Updates/Tests the AnalogPotentiometer

New constructor for the AnalogPotentiometer to allow users to pass it an AnalogInput into the constructor
New FakePotentiometerSource to emulate a AnalogPotentiometer

Change-Id: I0f85b3d38e99d7ccbc7676bdf17fc3ec7e041e84

wpilibj/wpilibJavaIntegrationTests/src/main/java/edu/wpi/first/wpilibj/AnalogPotentiometerTest.java

@@ -0,0 +1,77 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) FIRST 2008-2014. 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;
+
+import static org.junit.Assert.*;
+
+import java.util.logging.Logger;
+
+import org.junit.After;
+import org.junit.AfterClass;
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import edu.wpi.first.wpilibj.fixtures.AnalogCrossConnectFixture;
+import edu.wpi.first.wpilibj.mockhardware.FakePotentiometerSource;
+import edu.wpi.first.wpilibj.test.AbstractComsSetup;
+import edu.wpi.first.wpilibj.test.TestBench;
+
+/**
+ * @author jonathanleitschuh
+ *
+ */
+public class AnalogPotentiometerTest extends AbstractComsSetup {
+	private static final Logger logger = Logger.getLogger(AnalogPotentiometerTest.class.getName());
+	private AnalogCrossConnectFixture analogIO;
+	private FakePotentiometerSource potSource;
+	private AnalogPotentiometer pot;
+	
+	private static final double DOUBLE_COMPARISON_DELTA = 1.0;
+
+	/**
+	 * @throws java.lang.Exception
+	 */
+	@Before
+	public void setUp() throws Exception {
+		analogIO = TestBench.getAnalogCrossConnectFixture();
+		potSource = new FakePotentiometerSource(analogIO.getOutput(), 360);
+		pot = new AnalogPotentiometer(analogIO.getInput(), 360.0/5.0, 0);
+		
+	}
+
+	/**
+	 * @throws java.lang.Exception
+	 */
+	@After
+	public void tearDown() throws Exception {
+		potSource.reset();
+		pot.free();
+		analogIO.teardown();
+	}
+	
+	@Override
+	protected Logger getClassLogger() {
+		return logger;
+	}
+	
+	@Test
+	public void testInitialSettings(){
+		assertEquals(0, pot.get(), DOUBLE_COMPARISON_DELTA);
+	}
+	
+	@Test
+	public void testRangeValues(){
+		for(double i = 0.0; i < 360.0; i = i+1.0){
+			potSource.setAngle(i);
+			assertEquals(i, pot.get(), DOUBLE_COMPARISON_DELTA);
+			Timer.delay(.02);
+		}
+	}
+
+
+}

wpilibj/wpilibJavaIntegrationTests/src/main/java/edu/wpi/first/wpilibj/WpiLibJTestSuite.java

@@ -17,6 +17,7 @@ import org.junit.runners.Suite.SuiteClasses;
 @RunWith(Suite.class)
 @SuiteClasses({
 				AnalogCrossConnectTest.class,
+				AnalogPotentiometerTest.class,
 				CounterTest.class,
 				DIOCrossConnectTest.class,
 				EncoderTest.class,

wpilibj/wpilibJavaIntegrationTests/src/main/java/edu/wpi/first/wpilibj/mockhardware/FakePotentiometerSource.java

@@ -0,0 +1,37 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) FIRST 2008-2014. 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.mockhardware;
+
+import edu.wpi.first.wpilibj.AnalogOutput;
+
+/**
+ * @author jonathanleitschuh
+ *
+ */
+public class FakePotentiometerSource {
+	private AnalogOutput output;
+	private double potMaxAngle;
+	private final double defaultPotMaxAngle;
+	public FakePotentiometerSource(AnalogOutput output, double defaultPotMaxAngle){
+		this.defaultPotMaxAngle = defaultPotMaxAngle;
+		potMaxAngle = defaultPotMaxAngle;
+		this.output = output;
+	}
+	
+	public void setRange(double range){
+		potMaxAngle = range;
+	}
+	
+	public void reset(){
+		potMaxAngle = defaultPotMaxAngle;
+		output.setVoltage(0.0);
+	}
+	
+	public void setAngle(double angle){
+		output.setVoltage((5.0/potMaxAngle)*angle);
+	}
+}