Release version 0.5.0 (merge into stable)

3 files changed, 147 insertions, 147 deletions

diff --git a/src/test/java/sevenUnits/unit/MultiUnitTest.java b/src/test/java/sevenUnits/unit/MultiUnitTest.java
index 30f2941..949a1f1 100644
--- a/src/test/java/sevenUnits/unit/MultiUnitTest.java
+++ b/src/test/java/sevenUnits/unit/MultiUnitTest.java
@@ -31,7 +31,7 @@ import org.junit.jupiter.api.Test;
  * @since 2020-10-03
  */
 class MultiUnitTest {
-	
+
 	/**
 	 * Ensures that the {@code MultiUnit} can convert properly.
 	 */
@@ -40,24 +40,24 @@ class MultiUnitTest {
 		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)}.
 	 */
@@ -66,24 +66,24 @@ class MultiUnitTest {
 		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)}.
@@ -93,16 +93,16 @@ class MultiUnitTest {
 		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);
 		}
diff --git a/src/test/java/sevenUnits/unit/UnitDatabaseTest.java b/src/test/java/sevenUnits/unit/UnitDatabaseTest.java
index 4be33dd..9d650f0 100644
--- a/src/test/java/sevenUnits/unit/UnitDatabaseTest.java
+++ b/src/test/java/sevenUnits/unit/UnitDatabaseTest.java
@@ -53,9 +53,9 @@ import sevenUnits.utils.UncertainDouble;
 class UnitDatabaseTest {
 	private static final class SimpleEntry<K, V> implements Map.Entry<K, V> {
 		private final K key;
-		
+
 		private V value;
-		
+
 		/**
 		 * 
 		 * @since 2021-10-07
@@ -64,7 +64,7 @@ class UnitDatabaseTest {
 			this.key = key;
 			this.value = value;
 		}
-		
+
 		@Override
 		public boolean equals(Object obj) {
 			if (this == obj)
@@ -75,23 +75,23 @@ class UnitDatabaseTest {
 			return Objects.equals(this.key, other.getKey())
 					&& Objects.equals(this.value, other.getValue());
 		}
-		
+
 		@Override
 		public K getKey() {
 			return this.key;
 		}
-		
+
 		@Override
 		public V getValue() {
 			return this.value;
 		}
-		
+
 		@Override
 		public int hashCode() {
 			return (this.key == null ? 0 : this.key.hashCode())
 					^ (this.value == null ? 0 : this.value.hashCode());
 		}
-		
+
 		@Override
 		public V setValue(V value) {
 			final V oldValue = this.value;
@@ -99,20 +99,20 @@ class UnitDatabaseTest {
 			return oldValue;
 		}
 	}
-	
+
 	// some linear units and one nonlinear
 	private static final Unit U = Metric.METRE;
 	private static final Unit V = Metric.KILOGRAM;
-	
+
 	private static final Unit W = Metric.SECOND;
 	// used for testing expressions
 	// J = U^2 * V / W^2
 	private static final LinearUnit J = Metric.KILOGRAM
 			.times(Metric.METRE.toExponent(2))
 			.dividedBy(Metric.SECOND.toExponent(2));
-	
+
 	private static final LinearUnit K = Metric.KELVIN;
-	
+
 	private static final Unit NONLINEAR = Unit.fromConversionFunctions(
 			Metric.METRE.getBase(), o -> o + 1, o -> o - 1);
 	// make the prefix values prime so I can tell which multiplications were made
@@ -123,9 +123,9 @@ class UnitDatabaseTest {
 	private static final UnitPrefix C = UnitPrefix.valueOf(5)
 			.withName(NameSymbol.ofName("C"));
 	private static final UnitPrefix AB = UnitPrefix.valueOf(7);
-	
+
 	private static final UnitPrefix BC = UnitPrefix.valueOf(11);
-	
+
 	/**
 	 * Gets a map entry.
 	 *
@@ -139,7 +139,7 @@ class UnitDatabaseTest {
 	private static <K, V> Map.Entry<K, V> entry(K key, V value) {
 		return new SimpleEntry<>(key, value);
 	}
-	
+
 	/**
 	 * Loads the dimensionfile at src/test/resources/[path] to the database
 	 * {@code loadTo}.
@@ -156,7 +156,7 @@ class UnitDatabaseTest {
 			fail(e.getClass() + " occurred upon loading file \"" + path + "\".");
 		}
 	}
-	
+
 	/**
 	 * Loads the unitfile at src/test/resources/[path] to the database
 	 * {@code loadTo}.
@@ -173,7 +173,7 @@ class UnitDatabaseTest {
 			fail(e.getClass() + " occurred upon loading file \"" + path + "\".");
 		}
 	}
-	
+
 	/**
 	 * A test for the {@link UnitDatabase#evaluateUnitExpression(String)}
 	 * function. Simple because the expression parser has its own test.
@@ -183,26 +183,26 @@ class UnitDatabaseTest {
 	@Test
 	public void testEvaluateExpression() {
 		final UnitDatabase database = new UnitDatabase();
-		
+
 		database.addUnit("J", J);
 		database.addUnit("K", K);
-		
+
 		database.addPrefix("A", A);
 		database.addPrefix("B", B);
 		database.addPrefix("C", C);
-		
+
 		final LinearUnitValue expected = LinearUnitValue.of(J,
 				UncertainDouble.of(12, Math.sqrt(14.625)));
 		// note: units are exact, each number has an uncertainty of 1
 		final LinearUnitValue actual = database
 				.evaluateUnitExpression("J + (2 * 3) J + (20 / 4) J");
 		assertEquals(expected, actual);
-		
+
 		// check that negation works properly
 		assertEquals(2,
 				database.evaluateUnitExpression("J - -1 * J").getValueExact());
 	}
-	
+
 	/**
 	 * Test for {@link UnitDatabase#getUnit}, {@link UnitDatabase#getLinearUnit}
 	 * and {@link UnitDatabase#getLinearUnitValue}.
@@ -212,14 +212,14 @@ class UnitDatabaseTest {
 	@Test
 	public void testGetUnit() {
 		final UnitDatabase database = new UnitDatabase();
-		
+
 		database.addUnit("m", Metric.METRE);
 		database.addUnit("meter", Metric.METRE);
 		database.addUnit("metre", Metric.METRE);
 		database.addUnit("badname", Metric.METRE);
 		database.addUnit("K", Metric.KELVIN);
 		database.addUnit("degC", Metric.CELSIUS);
-		
+
 		// ensure getUnit returns units, regardless of whether the name is one of
 		// the unit's names
 		assertEquals(Metric.METRE, database.getUnit("m"));
@@ -228,14 +228,14 @@ class UnitDatabaseTest {
 		assertEquals(Metric.METRE, database.getUnit("badname"));
 		assertThrows(NoSuchElementException.class,
 				() -> database.getUnit("blabla"));
-		
+
 		assertEquals(Metric.KELVIN, database.getLinearUnit("K"));
 		assertThrows(IllegalArgumentException.class,
 				() -> database.getLinearUnit("degC"));
 		assertEquals(Metric.KELVIN.times(373.15),
 				database.getLinearUnit("degC(100)"));
 	}
-	
+
 	/**
 	 * Confirms that operations that shouldn't function for infinite databases
 	 * throw an {@code IllegalStateException}.
@@ -247,21 +247,21 @@ class UnitDatabaseTest {
 	public void testInfiniteSetExceptions() {
 		// load units
 		final UnitDatabase infiniteDatabase = new UnitDatabase();
-		
+
 		infiniteDatabase.addUnit("J", J);
 		infiniteDatabase.addUnit("K", K);
-		
+
 		infiniteDatabase.addPrefix("A", A);
 		infiniteDatabase.addPrefix("B", B);
 		infiniteDatabase.addPrefix("C", C);
-		
+
 		final Set<Entry<String, Unit>> entrySet = infiniteDatabase.unitMap()
 				.entrySet();
 		final Set<String> keySet = infiniteDatabase.unitMap().keySet();
 		assertThrows(IllegalStateException.class, () -> entrySet.toArray());
 		assertThrows(IllegalStateException.class, () -> keySet.toArray());
 	}
-	
+
 	/**
 	 * A bunch of tests for invalid dimension files
 	 *
@@ -282,7 +282,7 @@ class UnitDatabaseTest {
 		assertTrue(e instanceof IllegalArgumentException
 				|| e instanceof NoSuchElementException);
 	}
-	
+
 	/**
 	 * A bunch of tests for invalid unit files
 	 *
@@ -300,7 +300,7 @@ class UnitDatabaseTest {
 		assertTrue(e instanceof IllegalArgumentException
 				|| e instanceof NoSuchElementException);
 	}
-	
+
 	/**
 	 * Tests loading a valid dimension-file with some derived dimensions.
 	 * 
@@ -312,13 +312,13 @@ class UnitDatabaseTest {
 		database.addDimension("LENGTH", Metric.Dimensions.LENGTH);
 		database.addDimension("MASS", Metric.Dimensions.MASS);
 		database.addDimension("TIME", Metric.Dimensions.TIME);
-		
+
 		loadDimensionFile(database, "/test-dimensionfile-valid1.txt");
 		assertEquals(Metric.Dimensions.ENERGY, database.getDimension("ENERGY"));
 		assertEquals(Metric.Dimensions.POWER, database.getDimension("POWER"));
-		
+
 	}
-	
+
 	/**
 	 * Tests loading a valid unitfile with some prefixes and no units.
 	 * 
@@ -327,13 +327,13 @@ class UnitDatabaseTest {
 	@Test
 	public void testLoadingValidPrefixes() {
 		final UnitDatabase database = new UnitDatabase();
-		
+
 		loadUnitsFile(database, "/test-unitsfile-valid2.txt");
 		assertEquals(7, database.getPrefix("A").getMultiplier());
 		assertEquals(11, database.getPrefix("B").getMultiplier());
 		assertEquals(13, database.getPrefix("C").getMultiplier());
 	}
-	
+
 	/**
 	 * Tests loading a valid unitfile with some units and preloaded prefixes
 	 * 
@@ -342,43 +342,43 @@ class UnitDatabaseTest {
 	@Test
 	public void testLoadingValidUnits() {
 		final UnitDatabase database = new UnitDatabase();
-		
+
 		database.addUnit("U", U);
 		database.addUnit("V", V);
 		database.addUnit("W", W);
 		database.addUnit("fj", J.times(5));
 		database.addUnit("ej", J.times(8));
-		
+
 		database.addPrefix("A", A);
 		database.addPrefix("B", B);
 		database.addPrefix("C", C);
-		
+
 		loadUnitsFile(database, "/test-unitsfile-valid1.txt");
-		
+
 		final Unit expected1 = ((LinearUnit) U).withPrefix(A).withPrefix(B)
 				.withPrefix(C);
 		final Unit actual1 = database.getUnit("test1");
 		assertEquals(expected1, actual1);
-		
+
 		final Unit expected2 = ((LinearUnit) W).withPrefix(B)
 				.times(((LinearUnit) V).withPrefix(C));
 		final Unit actual2 = database.getUnit("test2");
 		assertEquals(expected2, actual2);
-		
+
 		final Unit expected3 = ((LinearUnit) U)
 				.times(A.getMultiplier() + C.getMultiplier() - B.getMultiplier());
 		final Unit actual3 = database.getUnit("test3");
 		assertEquals(expected3, actual3);
-		
+
 		final UnitValue expected4 = UnitValue.of(U, 1);
 		final UnitValue actual4 = database
 				.evaluateUnitExpression("-5 * U + -3 * U + 12 * U - 3 * U")
 				.asUnitValue();
 		assertEquals(expected4, actual4);
-		
+
 		assertTrue(System.err.toString().length() > 0);
 	}
-	
+
 	/**
 	 * Tests the iterator of the prefixless unit map. These tests are simple, as
 	 * the unit map iterator is simple.
@@ -388,16 +388,16 @@ class UnitDatabaseTest {
 	@Test
 	public void testPrefixedUnitMapIterator() {
 		final UnitDatabase database1 = new UnitDatabase();
-		
+
 		database1.addUnit("U", U);
 		database1.addUnit("V", V);
 		database1.addUnit("W", W);
-		
+
 		final Map<String, Unit> map1 = database1.unitMap();
 		final Iterator<String> keyIterator1 = map1.keySet().iterator();
 		final Iterator<Map.Entry<String, Unit>> entryIterator1 = map1.entrySet()
 				.iterator();
-		
+
 		final Set<String> expectedKeys = Set.of("U", "V", "W");
 		final Set<String> actualKeys = new HashSet<>();
 		while (keyIterator1.hasNext()) {
@@ -405,7 +405,7 @@ class UnitDatabaseTest {
 		}
 		assertEquals(expectedKeys, actualKeys);
 		assertEquals(expectedKeys, map1.keySet());
-		
+
 		final Set<Map.Entry<String, Unit>> expectedEntries = Set.of(entry("U", U),
 				entry("V", V), entry("W", W));
 		final Set<Map.Entry<String, Unit>> actualEntries = new HashSet<>();
@@ -415,7 +415,7 @@ class UnitDatabaseTest {
 		assertEquals(expectedEntries, actualEntries);
 		assertEquals(expectedEntries, map1.entrySet());
 	}
-	
+
 	/**
 	 * Test that prefixes correctly apply to units.
 	 * 
@@ -425,28 +425,28 @@ class UnitDatabaseTest {
 	@Test
 	public void testPrefixes() {
 		final UnitDatabase database = new UnitDatabase();
-		
+
 		database.addUnit("U", U);
 		database.addUnit("V", V);
 		database.addUnit("W", W);
-		
+
 		database.addPrefix("A", A);
 		database.addPrefix("B", B);
 		database.addPrefix("C", C);
-		
+
 		// test the getPrefixesFromName method
 		final List<UnitPrefix> expected = Arrays.asList(C, B, A);
 		assertEquals(expected, database.getPrefixesFromName("ABCU"));
-		
+
 		// get the product
 		final Unit abcuNonlinear = database.getUnit("ABCU");
 		assert abcuNonlinear instanceof LinearUnit;
-		
+
 		final LinearUnit abcu = (LinearUnit) abcuNonlinear;
 		assertEquals(A.getMultiplier() * B.getMultiplier() * C.getMultiplier(),
 				abcu.getConversionFactor(), 1e-15);
 	}
-	
+
 	/**
 	 * Tests the functionnalites of the prefixless unit map.
 	 * 
@@ -462,19 +462,19 @@ class UnitDatabaseTest {
 		final UnitDatabase database = new UnitDatabase();
 		final Map<String, Unit> prefixlessUnits = database
 				.unitMapPrefixless(true);
-		
+
 		database.addUnit("U", U);
 		database.addUnit("V", V);
 		database.addUnit("W", W);
-		
+
 		// this should work because the map should be an auto-updating view
 		assertTrue(prefixlessUnits.containsKey("U"));
 		assertFalse(prefixlessUnits.containsKey("Z"));
-		
+
 		assertTrue(prefixlessUnits.containsValue(U));
 		assertFalse(prefixlessUnits.containsValue(NONLINEAR));
 	}
-	
+
 	/**
 	 * Tests that the database correctly stores and retrieves units, ignoring
 	 * prefixes.
@@ -485,18 +485,18 @@ class UnitDatabaseTest {
 	@Test
 	public void testPrefixlessUnits() {
 		final UnitDatabase database = new UnitDatabase();
-		
+
 		database.addUnit("U", U);
 		database.addUnit("V", V);
 		database.addUnit("W", W);
-		
+
 		assertTrue(database.containsUnitName("U"));
 		assertFalse(database.containsUnitName("Z"));
-		
+
 		assertEquals(U, database.getUnit("U"));
 		assertThrows(NoSuchElementException.class, () -> database.getUnit("Z"));
 	}
-	
+
 	@Test
 	public void testRemovableDuplicates() {
 		final Map<String, Unit> unitMap = new HashMap<>();
@@ -504,7 +504,7 @@ class UnitDatabaseTest {
 		unitMap.put("metre", Metric.METRE);
 		unitMap.put("m", Metric.METRE);
 		unitMap.put("second", Metric.SECOND);
-		
+
 		assertTrue(UnitDatabase.isRemovableDuplicate(unitMap,
 				entry("m", Metric.METRE)));
 		assertTrue(UnitDatabase.isRemovableDuplicate(unitMap,
@@ -514,28 +514,28 @@ class UnitDatabaseTest {
 		assertFalse(UnitDatabase.isRemovableDuplicate(unitMap,
 				entry("second", Metric.SECOND)));
 	}
-	
+
 	@Test
 	public void testToString() {
 		final UnitDatabase database = new UnitDatabase();
-		
+
 		database.addUnit("J", J);
 		database.addUnit("K", J);
-		
+
 		database.addPrefix("A", A);
 		database.addPrefix("B", B);
 		database.addPrefix("C", C);
-		
+
 		if ("Unit Database with 1 units, 3 unit prefixes and 0 dimensions"
 				.equals(database.toString())) {
 			fail("Database counts by number of units, not number of unit names.");
 		}
-		
+
 		assertEquals(
 				"Unit Database with 2 units, 3 unit prefixes and 0 dimensions",
 				database.toString());
 	}
-	
+
 	/**
 	 * Test that unit expressions return the correct value.
 	 * 
@@ -546,37 +546,37 @@ class UnitDatabaseTest {
 	public void testUnitExpressions() {
 		// load units
 		final UnitDatabase database = new UnitDatabase();
-		
+
 		database.addUnit("U", U);
 		database.addUnit("V", V);
 		database.addUnit("W", W);
 		database.addUnit("fj", J.times(5));
 		database.addUnit("ej", J.times(8));
-		
+
 		database.addPrefix("A", A);
 		database.addPrefix("B", B);
 		database.addPrefix("C", C);
-		
+
 		// first test - test prefixes and operations
 		final Unit expected1 = J.withPrefix(A).withPrefix(B).withPrefix(C)
 				.withPrefix(C);
 		final Unit actual1 = database.getUnitFromExpression("ABV * CU^2 / W / W");
-		
+
 		assertEquals(expected1, actual1);
-		
+
 		// second test - test addition and subtraction
 		final Unit expected2 = J.times(58);
 		final Unit actual2 = database.getUnitFromExpression("2 fj + 6 ej");
-		
+
 		assertEquals(expected2, actual2);
-		
+
 		// test incorrect expressions
 		assertThrows(IllegalArgumentException.class,
 				() -> database.getUnitFromExpression("U + V"));
 		assertThrows(IllegalArgumentException.class,
 				() -> database.getUnitFromExpression("U - V"));
 	}
-	
+
 	/**
 	 * Tests both the unit name iterator and the name-unit entry iterator
 	 * 
@@ -587,25 +587,25 @@ class UnitDatabaseTest {
 	public void testUnitIterator() {
 		// load units
 		final UnitDatabase database = new UnitDatabase();
-		
+
 		database.addUnit("J", J);
 		database.addUnit("K", K);
-		
+
 		database.addPrefix("A", A);
 		database.addPrefix("B", B);
 		database.addPrefix("C", C);
-		
+
 		final int NUM_UNITS = database.unitMapPrefixless(true).size();
 		final int NUM_PREFIXES = database.prefixMap(true).size();
-		
+
 		final Iterator<String> nameIterator = database.unitMap().keySet()
 				.iterator();
 		final Iterator<Entry<String, Unit>> entryIterator = database.unitMap()
 				.entrySet().iterator();
-		
+
 		int expectedLength = 1;
 		int unitsWithThisLengthSoFar = 0;
-		
+
 		// loop 1000 times
 		for (int i = 0; i < 1000; i++) {
 			// expected length of next
@@ -614,31 +614,31 @@ class UnitDatabaseTest {
 				expectedLength++;
 				unitsWithThisLengthSoFar = 0;
 			}
-			
+
 			// test that stuff is valid
 			final String nextName = nameIterator.next();
 			final Unit nextUnit = database.getUnit(nextName);
 			final Entry<String, Unit> nextEntry = entryIterator.next();
-			
+
 			assertEquals(expectedLength, nextName.length());
 			assertEquals(nextName, nextEntry.getKey());
 			assertEquals(nextUnit, nextEntry.getValue());
-			
+
 			unitsWithThisLengthSoFar++;
 		}
-		
+
 		// test toString for consistency
 		final String entryIteratorString = entryIterator.toString();
 		for (int i = 0; i < 3; i++) {
 			assertEquals(entryIteratorString, entryIterator.toString());
 		}
-		
+
 		final String nameIteratorString = nameIterator.toString();
 		for (int i = 0; i < 3; i++) {
 			assertEquals(nameIteratorString, nameIterator.toString());
 		}
 	}
-	
+
 	/**
 	 * Determine, given a unit name that could mean multiple things, which
 	 * meaning is chosen.
@@ -654,28 +654,28 @@ class UnitDatabaseTest {
 	public void testUnitPrefixCombinations() {
 		// load units
 		final UnitDatabase database = new UnitDatabase();
-		
+
 		database.addUnit("J", J);
-		
+
 		database.addPrefix("A", A);
 		database.addPrefix("B", B);
 		database.addPrefix("C", C);
 		database.addPrefix("AB", AB);
 		database.addPrefix("BC", BC);
-		
+
 		// test 1 - AB-C-J vs A-BC-J vs A-B-C-J
 		final Unit expected1 = J.withPrefix(AB).withPrefix(C);
 		final Unit actual1 = database.getUnit("ABCJ");
-		
+
 		assertEquals(expected1, actual1);
-		
+
 		// test 2 - ABC-J vs AB-CJ vs AB-C-J
 		database.addUnit("CJ", J.times(13));
 		database.addPrefix("ABC", UnitPrefix.valueOf(17));
-		
+
 		final Unit expected2 = J.times(17);
 		final Unit actual2 = database.getUnit("ABCJ");
-		
+
 		assertEquals(expected2, actual2);
 	}
 }
diff --git a/src/test/java/sevenUnits/unit/UnitTest.java b/src/test/java/sevenUnits/unit/UnitTest.java
index d3699ca..c93043b 100644
--- a/src/test/java/sevenUnits/unit/UnitTest.java
+++ b/src/test/java/sevenUnits/unit/UnitTest.java
@@ -42,17 +42,17 @@ import sevenUnits.utils.UncertainDouble;
 class UnitTest {
 	/** A random number generator */
 	private static final Random rng = ThreadLocalRandom.current();
-	
+
 	@Test
 	public void testAdditionAndSubtraction() {
 		final LinearUnit inch = Metric.METRE.times(0.0254)
 				.withName(NameSymbol.of("inch", "in"));
 		final LinearUnit foot = Metric.METRE.times(0.3048)
 				.withName(NameSymbol.of("foot", "ft"));
-		
+
 		assertEquals(inch.plus(foot), Metric.METRE.times(0.3302));
 		assertEquals(foot.minus(inch), Metric.METRE.times(0.2794));
-		
+
 		// test with LinearUnitValue
 		final LinearUnitValue value1 = LinearUnitValue.getExact(Metric.METRE, 15);
 		final LinearUnitValue value2 = LinearUnitValue.getExact(foot, 120);
@@ -60,70 +60,70 @@ class UnitTest {
 				0.5);
 		final LinearUnitValue value4 = LinearUnitValue.getExact(Metric.KILOGRAM,
 				60);
-		
+
 		// make sure addition is done correctly
 		assertEquals(51.576, value1.plus(value2).getValueExact(), 0.001);
 		assertEquals(15.5, value1.plus(value3).getValueExact());
 		assertEquals(52.076, value1.plus(value2).plus(value3).getValueExact(),
 				0.001);
-		
+
 		// make sure addition uses the correct unit, and is still associative
 		// (ignoring floating-point rounding errors)
 		assertEquals(Metric.METRE, value1.plus(value2).getUnit());
 		assertEquals(Metric.METRE, value1.plus(value2).plus(value3).getUnit());
 		assertEquals(foot, value2.plus(value1).getUnit());
 		assertTrue(value1.plus(value2).equals(value2.plus(value1), true));
-		
+
 		// make sure errors happen when they should
 		assertThrows(IllegalArgumentException.class, () -> value1.plus(value4));
 		assertThrows(IllegalArgumentException.class, () -> value1.minus(value4));
 	}
-	
+
 	@Test
 	public void testConversion() {
 		final LinearUnit metre = Metric.METRE;
 		final Unit inch = metre.times(0.0254);
-		
+
 		final UnitValue value = UnitValue.of(inch, 75);
-		
+
 		assertEquals(1.9, inch.convertTo(metre, 75), 0.01);
 		assertEquals(1.9, value.convertTo(metre).getValue(), 0.01);
-		
+
 		// try random stuff
 		for (int i = 0; i < 1000; i++) {
 			// initiate random values
 			final double conversionFactor = UnitTest.rng.nextDouble() * 1000000;
 			final double testValue = UnitTest.rng.nextDouble() * 1000000;
 			final double expected = testValue * conversionFactor;
-			
+
 			// test
 			final Unit unit = Metric.METRE.times(conversionFactor);
 			final double actual = unit.convertToBase(testValue);
-			
+
 			assertEquals(actual, expected,
 					expected * DecimalComparison.DOUBLE_EPSILON);
 		}
 	}
-	
+
 	@Test
 	public void testEquals() {
 		final LinearUnit metre = Metric.METRE;
 		final Unit meter = Metric.BaseUnits.METRE.asLinearUnit();
-		
+
 		assertEquals(metre, meter);
 	}
-	
+
 	@Test
 	public void testIsMetric() {
 		final Unit metre = Metric.METRE;
 		final Unit megasecond = Metric.SECOND.withPrefix(Metric.MEGA);
 		final Unit hour = Metric.HOUR;
-		
+
 		assertTrue(metre.isMetric());
 		assertTrue(megasecond.isMetric());
 		assertFalse(hour.isMetric());
 	}
-	
+
 	@Test
 	public void testMultiplicationAndDivision() {
 		// test unit-times-unit multiplication
@@ -131,29 +131,29 @@ class UnitTest {
 				.times(Metric.METRE.toExponent(2))
 				.dividedBy(Metric.SECOND.toExponent(2));
 		final LinearUnit actualJoule = Metric.JOULE;
-		
+
 		assertEquals(generatedJoule, actualJoule);
-		
+
 		// test multiplication by conversion factors
 		final LinearUnit kilometre = Metric.METRE.times(1000);
 		final LinearUnit hour = Metric.SECOND.times(3600);
 		final LinearUnit generatedKPH = kilometre.dividedBy(hour);
-		
+
 		final LinearUnit actualKPH = Metric.METRE.dividedBy(Metric.SECOND)
 				.dividedBy(3.6);
-		
+
 		assertEquals(generatedKPH, actualKPH);
 	}
-	
+
 	@Test
 	public void testPrefixes() {
 		final LinearUnit generatedKilometre = Metric.METRE
 				.withPrefix(Metric.KILO);
 		final LinearUnit actualKilometre = Metric.METRE.times(1000);
-		
+
 		assertEquals(generatedKilometre, actualKilometre);
 	}
-	
+
 	/**
 	 * Tests converting an uncertain LinearUnitValue to a string.
 	 * 
@@ -163,13 +163,13 @@ class UnitTest {
 	public void testValueToString1() {
 		final LinearUnitValue value = LinearUnitValue.of(Metric.METRE,
 				UncertainDouble.of(10, 0.24));
-		
-		assertEquals("(10.0 ± 0.2) m", value.toString());
-		assertEquals("(10.0 ± 0.2) m",
+
+		assertEquals("(10.0 � 0.2) m", value.toString());
+		assertEquals("(10.0 � 0.2) m",
 				value.toString(true, RoundingMode.HALF_EVEN));
 		assertEquals("10.0 m", value.toString(false, RoundingMode.HALF_EVEN));
 	}
-	
+
 	/**
 	 * Tests converting a certain LinearUnitValue to a string.
 	 * 
@@ -179,13 +179,13 @@ class UnitTest {
 	public void testValueToString2() {
 		final LinearUnitValue value = LinearUnitValue.of(Metric.METRE,
 				UncertainDouble.of(10, 0));
-		
+
 		assertEquals("10.0 m", value.toString());
-		assertEquals("(10.0 ± 0.0) m",
+		assertEquals("(10.0 � 0.0) m",
 				value.toString(true, RoundingMode.HALF_EVEN));
 		assertEquals("10.0 m", value.toString(false, RoundingMode.HALF_EVEN));
 	}
-	
+
 	/**
 	 * Tests converting an unnamed LinearUnitValue to a string.
 	 * 
@@ -196,11 +196,11 @@ class UnitTest {
 		final LinearUnitValue value = LinearUnitValue.of(
 				Metric.METRE.withName(NameSymbol.EMPTY),
 				UncertainDouble.of(10, 0.24));
-		
+
 		assertEquals("10.0 unnamed unit (= 10.0 m)",
 				value.toString(false, RoundingMode.HALF_EVEN));
 	}
-	
+
 	/**
 	 * Tests converting a named UnitValue to a string.
 	 * 
@@ -209,10 +209,10 @@ class UnitTest {
 	@Test
 	public void testValueToString4() {
 		final UnitValue value = UnitValue.of(BritishImperial.FAHRENHEIT, 80);
-		
+
 		assertEquals("80.0 \u00B0F", value.toString());
 	}
-	
+
 	/**
 	 * Tests converting an unnamed UnitValue to a string.
 	 * 
@@ -222,7 +222,7 @@ class UnitTest {
 	public void testValueToString5() {
 		final UnitValue value = UnitValue
 				.of(USCustomary.FAHRENHEIT.withName(NameSymbol.EMPTY), 50);
-		
+
 		assertEquals("50.0 unnamed unit (= 283.15 K)", value.toString());
 	}
 }