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Add empty stage unit tests for mass calc

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This commit is contained in:
SiboVG 2022-09-23 19:51:53 +02:00
parent 9d8ca907bb
commit cf7238c128
1 changed files with 87 additions and 0 deletions
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87
core/test/net/sf/openrocket/masscalc/MassCalculatorTest.java
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@ -23,6 +23,29 @@ public class MassCalculatorTest extends BaseTestCase {
// tolerance for compared double test results
private static final double EPSILON = 0.00000001; // note: this precision matches MathUtil.java
@Test
public void testEmptyRocket() {
Rocket rocket = new Rocket();
FlightConfiguration config = rocket.getEmptyConfiguration();
final RigidBody actualStructure = MassCalculator.calculateStructure(config);
final double actualRocketDryMass = actualStructure.cm.weight;
final Coordinate actualRocketDryCM = actualStructure.cm;
assertEquals(" Empty Rocket Empty Mass is incorrect: ", 0, actualRocketDryMass, 0);
Coordinate expCM = new Coordinate(0, 0, 0, 0);
assertEquals("Empty Rocket CM.x is incorrect: ", expCM.x, actualRocketDryCM.x, 0);
assertEquals("Empty Rocket CM.y is incorrect: ", expCM.y, actualRocketDryCM.y, 0);
assertEquals("Empty Rocket CM.z is incorrect: ", expCM.z, actualRocketDryCM.z, 0);
assertEquals("Empty Rocket CM is incorrect: ", expCM, actualRocketDryCM);
double actualMOIrot = actualStructure.getRotationalInertia();
double actualMOIlong = actualStructure.getLongitudinalInertia();
assertEquals("Empty Rocket Rotational MOI calculated incorrectly: ", 0, actualMOIrot, 0);
assertEquals("Empty Rocket Longitudinal MOI calculated incorrectly: ", 0, actualMOIlong, 0);
}
@Test
public void testAlphaIIIStructure() {
Rocket rocket = TestRockets.makeEstesAlphaIII();
@ -1144,5 +1167,69 @@ public class MassCalculatorTest extends BaseTestCase {
assertEquals(" Booster Launch CM is incorrect: ", expCM, structure.getCM());
}
@Test
public void testEmptyStages() {
Rocket rocketRef = TestRockets.makeEstesAlphaIII(); // Reference rocket
FlightConfiguration configRef = rocketRef.getEmptyConfiguration();
configRef.setAllStages();
final RigidBody structureRef = MassCalculator.calculateStructure(configRef);
final double rocketDryMassRef = structureRef.cm.weight;
final Coordinate rocketDryCMRef = structureRef.cm;
Rocket rocket = TestRockets.makeEstesAlphaIII();
AxialStage stage1 = new AxialStage(); // To be added to the front of the rocket
AxialStage stage2 = new AxialStage(); // To be added to the rear of the rocket
rocket.addChild(stage1, 0);
rocket.addChild(stage2);
FlightConfiguration config = rocket.getEmptyConfiguration();
config.setAllStages();
final RigidBody structure = MassCalculator.calculateStructure(config);
final double rocketDryMass = structure.cm.weight;
final Coordinate rocketDryCM = structure.cm;
assertEquals(" Empty Stages Rocket Empty Mass is incorrect: ", rocketDryMassRef, rocketDryMass, EPSILON);
assertEquals("Empty Stages Rocket CM.x is incorrect: ", rocketDryCMRef.x, rocketDryCM.x, EPSILON);
assertEquals("Empty Stages Rocket CM.y is incorrect: ", rocketDryCMRef.y, rocketDryCM.y, EPSILON);
assertEquals("Empty Stages Rocket CM.z is incorrect: ", rocketDryCMRef.z, rocketDryCM.z, EPSILON);
assertEquals("Empty Stages Rocket CM is incorrect: ", rocketDryCMRef, rocketDryCM);
double MOIrotRef = structureRef.getRotationalInertia();
double MOIlongRef = structureRef.getLongitudinalInertia();
double MOIrot = structure.getRotationalInertia();
double MOIlong = structure.getLongitudinalInertia();
assertEquals("Empty Stages Rocket Rotational MOI calculated incorrectly: ", MOIrotRef, MOIrot, EPSILON);
assertEquals("Empty Stages Rocket Longitudinal MOI calculated incorrectly: ", MOIlongRef, MOIlong, EPSILON);
// if we use a mass override, setting to same mass, we should get same result
AxialStage sustainerRef = (AxialStage) rocketRef.getChild(0);
sustainerRef.setSubcomponentsOverridden(true);
sustainerRef.setMassOverridden(true);
sustainerRef.setOverrideMass(rocketDryMassRef);
AxialStage sustainer = (AxialStage) rocket.getChild(0);
sustainer.setSubcomponentsOverridden(true);
sustainer.setMassOverridden(true);
sustainer.setOverrideMass(rocketDryMass);
final RigidBody overrideStructureRef = MassCalculator.calculateStructure(configRef);
final Coordinate overrideRocketDryCMRef = overrideStructureRef.cm;
final RigidBody overrideStructure = MassCalculator.calculateStructure(config);
final Coordinate overrideRocketDryCM = overrideStructure.cm;
assertEquals("Empty Stages Rocket Override CM is incorrect: ", overrideRocketDryCMRef, overrideRocketDryCM);
double overrideMOIrotRef = overrideStructureRef.getRotationalInertia();
double overrideMOIlongRef = overrideStructureRef.getLongitudinalInertia();
double overrideMOIrot = overrideStructure.getRotationalInertia();
double overrideMOIlong = overrideStructure.getLongitudinalInertia();
assertEquals("Empty Stages Rocket Rotational MOI calculated incorrectly: ", overrideMOIrotRef, overrideMOIrot, EPSILON);
assertEquals("Empty Stages Rocket Longitudinal MOI calculated incorrectly: ", overrideMOIlongRef, overrideMOIlong, EPSILON);
}
}