Make C++ examples able to run GradleRIO unit tests (#1490)

Closes #1484

wpilibcExamples/src/main/cpp/examples/ArcadeDrive/cpp/Robot.cpp

@@ -27,4 +27,6 @@ class Robot : public frc::TimedRobot {
   }
 };
 
+#ifndef RUNNING_FRC_TESTS
 int main() { return frc::StartRobot<Robot>(); }
+#endif

wpilibcExamples/src/main/cpp/examples/AxisCameraSample/cpp/Robot.cpp

@@ -60,4 +60,6 @@ class Robot : public frc::TimedRobot {
   }
 };
 
+#ifndef RUNNING_FRC_TESTS
 int main() { return frc::StartRobot<Robot>(); }
+#endif

wpilibcExamples/src/main/cpp/examples/CANPDP/cpp/Robot.cpp

@@ -37,4 +37,6 @@ class Robot : public frc::TimedRobot {
   frc::PowerDistributionPanel m_pdp;
 };
 
+#ifndef RUNNING_FRC_TESTS
 int main() { return frc::StartRobot<Robot>(); }
+#endif

wpilibcExamples/src/main/cpp/examples/Encoder/cpp/Robot.cpp

@@ -80,4 +80,6 @@ class Robot : public frc::TimedRobot {
   frc::Encoder m_encoder{1, 2, false, frc::Encoder::k4X};
 };
 
+#ifndef RUNNING_FRC_TESTS
 int main() { return frc::StartRobot<Robot>(); }
+#endif

wpilibcExamples/src/main/cpp/examples/GearsBot/cpp/Robot.cpp

@@ -42,4 +42,6 @@ void Robot::TeleopPeriodic() { frc::Scheduler::GetInstance()->Run(); }
 
 void Robot::TestPeriodic() {}
 
+#ifndef RUNNING_FRC_TESTS
 int main() { return frc::StartRobot<Robot>(); }
+#endif

wpilibcExamples/src/main/cpp/examples/GettingStarted/cpp/Robot.cpp

@@ -55,4 +55,6 @@ class Robot : public frc::TimedRobot {
   frc::Timer m_timer;
 };
 
+#ifndef RUNNING_FRC_TESTS
 int main() { return frc::StartRobot<Robot>(); }
+#endif

wpilibcExamples/src/main/cpp/examples/Gyro/cpp/Robot.cpp

@@ -55,4 +55,6 @@ class Robot : public frc::TimedRobot {
   frc::Joystick m_joystick{kJoystickPort};
 };
 
+#ifndef RUNNING_FRC_TESTS
 int main() { return frc::StartRobot<Robot>(); }
+#endif

wpilibcExamples/src/main/cpp/examples/GyroMecanum/cpp/Robot.cpp

@@ -58,4 +58,6 @@ class Robot : public frc::TimedRobot {
   frc::Joystick m_joystick{kJoystickPort};
 };
 
+#ifndef RUNNING_FRC_TESTS
 int main() { return frc::StartRobot<Robot>(); }
+#endif

wpilibcExamples/src/main/cpp/examples/HidRumble/cpp/Robot.cpp

@@ -30,4 +30,6 @@ class Robot : public frc::TimedRobot {
   frc::XboxController m_hid{0};
 };
 
+#ifndef RUNNING_FRC_TESTS
 int main() { return frc::StartRobot<Robot>(); }
+#endif

wpilibcExamples/src/main/cpp/examples/IntermediateVision/cpp/Robot.cpp

@@ -73,4 +73,6 @@ class Robot : public frc::TimedRobot {
   }
 };
 
+#ifndef RUNNING_FRC_TESTS
 int main() { return frc::StartRobot<Robot>(); }
+#endif

wpilibcExamples/src/main/cpp/examples/MecanumDrive/cpp/Robot.cpp

@@ -48,4 +48,6 @@ class Robot : public frc::TimedRobot {
   frc::Joystick m_stick{kJoystickChannel};
 };
 
+#ifndef RUNNING_FRC_TESTS
 int main() { return frc::StartRobot<Robot>(); }
+#endif

wpilibcExamples/src/main/cpp/examples/MotorControl/cpp/Robot.cpp

@@ -26,4 +26,6 @@ class Robot : public frc::TimedRobot {
   frc::Spark m_motor{0};
 };
 
+#ifndef RUNNING_FRC_TESTS
 int main() { return frc::StartRobot<Robot>(); }
+#endif

wpilibcExamples/src/main/cpp/examples/MotorControlEncoder/cpp/Robot.cpp

@@ -48,4 +48,6 @@ class Robot : public frc::TimedRobot {
   frc::Encoder m_encoder{0, 1};
 };
 
+#ifndef RUNNING_FRC_TESTS
 int main() { return frc::StartRobot<Robot>(); }
+#endif

wpilibcExamples/src/main/cpp/examples/PacGoat/cpp/Robot.cpp

@@ -80,4 +80,6 @@ void Robot::Log() {
                                  drivetrain.GetRightEncoder().GetDistance());
 }
 
+#ifndef RUNNING_FRC_TESTS
 int main() { return frc::StartRobot<Robot>(); }
+#endif

wpilibcExamples/src/main/cpp/examples/PotentiometerPID/cpp/Robot.cpp

@@ -73,4 +73,6 @@ class Robot : public frc::TimedRobot {
 
 constexpr std::array<double, 3> Robot::kSetPoints;
 
+#ifndef RUNNING_FRC_TESTS
 int main() { return frc::StartRobot<Robot>(); }
+#endif

wpilibcExamples/src/main/cpp/examples/QuickVision/cpp/Robot.cpp

@@ -27,4 +27,6 @@ class Robot : public frc::TimedRobot {
   }
 };
 
+#ifndef RUNNING_FRC_TESTS
 int main() { return frc::StartRobot<Robot>(); }
+#endif

wpilibcExamples/src/main/cpp/examples/Relay/cpp/Robot.cpp

@@ -55,4 +55,6 @@ class Robot : public frc::TimedRobot {
   static constexpr int kRelayReverseButton = 2;
 };
 
+#ifndef RUNNING_FRC_TESTS
 int main() { return frc::StartRobot<Robot>(); }
+#endif

wpilibcExamples/src/main/cpp/examples/ShuffleBoard/cpp/Robot.cpp

@@ -79,4 +79,6 @@ class Robot : public frc::TimedRobot {
   nt::NetworkTableEntry m_maxSpeed;
 };
 
+#ifndef RUNNING_FRC_TESTS
 int main() { return frc::StartRobot<Robot>(); }
+#endif

wpilibcExamples/src/main/cpp/examples/Solenoid/cpp/Robot.cpp

@@ -67,4 +67,6 @@ class Robot : public frc::TimedRobot {
   static constexpr int kDoubleSolenoidReverse = 3;
 };
 
+#ifndef RUNNING_FRC_TESTS
 int main() { return frc::StartRobot<Robot>(); }
+#endif

wpilibcExamples/src/main/cpp/examples/Ultrasonic/cpp/Robot.cpp

@@ -50,4 +50,6 @@ class Robot : public frc::TimedRobot {
   frc::DifferentialDrive m_robotDrive{m_left, m_right};
 };
 
+#ifndef RUNNING_FRC_TESTS
 int main() { return frc::StartRobot<Robot>(); }
+#endif

wpilibcExamples/src/main/cpp/examples/UltrasonicPID/cpp/Robot.cpp

@@ -80,4 +80,6 @@ class Robot : public frc::TimedRobot {
   frc::PIDController m_pidController{kP, kI, kD, m_ultrasonic, m_pidOutput};
 };
 
+#ifndef RUNNING_FRC_TESTS
 int main() { return frc::StartRobot<Robot>(); }
+#endif