1#region Copyright notice and license
2// Protocol Buffers - Google's data interchange format
3// Copyright 2008 Google Inc.  All rights reserved.
4// https://developers.google.com/protocol-buffers/
5//
6// Redistribution and use in source and binary forms, with or without
7// modification, are permitted provided that the following conditions are
8// met:
9//
10//     * Redistributions of source code must retain the above copyright
11// notice, this list of conditions and the following disclaimer.
12//     * Redistributions in binary form must reproduce the above
13// copyright notice, this list of conditions and the following disclaimer
14// in the documentation and/or other materials provided with the
15// distribution.
16//     * Neither the name of Google Inc. nor the names of its
17// contributors may be used to endorse or promote products derived from
18// this software without specific prior written permission.
19//
20// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31#endregion
32
33using System;
34using System.Text;
35using NUnit.Framework;
36
37namespace Google.Protobuf
38{
39    public class ByteStringTest
40    {
41        [Test]
42        public void Equality()
43        {
44            ByteString b1 = ByteString.CopyFrom(1, 2, 3);
45            ByteString b2 = ByteString.CopyFrom(1, 2, 3);
46            ByteString b3 = ByteString.CopyFrom(1, 2, 4);
47            ByteString b4 = ByteString.CopyFrom(1, 2, 3, 4);
48            EqualityTester.AssertEquality(b1, b1);
49            EqualityTester.AssertEquality(b1, b2);
50            EqualityTester.AssertInequality(b1, b3);
51            EqualityTester.AssertInequality(b1, b4);
52            EqualityTester.AssertInequality(b1, null);
53#pragma warning disable 1718 // Deliberately calling ==(b1, b1) and !=(b1, b1)
54            Assert.IsTrue(b1 == b1);
55            Assert.IsTrue(b1 == b2);
56            Assert.IsFalse(b1 == b3);
57            Assert.IsFalse(b1 == b4);
58            Assert.IsFalse(b1 == null);
59            Assert.IsTrue((ByteString) null == null);
60            Assert.IsFalse(b1 != b1);
61            Assert.IsFalse(b1 != b2);
62#pragma warning disable 1718
63            Assert.IsTrue(b1 != b3);
64            Assert.IsTrue(b1 != b4);
65            Assert.IsTrue(b1 != null);
66            Assert.IsFalse((ByteString) null != null);
67        }
68
69        [Test]
70        public void EmptyByteStringHasZeroSize()
71        {
72            Assert.AreEqual(0, ByteString.Empty.Length);
73        }
74
75        [Test]
76        public void CopyFromStringWithExplicitEncoding()
77        {
78            ByteString bs = ByteString.CopyFrom("AB", Encoding.Unicode);
79            Assert.AreEqual(4, bs.Length);
80            Assert.AreEqual(65, bs[0]);
81            Assert.AreEqual(0, bs[1]);
82            Assert.AreEqual(66, bs[2]);
83            Assert.AreEqual(0, bs[3]);
84        }
85
86        [Test]
87        public void IsEmptyWhenEmpty()
88        {
89            Assert.IsTrue(ByteString.CopyFromUtf8("").IsEmpty);
90        }
91
92        [Test]
93        public void IsEmptyWhenNotEmpty()
94        {
95            Assert.IsFalse(ByteString.CopyFromUtf8("X").IsEmpty);
96        }
97
98        [Test]
99        public void CopyFromByteArrayCopiesContents()
100        {
101            byte[] data = new byte[1];
102            data[0] = 10;
103            ByteString bs = ByteString.CopyFrom(data);
104            Assert.AreEqual(10, bs[0]);
105            data[0] = 5;
106            Assert.AreEqual(10, bs[0]);
107        }
108
109        [Test]
110        public void ToByteArrayCopiesContents()
111        {
112            ByteString bs = ByteString.CopyFromUtf8("Hello");
113            byte[] data = bs.ToByteArray();
114            Assert.AreEqual((byte)'H', data[0]);
115            Assert.AreEqual((byte)'H', bs[0]);
116            data[0] = 0;
117            Assert.AreEqual(0, data[0]);
118            Assert.AreEqual((byte)'H', bs[0]);
119        }
120
121        [Test]
122        public void CopyFromUtf8UsesUtf8()
123        {
124            ByteString bs = ByteString.CopyFromUtf8("\u20ac");
125            Assert.AreEqual(3, bs.Length);
126            Assert.AreEqual(0xe2, bs[0]);
127            Assert.AreEqual(0x82, bs[1]);
128            Assert.AreEqual(0xac, bs[2]);
129        }
130
131        [Test]
132        public void CopyFromPortion()
133        {
134            byte[] data = new byte[] {0, 1, 2, 3, 4, 5, 6};
135            ByteString bs = ByteString.CopyFrom(data, 2, 3);
136            Assert.AreEqual(3, bs.Length);
137            Assert.AreEqual(2, bs[0]);
138            Assert.AreEqual(3, bs[1]);
139        }
140
141        [Test]
142        public void ToStringUtf8()
143        {
144            ByteString bs = ByteString.CopyFromUtf8("\u20ac");
145            Assert.AreEqual("\u20ac", bs.ToStringUtf8());
146        }
147
148        [Test]
149        public void ToStringWithExplicitEncoding()
150        {
151            ByteString bs = ByteString.CopyFrom("\u20ac", Encoding.Unicode);
152            Assert.AreEqual("\u20ac", bs.ToString(Encoding.Unicode));
153        }
154
155        [Test]
156        public void FromBase64_WithText()
157        {
158            byte[] data = new byte[] {0, 1, 2, 3, 4, 5, 6};
159            string base64 = Convert.ToBase64String(data);
160            ByteString bs = ByteString.FromBase64(base64);
161            Assert.AreEqual(data, bs.ToByteArray());
162        }
163
164        [Test]
165        public void FromBase64_Empty()
166        {
167            // Optimization which also fixes issue 61.
168            Assert.AreSame(ByteString.Empty, ByteString.FromBase64(""));
169        }
170    }
171}