECT_EQ(updates[0].clockwise, true);
}
TEST_F(EncoderTest, TestOneCounterClockwise) {
updates_array_idx = 0;
encoder_init();
setAndRead(1, false);
setAndRead(0, false);
setAndRead(1, true);
setAndRead(0, true);
EXPECT_EQ(updates_array_idx, 1);
EXPECT_EQ(updates[0].index, 0);
EXPECT_EQ(updates[0].clockwise, false);
}
TEST_F(EncoderTest, TestTwoClockwiseOneCC) {
updates_array_idx = 0;
encoder_init();
setAndRead(0, false);
setAndRead(1, false);
setAndRead(0, true);
setAndRead(1, true);
setAndRead(0, false);
setAndRead(1, false);
setAndRead(0, true);
setAndRead(1, true);
setAndRead(1, false);
setAndRead(0, false);
setAndRead(1, true);
setAndRead(0, true);
EXPECT_EQ(updates_array_idx, 3);
EXPECT_EQ(updates[0].index, 0);
EXPECT_EQ(updates[0].clockwise, true);
EXPECT_EQ(updates[1].index, 0);
EXPECT_EQ(updates[1].clockwise, true);
EXPECT_EQ(updates[2].index, 0);
EXPECT_EQ(updates[2].clockwise, false);
}
TEST_F(EncoderTest, TestNoEarly) {
updates_array_idx = 0;
encoder_init();
// send 3 pulses. with resolution 4, that's not enough for a step.
setAndRead(0, false);
setAndRead(1, false);
setAndRead(0, true);
EXPECT_EQ(updates_array_idx, 0);
// now send last pulse
setAndRead(1, true);
EXPECT_EQ(updates_array_idx, 1);
EXPECT_EQ(updates[0].index, 0);
EXPECT_EQ(updates[0].clockwise, true);
}
TEST_F(EncoderTest, TestHalfway) {
updates_array_idx = 0;
encoder_init();
// go halfway
setAndRead(0, false);
setAndRead(1, false);
EXPECT_EQ(updates_array_idx, 0);
// back off
setAndRead(1, true);
setAndRead(0, true);
EXPECT_EQ(updates_array_idx, 0);
// go all the way
setAndRead(0, false);
setAndRead(1, false);
setAndRead(0, true);
setAndRead(1, true);
// should result in 1 update
EXPECT_EQ(updates_array_idx, 1);
EXPECT_EQ(updates[0].index, 0);
EXPECT_EQ(updates[0].clockwise, true);
}
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