Add unit testing possibility using googletest on POSIX

src/modules/mc_att_control/AttitudeControl/AttitudeControlTest.cpp

@@ -0,0 +1,12 @@
+#include <gtest/gtest.h>
+#include <AttitudeControl.hpp>
+
+using namespace matrix;
+
+TEST(AttitudeControlTest, AllZeroCase) {
+	AttitudeControl attitude_control;
+	matrix::Vector3f rate_setpoint = attitude_control.update(Quatf(), Quatf(), 0.f);
+	EXPECT_EQ(rate_setpoint(0), 0.f);
+	EXPECT_EQ(rate_setpoint(1), 0.f);
+	EXPECT_EQ(rate_setpoint(2), 0.f);
+}

src/modules/mc_att_control/AttitudeControl/CMakeLists.txt

@@ -38,3 +38,5 @@ target_include_directories(AttitudeControl
 	PUBLIC
 	${CMAKE_CURRENT_SOURCE_DIR}
 )
+
+px4_add_gtest(SRC AttitudeControlTest.cpp LINKLIBS AttitudeControl)