1 /*
2 * Copyright (c) 2011, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 /**
25 * @test
26 * @bug 7000511 8190577
27 * @summary PrintStream, PrintWriter, Formatter, Scanner leave files open when
28 * exception thrown
29 */
30
31 import java.io.File;
32 import java.io.FileInputStream;
33 import java.io.FileOutputStream;
34 import java.io.FileNotFoundException;
35 import java.io.IOException;
36 import java.nio.charset.Charset;
37 import java.nio.file.Files;
38 import java.util.Scanner;
39
40 public class FailingConstructors {
41 static final String fileName = "FailingConstructorsTest";
42 static final String UNSUPPORTED_CHARSET = "unknownCharset";
43 static final String FILE_CONTENTS = "This is a small file!";
44
45 private static void realMain(String[] args) throws Throwable {
46 test(false, new File(fileName));
47
48 /* create the file and write its contents */
49 File file = File.createTempFile(fileName, null);
50 file.deleteOnExit();
51 Files.write(file.toPath(), FILE_CONTENTS.getBytes());
52
53 test(true, file);
54 file.delete();
55 }
56
57 private static void test(boolean exists, File file) throws Throwable {
58 /* Scanner(File source, String charsetName) */
59 try {
60 new Scanner(file, UNSUPPORTED_CHARSET);
61 fail();
62 } catch(FileNotFoundException|IllegalArgumentException e) {
63 pass();
64 }
65
66 check(exists, file);
67
68 try {
69 new Scanner(file, (String)null);
70 fail();
71 } catch(FileNotFoundException|NullPointerException e) {
72 pass();
73 }
74
75 try {
76 new Scanner(file, (Charset)null);
77 fail();
78 } catch(FileNotFoundException|NullPointerException e) {
79 pass();
80 }
81
82 check(exists, file);
83
84 /* Scanner(FileRef source, String charsetName) */
85 try {
86 new Scanner(file.toPath(), UNSUPPORTED_CHARSET);
87 fail();
88 } catch(FileNotFoundException|IllegalArgumentException e) {
89 pass();
90 }
91
92 check(exists, file);
93
94 try {
95 new Scanner(file.toPath(), (String)null);
96 fail();
97 } catch(FileNotFoundException|NullPointerException e) {
98 pass();
99 }
100
101 try {
102 new Scanner(file.toPath(), (Charset)null);
103 fail();
104 } catch(FileNotFoundException|NullPointerException e) {
105 pass();
106 }
107
108 check(exists, file);
109 }
110
111 private static void check(boolean exists, File file) {
112 if (exists) {
113 /* the file should be unchanged */
114 verifyContents(file);
115 } else {
116 /* the file should not have been created */
117 if (file.exists()) { fail(file + " should not have been created"); }
118 }
119 }
120
121 private static void verifyContents(File file) {
122 try (FileInputStream fis = new FileInputStream(file)) {
123 byte[] contents = FILE_CONTENTS.getBytes();
124 int read, count = 0;
125 while ((read = fis.read()) != -1) {
126 if (read != contents[count++]) {
127 fail("file contents have been altered");
128 return;
129 }
130 }
131 } catch (IOException ioe) {
132 unexpected(ioe);
133 }
134 }
135
136 //--------------------- Infrastructure ---------------------------
137 static volatile int passed = 0, failed = 0;
138 static void pass() {passed++;}
139 static void fail() {failed++; Thread.dumpStack();}
140 static void fail(String message) {System.out.println(message); fail(); }
141 static void unexpected(Throwable t) {failed++; t.printStackTrace();}
142 public static void main(String[] args) throws Throwable {
143 try {realMain(args);} catch (Throwable t) {unexpected(t);}
144 System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
145 if (failed > 0) throw new AssertionError("Some tests failed");}
146 }