7 files changed, 29 insertions, 1 deletions
diff --git a/src/test/java/sevenUnits/unit/UnitDatabaseTest.java b/src/test/java/sevenUnits/unit/UnitDatabaseTest.java
index 15bebcb..31323a7 100644
--- a/src/test/java/sevenUnits/unit/UnitDatabaseTest.java
+++ b/src/test/java/sevenUnits/unit/UnitDatabaseTest.java
@@ -33,6 +33,8 @@ import java.util.NoSuchElementException;
 import java.util.Set;
 
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.ValueSource;
 
 /**
  * A test for the {@link UnitDatabase} class. This is NOT part of this program's
@@ -112,6 +114,22 @@ class UnitDatabaseTest {
 	}
 	
 	/**
+	 * A bunch of tests for invalid unit files
+	 *
+	 * @param num which file to test
+	 * @since 2021-09-27
+	 */
+	@ParameterizedTest
+	@ValueSource(ints = { 1, 2, 3, 4, 5 })
+	public void testLoadingInvalidFile(int num) {
+		final UnitDatabase database = new UnitDatabase();
+		final String filename = String.format("/test-unitsfile-invalid%d.txt",
+				num);
+		assertThrows(IllegalArgumentException.class,
+				() -> loadUnitsFile(database, filename));
+	}
+	
+	/**
 	 * Tests loading a valid unitfile with some prefixes and no units.
 	 * 
 	 * @since 2021-09-22
@@ -161,6 +179,8 @@ class UnitDatabaseTest {
 				.times(A.getMultiplier() + C.getMultiplier() - B.getMultiplier());
 		final Unit actual3 = database.getUnit("test3");
 		assertEquals(expected3, actual3);
+		
+		assertTrue(System.err.toString().length() > 0);
 	}
 	
 	/**
diff --git a/src/test/resources/test-unitsfile-invalid1.txt b/src/test/resources/test-unitsfile-invalid1.txt
new file mode 100644
index 0000000..813bf54
--- /dev/null
+++ b/src/test/resources/test-unitsfile-invalid1.txt
@@ -0,0 +1 @@
+justaunit
+\ No newline at end of file
diff --git a/src/test/resources/test-unitsfile-invalid2.txt b/src/test/resources/test-unitsfile-invalid2.txt
new file mode 100644
index 0000000..890ed13
--- /dev/null
+++ b/src/test/resources/test-unitsfile-invalid2.txt
@@ -0,0 +1 @@
+nonexistent		!
diff --git a/src/test/resources/test-unitsfile-invalid3.txt b/src/test/resources/test-unitsfile-invalid3.txt
new file mode 100644
index 0000000..88d3c65
--- /dev/null
+++ b/src/test/resources/test-unitsfile-invalid3.txt
@@ -0,0 +1 @@
+badunit	^
diff --git a/src/test/resources/test-unitsfile-invalid4.txt b/src/test/resources/test-unitsfile-invalid4.txt
new file mode 100644
index 0000000..0fbc514
--- /dev/null
+++ b/src/test/resources/test-unitsfile-invalid4.txt
@@ -0,0 +1 @@
+badprefix-		* 35
+\ No newline at end of file
diff --git a/src/test/resources/test-unitsfile-invalid5.txt b/src/test/resources/test-unitsfile-invalid5.txt
new file mode 100644
index 0000000..c561393
--- /dev/null
+++ b/src/test/resources/test-unitsfile-invalid5.txt
@@ -0,0 +1 @@
+anotherinvalidunit		(3 + 5) * (^) + 57
+\ No newline at end of file
diff --git a/src/test/resources/test-unitsfile-valid1.txt b/src/test/resources/test-unitsfile-valid1.txt
index 704fd7c..1ea6cd9 100644
--- a/src/test/resources/test-unitsfile-valid1.txt
+++ b/src/test/resources/test-unitsfile-valid1.txt
@@ -1,3 +1,6 @@
+U				!
+V				!
+
 test1			CBAU
 test2			BW CV
-test3		AU + CU - BU
-\ No newline at end of file
+test3 		AU + CU - BU  # easily the most complex one yet
+\ No newline at end of file