-
Notifications
You must be signed in to change notification settings - Fork 2.3k
/
ByteCodeUtilsTest.java
207 lines (174 loc) · 6.81 KB
/
ByteCodeUtilsTest.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
/*
* Copyright (c) 2002-2016 "Neo Technology,"
* Network Engine for Objects in Lund AB [http://neotechnology.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.codegen;
import org.junit.Test;
import java.util.List;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.equalTo;
import static org.junit.Assert.assertNull;
import static org.neo4j.codegen.ByteCodeUtils.desc;
import static org.neo4j.codegen.ByteCodeUtils.exceptions;
import static org.neo4j.codegen.ByteCodeUtils.signature;
import static org.neo4j.codegen.ByteCodeUtils.typeName;
import static org.neo4j.codegen.MethodDeclaration.method;
import static org.neo4j.codegen.Parameter.param;
import static org.neo4j.codegen.TypeReference.extending;
import static org.neo4j.codegen.TypeReference.typeParameter;
import static org.neo4j.codegen.TypeReference.typeReference;
public class ByteCodeUtilsTest
{
@Test
public void shouldTranslateTypeNames()
{
//primitive types
assertTypeName( int.class, "I" );
assertTypeName( byte.class, "B" );
assertTypeName( short.class, "S" );
assertTypeName( char.class, "C" );
assertTypeName( float.class, "F" );
assertTypeName( double.class, "D" );
assertTypeName( boolean.class, "Z" );
assertTypeName( void.class, "V" );
//primitive array types
assertTypeName( int[].class, "[I" );
assertTypeName( byte[].class, "[B" );
assertTypeName( short[].class, "[S" );
assertTypeName( char[].class, "[C" );
assertTypeName( float[].class, "[F" );
assertTypeName( double[].class, "[D" );
assertTypeName( boolean[].class, "[Z" );
//reference type
assertTypeName( String.class, "Ljava/lang/String;" );
//reference array type
assertTypeName( String[].class, "[Ljava/lang/String;" );
}
@Test
public void shouldDescribeMethodWithNoParameters()
{
// GIVEN
TypeReference owner = typeReference( ByteCodeUtilsTest.class );
MethodDeclaration declaration = method( boolean.class, "foo" ).build( owner );
// WHEN
String description = desc( declaration );
// THEN
assertThat( description, equalTo( "()Z" ) );
}
@Test
public void shouldDescribeMethodWithParameters()
{
// GIVEN
TypeReference owner = typeReference( ByteCodeUtilsTest.class );
MethodDeclaration declaration =
method( List.class, "foo", param( String.class, "string" ), param( char[].class, "chararray" ) )
.build( owner );
// WHEN
String description = desc( declaration );
// THEN
assertThat( description, equalTo( "(Ljava/lang/String;[C)Ljava/util/List;" ) );
}
@Test
public void signatureShouldBeNullWhenNotGeneric()
{
// GIVEN
TypeReference reference = typeReference( String.class );
// WHEN
String signature = signature( reference );
// THEN
assertNull( signature );
}
@Test
public void signatureShouldBeCorrectWhenGeneric()
{
// GIVEN
TypeReference reference = TypeReference.parameterizedType( List.class, String.class );
// WHEN
String signature = signature( reference );
// THEN
assertThat( signature, equalTo( "Ljava/util/List<Ljava/lang/String;>;" ) );
}
@Test
public void methodSignatureShouldBeNullWhenNotGeneric()
{
// GIVEN
TypeReference owner = typeReference( ByteCodeUtilsTest.class );
MethodDeclaration declaration =
method( String.class, "foo", param( String.class, "string" ), param( char[].class, "chararray" ) )
.build( owner );
// WHEN
String signature = signature( declaration );
// THEN
assertNull( signature );
}
@Test
public void methodSignatureShouldBeCorrectWhenGeneric()
{
// GIVEN
TypeReference owner = typeReference( ByteCodeUtilsTest.class );
MethodDeclaration declaration =
method( TypeReference.parameterizedType( List.class, String.class ), "foo", param( String.class, "string" ) )
.build( owner );
// WHEN
String signature = signature( declaration );
// THEN
assertThat( signature, equalTo( "(Ljava/lang/String;)Ljava/util/List<Ljava/lang/String;>;" ) );
}
@Test
public void shouldHandleGenericReturnType()
{
// GIVEN
TypeReference owner = typeReference( ByteCodeUtilsTest.class );
MethodDeclaration declaration = MethodDeclaration.method( typeParameter( "T" ), "fail")
.parameterizedWith( "T", extending( Object.class ) )
.build( owner );
// WHEN
String desc = desc( declaration );
String signature = signature( declaration );
// THEN
assertThat(desc, equalTo("()Ljava/lang/Object;"));
assertThat(signature,
equalTo( "<T:Ljava/lang/Object;>()TT;" ));
}
@Test
public void shouldHandleGenericThrows()
{
// GIVEN
TypeReference owner = typeReference( ByteCodeUtilsTest.class );
MethodDeclaration declaration = MethodDeclaration.method( void.class, "fail",
param( TypeReference.parameterizedType( CodeGenerationTest.Thrower.class, typeParameter( "E" ) ), "thrower" ) )
.parameterizedWith( "E", extending( Exception.class ) )
.throwsException( typeParameter( "E" ) ).build( owner );
// WHEN
String signature = signature( declaration );
String[] exceptions = exceptions( declaration );
// THEN
assertThat(signature,
equalTo( "<E:Ljava/lang/Exception;>(Lorg/neo4j/codegen/CodeGenerationTest$Thrower<TE;>;)V^TE;" ));
assertThat( exceptions, equalTo(new String[]{"java/lang/Exception"} ));
}
private void assertTypeName(Class<?> type, String expected)
{
// GIVEN
TypeReference reference = typeReference( type );
// WHEN
String byteCodeName = typeName( reference );
// THEN
assertThat( byteCodeName, equalTo( expected ) );
}
}