QuantityTest.java

package de.hftstuttgart.cityunits.tests;

import static org.junit.jupiter.api.Assertions.*;

import java.util.Locale;
import java.util.Locale.Category;

import javax.measure.Quantity;
import javax.measure.Unit;
import javax.measure.quantity.Area;
import javax.measure.quantity.Length;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.Test;

import de.hftstuttgart.cityunits.model.CarbonEmission;
import de.hftstuttgart.cityunits.model.UrbanSimulationUnits;
import tech.units.indriya.quantity.Quantities;
import tech.units.indriya.unit.Units;

// Quantities.getQuantity("1.50 €"); does not compile in Maven without cast to String ???
class QuantityTest {
	@BeforeAll
	static void init() {
		// Initialize additional units like metric ton, $ and € with their labels
		UrbanSimulationUnits.getInstance();
		// Ensure US number format (interpret '.' as decimal point)
		Locale.setDefault(Category.FORMAT, Locale.US);
	}

	@Test
	void testTemperature() {
		Quantity<?> q = Quantities.getQuantity((String) "5 °C");

		assertEquals("[Θ]", q.getUnit().getDimension().toString(), "Wrong dimension!");
		assertEquals("278.15 K", q.toSystemUnit().toString(), "Wrong calculation of Celsius to Kelvin!");
	}

	@Test
	void testMetreAndArea() {
		Unit<Area> sqm = Units.METRE.multiply(Units.METRE).asType(Area.class);
		Quantity<Length> line = Quantities.getQuantity(2, Units.METRE);
		Quantity<Area> area = line.multiply(line).asType(Area.class);

		assertEquals(sqm, area.getUnit(), "Wrong unit computation!");
		assertEquals(4, area.getValue(), "Wrong calculation of area!");
	}

	@Test
	void testUrbanSimulationUnitMoney() {
		Quantity<?> cost = Quantities.getQuantity((String) "1.50 €");
		assertEquals(cost.getUnit(), UrbanSimulationUnits.EURO, "Wrong currency!");
	}

	@Test
	void testUrbanSimulationUnitPPMAndTon() {
		Quantity<?> q = Quantities.getQuantity((String) "20 ppm").multiply(Quantities.getQuantity((String) "10 t"));
		assertEquals("[M]", q.getUnit().getDimension().toString());
		assertEquals(UrbanSimulationUnits.PARTS_PER_MILLION.multiply(UrbanSimulationUnits.TON), q.getUnit());
		assertEquals(200, q.getValue());
	}

	@Test
	void testkWhPerCubicMeter() {
		Quantity<?> q = Quantities.getQuantity((String) "5.2 kW*h/m³");
		assertEquals("[M]/([L]·[T]²)", q.getUnit().getDimension().toString(), "Wrong dimension!");
		assertEquals("18720000 W·s/m³", q.toSystemUnit().toString());
	}

	@Test
	void testCO2eq() {
		Quantity<CarbonEmission> q = Quantities.getQuantity((String) "5200.7 kg CO₂eq").asType(CarbonEmission.class);
		assertEquals("[M]", q.getUnit().getDimension().toString(), "Wrong dimension!");
		assertTrue(q.isEquivalentTo(Quantities.getQuantity((String) "5.2007 t CO₂eq").asType(CarbonEmission.class)),
				"Wrong conversion from kg of CO₂eq to ton of CO₂eq!");
		assertTrue(q.isEquivalentTo(Quantities.getQuantity((String) "5200700 g CO₂eq").asType(CarbonEmission.class)),
				"Wrong conversion from kg of CO₂eq to gram of CO₂eq!");
	}

}