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/**
* Copyright (C) 2020 Adrien Hopkins
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
package sevenUnits.unit;
import static org.junit.jupiter.api.Assertions.assertEquals;
import java.util.Arrays;
import java.util.List;
import java.util.Random;
import java.util.concurrent.ThreadLocalRandom;
import org.junit.jupiter.api.Test;
/**
* Tests related to the {@code MultiUnit}.
*
* @since 2020-10-03
*/
class MultiUnitTest {
/**
* Ensures that the {@code MultiUnit} can convert properly.
*/
@Test
final void testConvert() {
final Random rng = ThreadLocalRandom.current();
final MultiUnit footInch = MultiUnit.of(BritishImperial.Length.FOOT,
BritishImperial.Length.INCH);
assertEquals(1702.0,
footInch.convertTo(Metric.METRE.withPrefix(Metric.MILLI),
Arrays.asList(5.0, 7.0)),
1.0);
for (int i = 0; i < 1000; i++) {
final double feet = rng.nextInt(1000);
final double inches = rng.nextDouble() * 12;
final double millimetres = feet * 304.8 + inches * 25.4;
final List<Double> feetAndInches = Metric.METRE
.withPrefix(Metric.MILLI).convertTo(footInch, millimetres);
assertEquals(feet, feetAndInches.get(0), 1e-10);
assertEquals(inches, feetAndInches.get(1), 1e-10);
}
}
/**
* Test method for {@link sevenUnits.unit.MultiUnit#convertFromBase(double)}.
*/
@Test
final void testConvertFromBase() {
final Random rng = ThreadLocalRandom.current();
final MultiUnit footInch = MultiUnit.of(BritishImperial.Length.FOOT,
BritishImperial.Length.INCH);
// 1.7 m =~ 5' + 7"
final List<Double> values = footInch.convertFromBase(1.7018);
assertEquals(5, values.get(0));
assertEquals(7, values.get(1), 1e-12);
for (int i = 0; i < 1000; i++) {
final double feet = rng.nextInt(1000);
final double inches = rng.nextDouble() * 12;
final double metres = feet * 0.3048 + inches * 0.0254;
final List<Double> feetAndInches = footInch.convertFromBase(metres);
assertEquals(feet, feetAndInches.get(0), 1e-10);
assertEquals(inches, feetAndInches.get(1), 1e-10);
}
}
/**
* Test method for
* {@link sevenUnits.unit.MultiUnit#convertToBase(java.util.List)}.
*/
@Test
final void testConvertToBase() {
final Random rng = ThreadLocalRandom.current();
final MultiUnit footInch = MultiUnit.of(BritishImperial.Length.FOOT,
BritishImperial.Length.INCH);
// 1.7 m =~ 5' + 7"
assertEquals(1.7018, footInch.convertToBase(Arrays.asList(5.0, 7.0)),
1e-12);
for (int i = 0; i < 1000; i++) {
final double feet = rng.nextInt(1000);
final double inches = rng.nextDouble() * 12;
final double metres = feet * 0.3048 + inches * 0.0254;
assertEquals(metres,
footInch.convertToBase(Arrays.asList(feet, inches)), 1e-12);
}
}
}
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