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
|
/*
* Copyright (C) 2015 Square, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.squareup.javapoet;
import java.io.IOException;
import java.net.URI;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
import java.util.Collections;
import java.util.Locale;
import java.util.concurrent.Callable;
import javax.lang.model.element.Modifier;
import javax.tools.DiagnosticCollector;
import javax.tools.JavaCompiler;
import javax.tools.JavaCompiler.CompilationTask;
import javax.tools.JavaFileObject;
import javax.tools.JavaFileObject.Kind;
import javax.tools.StandardJavaFileManager;
import javax.tools.StandardLocation;
import javax.tools.ToolProvider;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TemporaryFolder;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
import com.google.common.io.ByteStreams;
import static com.google.common.truth.Truth.assertThat;
@RunWith(JUnit4.class)
public class FileReadingTest {
// Used for storing compilation output.
@Rule public final TemporaryFolder temporaryFolder = new TemporaryFolder();
@Test public void javaFileObjectUri() {
TypeSpec type = TypeSpec.classBuilder("Test").build();
assertThat(JavaFile.builder("", type).build().toJavaFileObject().toUri())
.isEqualTo(URI.create("Test.java"));
assertThat(JavaFile.builder("foo", type).build().toJavaFileObject().toUri())
.isEqualTo(URI.create("foo/Test.java"));
assertThat(JavaFile.builder("com.example", type).build().toJavaFileObject().toUri())
.isEqualTo(URI.create("com/example/Test.java"));
}
@Test public void javaFileObjectKind() {
JavaFile javaFile = JavaFile.builder("", TypeSpec.classBuilder("Test").build()).build();
assertThat(javaFile.toJavaFileObject().getKind()).isEqualTo(Kind.SOURCE);
}
@Test public void javaFileObjectCharacterContent() throws IOException {
TypeSpec type = TypeSpec.classBuilder("Test")
.addJavadoc("Testing, 1, 2, 3!")
.addMethod(MethodSpec.methodBuilder("fooBar").build())
.build();
JavaFile javaFile = JavaFile.builder("foo", type).build();
JavaFileObject javaFileObject = javaFile.toJavaFileObject();
// We can never have encoding issues (everything is in process)
assertThat(javaFileObject.getCharContent(true)).isEqualTo(javaFile.toString());
assertThat(javaFileObject.getCharContent(false)).isEqualTo(javaFile.toString());
}
@Test public void javaFileObjectInputStream() throws IOException {
JavaFile javaFile = JavaFile.builder("foo", TypeSpec.classBuilder("Test").build())
.addFileComment("\u00A9 Copyright character gets you everytime")
.build();
byte[] bytes = ByteStreams.toByteArray(javaFile.toJavaFileObject().openInputStream());
// Be explicit with the default charset to assert the implicit behavior in the code
assertThat(bytes).isEqualTo(javaFile.toString().getBytes(Charset.defaultCharset()));
}
@Test public void compileJavaFile() throws Exception {
final String value = "Hello World!";
TypeSpec type = TypeSpec.classBuilder("Test")
.addModifiers(Modifier.PUBLIC)
.addSuperinterface(ParameterizedTypeName.get(Callable.class, String.class))
.addMethod(MethodSpec.methodBuilder("call")
.returns(String.class)
.addModifiers(Modifier.PUBLIC)
.addStatement("return $S", value)
.build())
.build();
JavaFile javaFile = JavaFile.builder("foo", type).build();
JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
DiagnosticCollector<JavaFileObject> diagnosticCollector = new DiagnosticCollector<>();
StandardJavaFileManager fileManager = compiler.getStandardFileManager(diagnosticCollector,
Locale.getDefault(), StandardCharsets.UTF_8);
fileManager.setLocation(StandardLocation.CLASS_OUTPUT,
Collections.singleton(temporaryFolder.newFolder()));
CompilationTask task = compiler.getTask(null,
fileManager,
diagnosticCollector,
Collections.<String>emptySet(),
Collections.<String>emptySet(),
Collections.singleton(javaFile.toJavaFileObject()));
assertThat(task.call()).isTrue();
assertThat(diagnosticCollector.getDiagnostics()).isEmpty();
ClassLoader loader = fileManager.getClassLoader(StandardLocation.CLASS_OUTPUT);
Callable<?> test = Class.forName("foo.Test", true, loader).asSubclass(Callable.class).newInstance();
assertThat(Callable.class.getMethod("call").invoke(test)).isEqualTo(value);
}
}
|
