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#include "gtest/gtest.h"
#define FASTMOUSE_IMPL
#include "fastmouse.h"
#undef FASTMOUSE_IMPL
#include <cmath>
// Wrappers to avoid specifying params we do not use here.
static void input_emit() {
fastmouse_input_emit(nullptr);
}
static void input_event(movement_type m, const int value) {
input_event_fastmouse_log(nullptr, EV_REL, m, value);
}
class FastmouseTest : public ::testing::Test {
protected:
void SetUp() override {
static auto fp = fastmouse;
static auto mp = movement;
fastmouse = fp;
movement = mp;
}
};
TEST_F(FastmouseTest, test_noop) {
EXPECT_EQ(movement.x, 0);
EXPECT_EQ(movement.y, 0);
input_event(REL_X, 1);
input_event(REL_Y, 1);
input_emit();
EXPECT_EQ(movement.x, 1);
EXPECT_EQ(movement.y, 1);
}
TEST_F(FastmouseTest, simple_division) {
fastmouse.division = 2;
input_event(REL_X, 1);
input_emit();
EXPECT_EQ(movement.x, 0);
EXPECT_EQ(movement.y, 0);
// 'Loss of 'precision' shows immediately here, it's not a big issue that the first
// two dots do not emit an event, it only occurs again after the next INT_MAX dots.
// All tests will exhibit this behaviour where the first division dots do not emit an event
// as expected unless INT_MAX % division == 0.
// We do not actually lose precision, it's just that we can only emit events in
// discreet intervals.
input_event(REL_X, 2);
input_emit();
EXPECT_EQ(movement.x, 1);
EXPECT_EQ(movement.y, 0);
input_event(REL_Y, 3);
input_emit();
EXPECT_EQ(movement.x, 1);
EXPECT_EQ(movement.y, 1);
}
TEST_F(FastmouseTest, high_division) {
fastmouse.division = 20;
for (auto i = 0; i < 20; ++i) {
input_event(REL_X, 1);
input_emit();
EXPECT_EQ(movement.x, 0);
EXPECT_EQ(movement.y, 0);
}
input_event(REL_X, 1);
input_emit();
EXPECT_EQ(movement.x, 1);
}
TEST_F(FastmouseTest, different_axis_division) {
fastmouse.division = 10;
input_event(REL_X, 201);
input_event(REL_Y, 51);
input_emit();
EXPECT_EQ(movement.x, 20);
EXPECT_EQ(movement.y, 5);
}
TEST_F(FastmouseTest, simple_rotation) {
// scripts/set_rotation.sh 45
fastmouse.rise = 1518500249;
fastmouse.run = 1518500249;
input_event(REL_X, 10'000);
input_emit();
EXPECT_EQ(movement.x, 7071);
EXPECT_EQ(movement.y, 7071);
// It's important we do not add distance when calculating rotation!
EXPECT_EQ(static_cast<int>(std::sqrt(movement.x * movement.x + movement.y * movement.y)), 9999);
}
TEST_F(FastmouseTest, simple_y_rotation) {
// scripts/set_rotation.sh 45
fastmouse.rise = 1518500249;
fastmouse.run = 1518500249;
input_event(REL_Y, 10'000);
input_emit();
EXPECT_EQ(movement.x, -7071);
EXPECT_EQ(movement.y, 7071);
EXPECT_EQ(static_cast<int>(std::sqrt(movement.x * movement.x + movement.y * movement.y)), 9999);
}
TEST_F(FastmouseTest, negative_rotation) {
// scripts/set_rotation.sh -120
fastmouse.rise = -1859775393;
fastmouse.run = -1073741824;
input_event(REL_X, 500);
input_emit();
EXPECT_EQ(movement.x, -250);
EXPECT_EQ(movement.y, -433);
EXPECT_EQ(static_cast<int>(std::sqrt(movement.x * movement.x + movement.y * movement.y)), 499);
}
TEST_F(FastmouseTest, inversion_rotation) {
// scripts/set_rotation.sh 180
fastmouse.rise = 0;
fastmouse.run = -2147483648;
input_event(REL_X, 500);
input_emit();
EXPECT_EQ(movement.x, -500);
EXPECT_EQ(movement.y, 0);
EXPECT_EQ(static_cast<int>(std::sqrt(movement.x * movement.x + movement.y * movement.y)), 500);
}
TEST_F(FastmouseTest, sideways_rotation) {
// scripts/set_rotation.sh 90
fastmouse.rise = 2147483647;
fastmouse.run = 0;
input_event(REL_X, 500);
input_emit();
EXPECT_EQ(movement.x, 0);
EXPECT_EQ(movement.y, 500);
EXPECT_EQ(static_cast<int>(std::sqrt(movement.x * movement.x + movement.y * movement.y)), 500);
}
TEST_F(FastmouseTest, rotation_with_division) {
fastmouse.division = 10;
// scripts/set_rotation.sh 10
fastmouse.rise = 372906621;
fastmouse.run = 2114858545;
input_event(REL_X, 100'000);
input_emit();
EXPECT_EQ(movement.x, 9848);
EXPECT_EQ(movement.y, 1736);
EXPECT_EQ(static_cast<int>(std::sqrt(movement.x * movement.x + movement.y * movement.y)), 9999);
}
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