1 // Protocol Buffers - Google's data interchange format
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30 
31 package com.google.protobuf;
32 
33 import java.io.UnsupportedEncodingException;
34 import java.util.Iterator;
35 
36 /**
37  * This class tests {@link RopeByteString#substring(int, int)} by inheriting the tests from
38  * {@link LiteralByteStringTest}.  Only a couple of methods are overridden.
39  *
40  * @author carlanton@google.com (Carl Haverl)
41  */
42 public class RopeByteStringSubstringTest extends LiteralByteStringTest {
43 
44   @Override
setUp()45   protected void setUp() throws Exception {
46     classUnderTest = "RopeByteString";
47     byte[] sourceBytes = ByteStringTest.getTestBytes(22341, 22337766L);
48     Iterator<ByteString> iter = ByteStringTest.makeConcretePieces(sourceBytes).iterator();
49     ByteString sourceString = iter.next();
50     while (iter.hasNext()) {
51       sourceString = sourceString.concat(iter.next());
52     }
53 
54     int from = 1130;
55     int to = sourceBytes.length - 5555;
56     stringUnderTest = sourceString.substring(from, to);
57     referenceBytes = new byte[to - from];
58     System.arraycopy(sourceBytes, from, referenceBytes, 0, to - from);
59     expectedHashCode = -1259260680;
60   }
61 
62   @Override
testGetTreeDepth()63   public void testGetTreeDepth() {
64     assertEquals(classUnderTest + " must have the expected tree depth",
65         3, stringUnderTest.getTreeDepth());
66   }
67 
68   @Override
testToString()69   public void testToString() throws UnsupportedEncodingException {
70     String sourceString = "I love unicode \u1234\u5678 characters";
71     ByteString sourceByteString = ByteString.copyFromUtf8(sourceString);
72     int copies = 250;
73 
74     // By building the RopeByteString by concatenating, this is actually a fairly strenuous test.
75     StringBuilder builder = new StringBuilder(copies * sourceString.length());
76     ByteString unicode = ByteString.EMPTY;
77     for (int i = 0; i < copies; ++i) {
78       builder.append(sourceString);
79       unicode = RopeByteString.concatenate(unicode, sourceByteString);
80     }
81     String testString = builder.toString();
82 
83     // Do the substring part
84     testString = testString.substring(2, testString.length() - 6);
85     unicode = unicode.substring(2, unicode.size() - 6);
86 
87     assertEquals(classUnderTest + " from string must have the expected type",
88         classUnderTest, getActualClassName(unicode));
89     String roundTripString = unicode.toString(UTF_8);
90     assertEquals(classUnderTest + " unicode bytes must match",
91         testString, roundTripString);
92     ByteString flatString = ByteString.copyFromUtf8(testString);
93     assertEquals(classUnderTest + " string must equal the flat string", flatString, unicode);
94     assertEquals(classUnderTest + " string must must have same hashCode as the flat string",
95         flatString.hashCode(), unicode.hashCode());
96   }
97 
98   @Override
testCharsetToString()99   public void testCharsetToString() {
100     String sourceString = "I love unicode \u1234\u5678 characters";
101     ByteString sourceByteString = ByteString.copyFromUtf8(sourceString);
102     int copies = 250;
103 
104     // By building the RopeByteString by concatenating, this is actually a fairly strenuous test.
105     StringBuilder builder = new StringBuilder(copies * sourceString.length());
106     ByteString unicode = ByteString.EMPTY;
107     for (int i = 0; i < copies; ++i) {
108       builder.append(sourceString);
109       unicode = RopeByteString.concatenate(unicode, sourceByteString);
110     }
111     String testString = builder.toString();
112 
113     // Do the substring part
114     testString = testString.substring(2, testString.length() - 6);
115     unicode = unicode.substring(2, unicode.size() - 6);
116 
117     assertEquals(classUnderTest + " from string must have the expected type",
118         classUnderTest, getActualClassName(unicode));
119     String roundTripString = unicode.toString(Internal.UTF_8);
120     assertEquals(classUnderTest + " unicode bytes must match",
121         testString, roundTripString);
122     ByteString flatString = ByteString.copyFromUtf8(testString);
123     assertEquals(classUnderTest + " string must equal the flat string", flatString, unicode);
124     assertEquals(classUnderTest + " string must must have same hashCode as the flat string",
125         flatString.hashCode(), unicode.hashCode());
126   }
127 }
128