Merge pull request #101 from group22DKE/drag__test_physics3d_impl

drag tests completed
OrbitalSimulator · Jun 18, 2021 · 0b05db5 · 0b05db5
2 parents 8a14904 + 3b5b99c
commit 0b05db5
Showing 1 changed file with 55 additions and 4 deletions.
diff --git a/app/src/test/java/src/test/TestLandingController.java b/app/src/test/java/src/test/TestLandingController.java
@@ -32,21 +32,72 @@ void testOnlyLanderFall()
 		// TODO (Jerome) 4hrs
 	}
 
-	@Test void testDrag()
+	/**
+	 * Tests drag for positive velocity
+	 * Expected to return a positive drag
+	 * Values used for calculations:
+	 *  - area = 1.91
+	 *  - drag coefficient = 2.1
+	 *  - density = 5.428
+	 */
+	@Test void testDragPositiveV()
 	{
-		// TODO (Sam) 2hrs
+		LandingController controller = new LandingController();
+		Vector3d velocity = new Vector3d(5,10,0);
+		Vector3d drag = controller.calculateDrag(velocity);
+		Vector3d expectedDrag = new Vector3d(272.15,1088.5854,0);
+		assertEquals(expectedDrag.getX(),drag.getX());
+		assertEquals(expectedDrag.getY(),drag.getY());
+		assertEquals(expectedDrag.getZ(),drag.getZ());
 	}
+
+	/**
+	 * Tests drag for negative velocity
+	 * Expected to return a positive drag
+	 * Values used for calculations:
+	 *  - area = 1.91
+	 *  - drag coefficient = 2.1
+	 *  - density = 5.428
+	 */
+	@Test void testDragNegativeV()
+	{
+		LandingController controller = new LandingController();
+		Vector3d velocity = new Vector3d(-5,-10,0);
+		Vector3d drag = controller.calculateDrag(velocity);
+		Vector3d expectedDrag = new Vector3d(272.15,1088.5854,0);
+		assertEquals(expectedDrag.getX(),drag.getX());
+		assertEquals(expectedDrag.getY(),drag.getY());
+		assertEquals(expectedDrag.getZ(),drag.getZ());
+	}
+
+	/**
+	 * Tests drag for zero velocity
+	 * Expected to return a positive drag
+	 * Values used for calculations:
+	 *  - area = 1.91
+	 *  - drag coefficient = 2.1
+	 *  - density = 5.428
+	 */
+	@Test void testDragZeroV()
+	{
+		LandingController controller = new LandingController();
+		Vector3d velocity = new Vector3d(0,0,0);
+		Vector3d drag = controller.calculateDrag(velocity);
+		Vector3d expectedDrag = new Vector3d(0,0,0);
+		assertEquals(expectedDrag.getX(),drag.getX());
+		assertEquals(expectedDrag.getY(),drag.getY());
+		assertEquals(expectedDrag.getZ(),drag.getZ());
+	}
+
 
 	@Test void testNormaliseOneNegativeOnePosiive()
 	{
-		// TODO (Alp) 1hr
 		LandingController control = new LandingController();
 		assertEquals(control.normalise(new Vector3d(4,4,4),new Vector3d(-1,-2,-3)),new Vector3d(5,6,7));
 	}
 
 	@Test void testRemoveZDimension()
 	{
-		// TODO (Alp) 30
 		LandingController control = new LandingController();
 		assertEquals(control.removeZDimension(new Vector3d(4,4,4)), new Vector3d(4,4,0));