Add some Unit Tests

Author: TheRealHaui

commons-vfs2/src/test/java/org/apache/commons/vfs2/filter/SizeFileFilterTest.java

@@ -19,6 +19,7 @@
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertFalse;
 import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.junit.jupiter.api.Assertions.assertThrows;
 
 import java.io.File;
 import java.io.IOException;
@@ -102,6 +103,11 @@ public static void beforeClass() throws IOException {
         zipFileObj = getZipFileObject(zipFile);
     }
 
+    @Test
+    public void testSizeFilterSizeNegative(){
+        assertThrows(IllegalArgumentException.class, () -> new SizeFileFilter(-1));
+    }
+
     @Test
     public void testSizeFileFilterLong() throws FileSystemException {
 

commons-vfs2/src/test/java/org/apache/commons/vfs2/util/URIUtilsTest.java

@@ -0,0 +1,34 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.commons.vfs2.util;
+
+import org.junit.jupiter.api.Test;
+
+import java.nio.charset.StandardCharsets;
+
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+
+class URIUtilsTest {
+
+    @Test
+    void testEncodePathThrowsIllegalArgumentException() {
+        assertThrows(IllegalArgumentException.class, () -> URIUtils.encodePath(null, StandardCharsets.UTF_8.name()));
+        assertThrows(IllegalArgumentException.class, () -> URIUtils.encodePath("", ""));
+    }
+
+}