From b59082c6b558705d4bd5effce2ae4b98c8a3ebe5 Mon Sep 17 00:00:00 2001
From: Adrien Hopkins <ahopk127@my.yorku.ca>
Date: Mon, 4 Oct 2021 18:26:58 -0500
Subject: Added tests for valid & invalid dimension files

---
 .../java/sevenUnits/unit/UnitDatabaseTest.java     | 68 +++++++++++++++++++++-
 1 file changed, 66 insertions(+), 2 deletions(-)

(limited to 'src/test/java')

diff --git a/src/test/java/sevenUnits/unit/UnitDatabaseTest.java b/src/test/java/sevenUnits/unit/UnitDatabaseTest.java
index 7612fc5..ed3b6b5 100644
--- a/src/test/java/sevenUnits/unit/UnitDatabaseTest.java
+++ b/src/test/java/sevenUnits/unit/UnitDatabaseTest.java
@@ -72,6 +72,23 @@ class UnitDatabaseTest {
 	private static final UnitPrefix AB = UnitPrefix.valueOf(7);
 	private static final UnitPrefix BC = UnitPrefix.valueOf(11);
 	
+	/**
+	 * Loads the dimensionfile at src/test/resources/[path] to the database
+	 * {@code loadTo}.
+	 *
+	 * @param loadTo database to load to
+	 * @param path   path of file to load
+	 * @since 2021-10-04
+	 */
+	private static void loadDimensionFile(UnitDatabase loadTo, String path) {
+		try (final InputStream testFile = UnitDatabaseTest.class
+				.getResourceAsStream(path)) {
+			loadTo.loadDimensionsFromStream(testFile);
+		} catch (final IOException e) {
+			fail(e.getClass() + " occurred upon loading file \"" + path + "\".");
+		}
+	}
+	
 	/**
 	 * Loads the unitfile at src/test/resources/[path] to the database
 	 * {@code loadTo}.
@@ -140,6 +157,27 @@ class UnitDatabaseTest {
 		assertThrows(IllegalStateException.class, () -> keySet.toArray());
 	}
 	
+	/**
+	 * A bunch of tests for invalid dimension files
+	 *
+	 * @param num which file to test
+	 * @since 2021-10-04
+	 */
+	@ParameterizedTest
+	@ValueSource(ints = { 1, 2, 3 })
+	public void testLoadingInvalidDimensionFile(int num) {
+		final UnitDatabase database = new UnitDatabase();
+		database.addDimension("LENGTH", Metric.Dimensions.LENGTH);
+		database.addDimension("MASS", Metric.Dimensions.MASS);
+		database.addDimension("TIME", Metric.Dimensions.TIME);
+		final String filename = String.format("/test-dimensionfile-invalid%d.txt",
+				num);
+		final RuntimeException e = assertThrows(RuntimeException.class,
+				() -> loadDimensionFile(database, filename));
+		assertTrue(e instanceof IllegalArgumentException
+				|| e instanceof NoSuchElementException);
+	}
+	
 	/**
 	 * A bunch of tests for invalid unit files
 	 *
@@ -148,12 +186,32 @@ class UnitDatabaseTest {
 	 */
 	@ParameterizedTest
 	@ValueSource(ints = { 1, 2, 3, 4, 5 })
-	public void testLoadingInvalidFile(int num) {
+	public void testLoadingInvalidUnitFile(int num) {
 		final UnitDatabase database = new UnitDatabase();
 		final String filename = String.format("/test-unitsfile-invalid%d.txt",
 				num);
-		assertThrows(IllegalArgumentException.class,
+		final RuntimeException e = assertThrows(RuntimeException.class,
 				() -> loadUnitsFile(database, filename));
+		assertTrue(e instanceof IllegalArgumentException
+				|| e instanceof NoSuchElementException);
+	}
+	
+	/**
+	 * Tests loading a valid dimension-file with some derived dimensions.
+	 * 
+	 * @since 2021-10-04
+	 */
+	@Test
+	public void testLoadingValidDimensions() {
+		final UnitDatabase database = new UnitDatabase();
+		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"));
+		
 	}
 	
 	/**
@@ -207,6 +265,12 @@ class UnitDatabaseTest {
 		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);
 	}
 	
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