AltitudeSumManager: extracted Barometer driver.

Part of #1424.

src/androidTest/java/de/dennisguse/opentracks/sensors/AltitudeSumManagerTest.java

@@ -1,33 +1,37 @@
 package de.dennisguse.opentracks.sensors;
 
+import static org.mockito.Mockito.when;
+
 import org.junit.Assert;
-import org.junit.Before;
 import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.junit.MockitoJUnitRunner;
 
 import de.dennisguse.opentracks.data.models.AtmosphericPressure;
+import de.dennisguse.opentracks.sensors.driver.BarometerInternal;
 
 /**
  * NOTE: Test data is completely artificial.
  */
+@RunWith(MockitoJUnitRunner.class)
 public class AltitudeSumManagerTest {
 
-    private final AltitudeSumManager subject = new AltitudeSumManager();
-
     private static void addSensorValue(AltitudeSumManager altitudeSumManager, float[] values) {
         for (float f : values) {
             altitudeSumManager.onSensorValueChanged(AtmosphericPressure.ofHPA(f));
         }
     }
 
-    @Before
-    public void setUp() {
-        subject.reset();
-    }
+    @Mock
+    BarometerInternal driver;
 
     @Test
     public void getAltitudeGainLoss_downhill() {
         // given
-        subject.setConnected(true);
+        AltitudeSumManager subject = new AltitudeSumManager(driver);
+
+        when(driver.isConnected()).thenReturn(true);
 
         // then
         addSensorValue(subject, new float[]{1015f, 1015.01f, 1015.02f, 1015.03f, 1015.04f, 1015.05f, 1015.06f, 1015.07f, 1015.08f, 1015.09f, 1015.10f, 1015.11f, 1015.12f, 1015.13f, 1018f, 1018.1f, 1018.1f, 1018.1f, 1018.1f});
@@ -40,7 +44,9 @@ public class AltitudeSumManagerTest {
     @Test
     public void sensorUnavailable() {
         // given
-        subject.setConnected(false);
+        AltitudeSumManager subject = new AltitudeSumManager(driver);
+
+        when(driver.isConnected()).thenReturn(true);
 
         // then
         subject.onSensorValueChanged(AtmosphericPressure.ofHPA(999f));