1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * https://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.apache.commons.io.output;
18
19 import static org.junit.jupiter.api.Assertions.assertThrows;
20
21 import java.io.IOException;
22
23 import org.junit.jupiter.api.Test;
24
25 /**
26 * Tests {@link ClosedWriter}.
27 */
28 class ClosedWriterTest {
29
30 /**
31 * Test the {@code flush()} method.
32 */
33 @Test
34 void testFlush() throws IOException {
35 try (ClosedWriter cw = new ClosedWriter()) {
36 assertThrows(IOException.class, () -> cw.flush());
37 }
38 }
39
40 /**
41 * Test the {@code write(cbuf, off, len)} method.
42 */
43 @Test
44 void testWrite() throws IOException {
45 try (ClosedWriter cw = new ClosedWriter()) {
46 final char[] cbuf = new char[1];
47 assertThrows(IOException.class, () -> cw.write(new char[0], 0, 1));
48 // In writers, testing for closed always comes before argument validation
49 assertThrows(IOException.class, () -> cw.write(cbuf, -1, 0));
50 assertThrows(IOException.class, () -> cw.write(cbuf, 0, -1));
51 assertThrows(IOException.class, () -> cw.write(cbuf, 0, 2));
52 assertThrows(IOException.class, () -> cw.write((char[]) null, 0, 0));
53 }
54 }
55
56 }