Add missing unit tests

Signed-off-by: Gary O'Neall <gary@sourceauditor.com>

Author: goneall

src/test/java/org/spdx/utility/compare/LicenseCompareHelperTest.java

@@ -975,4 +975,18 @@ public void testImageMagikTextWithin() throws InvalidSPDXAnalysisException, Spdx
         assertFalse(LicenseCompareHelper.isStandardLicenseWithinText(licText, lic));
     }
 
+	private void assertAPIConsistency(final String licenseId, final String text) throws InvalidSPDXAnalysisException, SpdxCompareException {
+		final String inconsistencies = CompareConsistencyHelper.explainCompareInconsistencies(licenseId, text);
+		assertNull(inconsistencies, inconsistencies);
+	}
+
+	public void testAPIConsistency() throws InvalidSPDXAnalysisException, SpdxCompareException, IOException {
+		assertAPIConsistency("MIT",          UnitTestHelper.fileToText(MIT_2_SPACES));
+		assertAPIConsistency("BSD-2-Clause", UnitTestHelper.fileToText(BSD_2_CLAUSE_NL));
+
+		if (UnitTestHelper.runSlowTests()) {
+			assertAPIConsistency("GPL-2.0-only", UnitTestHelper.fileToText(GPL_2_TEXT));
+			assertAPIConsistency("MPL-2.0",      UnitTestHelper.fileToText(MPL_2_FROM_MOZILLA_FILE));
+		}
+	}
 }