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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 org.unitConverter.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 {
+	
+	@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(SI.METRE.withPrefix(SI.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 = SI.METRE.withPrefix(SI.MILLI)
+					.convertTo(footInch, millimetres);
+			assertEquals(feet, feetAndInches.get(0), 1e-10);
+			assertEquals(inches, feetAndInches.get(1), 1e-10);
+		}
+	}
+	
+	/**
+	 * Test method for
+	 * {@link org.unitConverter.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 org.unitConverter.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);
+		}
+	}
+}