Adds tests to ensure all examples have matching item in json file (#1079)

Also checks that all items in the json file have a matching example
One was missing from C++, that example was added (The one in eclipse was completely wrong)

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

@@ -0,0 +1,51 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) 2017-2018 FIRST. All Rights Reserved.                        */
+/* Open Source Software - may be modified and shared by FRC teams. The code   */
+/* must be accompanied by the FIRST BSD license file in the root directory of */
+/* the project.                                                               */
+/*----------------------------------------------------------------------------*/
+
+#include <Encoder.h>
+#include <IterativeRobot.h>
+#include <Joystick.h>
+#include <SmartDashboard/SmartDashboard.h>
+#include <Spark.h>
+
+constexpr double kPi = 3.14159265358979;
+
+/**
+ * This sample program shows how to control a motor using a joystick. In the
+ * operator control part of the program, the joystick is read and the value is
+ * written to the motor.
+ *
+ * Joystick analog values range from -1 to 1 and speed controller inputs as
+ * range from -1 to 1 making it easy to work together.
+ *
+ * In addition, the encoder value of an encoder connected to ports 0 and 1 is
+ * consistently sent to the Dashboard.
+ */
+class Robot : public frc::IterativeRobot {
+ public:
+  void TeleopPeriodic() override { m_motor.Set(m_stick.GetY()); }
+
+  /*
+   * The RobotPeriodic function is called every control packet no matter the
+   * robot mode.
+   */
+  void RobotPeriodic() override {
+    frc::SmartDashboard::PutNumber("Encoder", m_encoder.GetDistance());
+  }
+
+  void RobotInit() override {
+    // Use SetDistancePerPulse to set the multiplier for GetDistance
+    // This is set up assuming a 6 inch wheel with a 360 CPR encoder.
+    m_encoder.SetDistancePerPulse((kPi * 6) / 360.0);
+  }
+
+ private:
+  frc::Joystick m_stick{0};
+  frc::Spark m_motor{0};
+  frc::Encoder m_encoder{0, 1};
+};
+
+int main() { return frc::StartRobot<Robot>(); }

wpilibcExamples/src/main/cpp/examples/examples.json

@@ -7,7 +7,9 @@
       "Actuators",
       "Joystick",
       "Complete List"
-    ]
+    ],
+    "foldername": "MotorControl",
+    "gradlebase": "cpp"
   },
   {
     "name": "Motor Control With Encoder",
@@ -19,7 +21,9 @@
       "Actuators",
       "Joystick",
       "Complete List"
-    ]
+    ],
+    "foldername": "MotorControlEncoder",
+    "gradlebase": "cpp"
   },
   {
     "name": "Relay",
@@ -28,7 +32,9 @@
       "Actuators",
       "Joystick",
       "Complete List"
-    ]
+    ],
+    "foldername": "Relay",
+    "gradlebase": "cpp"
   },
   {
     "name": "PDP CAN Monitoring",
@@ -37,7 +43,9 @@
       "Complete List",
       "CAN",
       "Sensors"
-    ]
+    ],
+    "foldername": "CANPDP",
+    "gradlebase": "cpp"
   },
   {
     "name": "Solenoids",
@@ -47,7 +55,9 @@
       "Joystick",
       "Pneumatics",
       "Complete List"
-    ]
+    ],
+    "foldername": "Solenoid",
+    "gradlebase": "cpp"
   },
   {
     "name": "Encoder",
@@ -56,7 +66,9 @@
       "Complete List",
       "Digital",
       "Sensors"
-    ]
+    ],
+    "foldername": "Encoder",
+    "gradlebase": "cpp"
   },
   {
     "name": "Arcade Drive",
@@ -66,7 +78,9 @@
       "Robot and Motor",
       "Joystick",
       "Complete List"
-    ]
+    ],
+    "foldername": "ArcadeDrive",
+    "gradlebase": "cpp"
   },
   {
     "name": "Mecanum Drive",
@@ -76,7 +90,9 @@
       "Robot and Motor",
       "Joystick",
       "Complete List"
-    ]
+    ],
+    "foldername": "MecanumDrive",
+    "gradlebase": "cpp"
   },
   {
     "name": "Ultrasonic",
@@ -86,7 +102,9 @@
       "Complete List",
       "Sensors",
       "Analog"
-    ]
+    ],
+    "foldername": "Ultrasonic",
+    "gradlebase": "cpp"
   },
   {
     "name": "UltrasonicPID",
@@ -96,7 +114,9 @@
       "Complete List",
       "Sensors",
       "Analog"
-    ]
+    ],
+    "foldername": "UltrasonicPID",
+    "gradlebase": "cpp"
   },
   {
     "name": "Gyro",
@@ -107,7 +127,9 @@
       "Sensors",
       "Analog",
       "Joystick"
-    ]
+    ],
+    "foldername": "Gyro",
+    "gradlebase": "cpp"
   },
   {
     "name": "Gyro Mecanum",
@@ -118,7 +140,9 @@
       "Sensors",
       "Analog",
       "Joysitck"
-    ]
+    ],
+    "foldername": "GyroMecanum",
+    "gradlebase": "cpp"
   },
   {
     "name": "PotentiometerPID",
@@ -129,7 +153,9 @@
       "Complete List",
       "Sensors",
       "Analog"
-    ]
+    ],
+    "foldername": "PotentiometerPID",
+    "gradlebase": "cpp"
   },
   {
     "name": "Getting Started",
@@ -137,7 +163,9 @@
     "tags": [
       "Getting Started with C++",
       "Complete List"
-    ]
+    ],
+    "foldername": "GettingStarted",
+    "gradlebase": "cpp"
   },
   {
     "name": "Simple Vision",
@@ -145,7 +173,9 @@
     "tags": [
       "Vision",
       "Complete List"
-    ]
+    ],
+    "foldername": "QuickVision",
+    "gradlebase": "cpp"
   },
   {
     "name": "Intermediate Vision",
@@ -153,7 +183,9 @@
     "tags": [
       "Vision",
       "Complete List"
-    ]
+    ],
+    "foldername": "IntermediateVision",
+    "gradlebase": "cpp"
   },
   {
     "name": "Axis Camera Sample",
@@ -161,7 +193,9 @@
     "tags": [
       "Vision",
       "Complete List"
-    ]
+    ],
+    "foldername": "AxisCameraSample",
+    "gradlebase": "cpp"
   },
   {
     "name": "GearsBot",
@@ -169,7 +203,9 @@
     "tags": [
       "CommandBased Robot",
       "Complete List"
-    ]
+    ],
+    "foldername": "GearsBot",
+    "gradlebase": "cpp"
   },
   {
     "name": "PacGoat",
@@ -177,6 +213,8 @@
     "tags": [
       "CommandBased Robot",
       "Complete List"
-    ]
+    ],
+    "foldername": "PacGoat",
+    "gradlebase": "cpp"
   }
 ]