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)

wpilibjExamples/src/main/java/edu/wpi/first/wpilibj/examples/examples.json

@@ -5,7 +5,8 @@
     "tags": [
       "Getting Started with Java"
     ],
-    "foldername": "gettingstarted"
+    "foldername": "gettingstarted",
+    "gradlebase": "java"
   },
   {
     "name": "Tank Drive",
@@ -16,7 +17,8 @@
       "Robot and Motor",
       "Safety"
     ],
-    "foldername": "tankdrive"
+    "foldername": "tankdrive",
+    "gradlebase": "java"
   },
   {
     "name": "Mecanum Drive",
@@ -27,7 +29,8 @@
       "Robot and Motor",
       "Safety"
     ],
-    "foldername": "mecanumdrive"
+    "foldername": "mecanumdrive",
+    "gradlebase": "java"
   },
   {
     "name": "Ultrasonic",
@@ -37,7 +40,8 @@
       "Robot and Motor",
       "Analog"
     ],
-    "foldername": "ultrasonic"
+    "foldername": "ultrasonic",
+    "gradlebase": "java"
   },
   {
     "name": "Ultrasonic PID",
@@ -47,7 +51,8 @@
       "Robot and Motor",
       "Analog"
     ],
-    "foldername": "ultrasonicpid"
+    "foldername": "ultrasonicpid",
+    "gradlebase": "java"
   },
   {
     "name": "Potentiometer PID",
@@ -58,7 +63,8 @@
       "Analog",
       "Joystick"
     ],
-    "foldername": "potentiometerpid"
+    "foldername": "potentiometerpid",
+    "gradlebase": "java"
   },
   {
     "name": "Gyro",
@@ -69,7 +75,8 @@
       "Analog",
       "Joystick"
     ],
-    "foldername": "gyro"
+    "foldername": "gyro",
+    "gradlebase": "java"
   },
   {
     "name": "Gyro Mecanum",
@@ -80,7 +87,8 @@
       "Analog",
       "Joystick"
     ],
-    "foldername": "gyromecanum"
+    "foldername": "gyromecanum",
+    "gradlebase": "java"
   },
   {
     "name": "Motor Controller",
@@ -90,7 +98,22 @@
       "Joystick",
       "Robot and Motor"
     ],
-    "foldername": "motorcontrol"
+    "foldername": "motorcontrol",
+    "gradlebase": "java"
+  },
+  {
+    "name": "Motor Control With Encoder",
+    "description": "Demonstrate controlling a single motor with a Joystick and displaying the net movement of the motor using an encoder.",
+    "tags": [
+      "Robot and Motor",
+      "Digital",
+      "Sensors",
+      "Actuators",
+      "Joystick",
+      "Complete List"
+    ],
+    "foldername": "motorcontrolencoder",
+    "gradlebase": "java"
   },
   {
     "name": "GearsBot",
@@ -98,7 +121,8 @@
     "tags": [
       "Complete Robot"
     ],
-    "foldername": "gearsbot"
+    "foldername": "gearsbot",
+    "gradlebase": "java"
   },
   {
     "name": "PacGoat",
@@ -106,7 +130,8 @@
     "tags": [
       "Complete Robot"
     ],
-    "foldername": "pacgoat"
+    "foldername": "pacgoat",
+    "gradlebase": "java"
   },
   {
     "name": "Simple Vision",
@@ -115,7 +140,8 @@
       "Vision",
       "Complete List"
     ],
-    "foldername": "simplevision"
+    "foldername": "quickvision",
+    "gradlebase": "java"
   },
   {
     "name": "Intermediate Vision",
@@ -124,7 +150,8 @@
       "Vision",
       "Complete List"
     ],
-    "foldername": "intermediatevision"
+    "foldername": "intermediatevision",
+    "gradlebase": "java"
   },
   {
     "name": "Axis Camera Sample",
@@ -132,6 +159,7 @@
     "tags": [
       "Vision"
     ],
-    "foldername": "axiscamera"
+    "foldername": "axiscamera",
+    "gradlebase": "java"
   }
 ]

wpilibjExamples/src/main/java/edu/wpi/first/wpilibj/examples/motorcontrolencoder/Robot.java

@@ -0,0 +1,61 @@
+/*----------------------------------------------------------------------------*/
+/* 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.                                                               */
+/*----------------------------------------------------------------------------*/
+
+package edu.wpi.first.wpilibj.examples.motorcontrolencoder;
+
+import edu.wpi.first.wpilibj.Encoder;
+import edu.wpi.first.wpilibj.IterativeRobot;
+import edu.wpi.first.wpilibj.Joystick;
+import edu.wpi.first.wpilibj.SpeedController;
+import edu.wpi.first.wpilibj.smartdashboard.SmartDashboard;
+import edu.wpi.first.wpilibj.Spark;
+
+/**
+ * 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.
+ *
+ * <p>Joystick analog values range from -1 to 1 and speed controller inputs also
+ * range from -1 to 1 making it easy to work together.
+ *
+ * <p>In addition, the encoder value of an encoder connected to ports 0 and 1 is
+ * consistently sent to the Dashboard.
+ */
+public class Robot extends IterativeRobot {
+  private static final int kMotorPort = 0;
+  private static final int kJoystickPort = 0;
+  private static final int kEncoderPortA = 0;
+  private static final int kEncoderPortB = 1;
+
+  private SpeedController m_motor;
+  private Joystick m_joystick;
+  private Encoder m_encoder;
+
+  @Override
+  public void robotInit() {
+    m_motor = new Spark(kMotorPort);
+    m_joystick = new Joystick(kJoystickPort);
+    m_encoder = new Encoder(kEncoderPortA, kEncoderPortB);
+    // 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((Math.PI * 6) / 360.0);
+  }
+
+  /*
+   * The RobotPeriodic function is called every control packet no matter the
+   * robot mode.
+   */
+  @Override
+  public void robotPeriodic() {
+    SmartDashboard.putNumber("Encoder", m_encoder.getDistance());
+  }
+
+  @Override
+  public void teleopPeriodic() {
+    m_motor.set(m_joystick.getY());
+  }
+}

wpilibjExamples/src/main/java/edu/wpi/first/wpilibj/templates/templates.json

@@ -5,7 +5,8 @@
     "tags": [
       "Iterative"
     ],
-    "foldername": "iterative"
+    "foldername": "iterative",
+    "gradlebase": "java"
   },
   {
     "name": "Timed Robot",
@@ -13,7 +14,8 @@
     "tags": [
       "Timed"
     ],
-    "foldername": "timed"
+    "foldername": "timed",
+    "gradlebase": "java"
   },
   {
     "name": "Command Robot",
@@ -21,7 +23,8 @@
     "tags": [
       "Command"
     ],
-    "foldername": "commandbased"
+    "foldername": "commandbased",
+    "gradlebase": "java"
   },
   {
     "name": "Sample Robot",
@@ -29,6 +32,7 @@
     "tags": [
       "Sample"
     ],
-    "foldername": "sample"
+    "foldername": "sample",
+    "gradlebase": "java"
   }
 ]