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/*
* Copyright (C) 2014 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 com.google.common.jimfs.Configuration;
import com.google.common.jimfs.Jimfs;
import java.io.File;
import java.io.IOException;
import java.nio.file.FileSystem;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Date;
import javax.lang.model.element.Element;
import javax.lang.model.element.Modifier;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TemporaryFolder;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
import org.mockito.Mockito;
import static com.google.common.truth.Truth.assertThat;
import static java.nio.charset.StandardCharsets.UTF_8;
import static org.junit.Assert.fail;
@RunWith(JUnit4.class)
public final class FileWritingTest {
// Used for testing java.io File behavior.
@Rule public final TemporaryFolder tmp = new TemporaryFolder();
// Used for testing java.nio.file Path behavior.
private final FileSystem fs = Jimfs.newFileSystem(Configuration.unix());
private final Path fsRoot = fs.getRootDirectories().iterator().next();
// Used for testing annotation processor Filer behavior.
private final TestFiler filer = new TestFiler(fs, fsRoot);
@Test public void pathNotDirectory() throws IOException {
TypeSpec type = TypeSpec.classBuilder("Test").build();
JavaFile javaFile = JavaFile.builder("example", type).build();
Path path = fs.getPath("/foo/bar");
Files.createDirectories(path.getParent());
Files.createFile(path);
try {
javaFile.writeTo(path);
fail();
} catch (IllegalArgumentException e) {
assertThat(e.getMessage()).isEqualTo("path /foo/bar exists but is not a directory.");
}
}
@Test public void fileNotDirectory() throws IOException {
TypeSpec type = TypeSpec.classBuilder("Test").build();
JavaFile javaFile = JavaFile.builder("example", type).build();
File file = new File(tmp.newFolder("foo"), "bar");
file.createNewFile();
try {
javaFile.writeTo(file);
fail();
} catch (IllegalArgumentException e) {
assertThat(e.getMessage()).isEqualTo(
"path " + file.getPath() + " exists but is not a directory.");
}
}
@Test public void pathDefaultPackage() throws IOException {
TypeSpec type = TypeSpec.classBuilder("Test").build();
JavaFile.builder("", type).build().writeTo(fsRoot);
Path testPath = fsRoot.resolve("Test.java");
assertThat(Files.exists(testPath)).isTrue();
}
@Test public void fileDefaultPackage() throws IOException {
TypeSpec type = TypeSpec.classBuilder("Test").build();
JavaFile.builder("", type).build().writeTo(tmp.getRoot());
File testFile = new File(tmp.getRoot(), "Test.java");
assertThat(testFile.exists()).isTrue();
}
@Test public void filerDefaultPackage() throws IOException {
TypeSpec type = TypeSpec.classBuilder("Test").build();
JavaFile.builder("", type).build().writeTo(filer);
Path testPath = fsRoot.resolve("Test.java");
assertThat(Files.exists(testPath)).isTrue();
}
@Test public void pathNestedClasses() throws IOException {
TypeSpec type = TypeSpec.classBuilder("Test").build();
JavaFile.builder("foo", type).build().writeTo(fsRoot);
JavaFile.builder("foo.bar", type).build().writeTo(fsRoot);
JavaFile.builder("foo.bar.baz", type).build().writeTo(fsRoot);
Path fooPath = fsRoot.resolve(fs.getPath("foo", "Test.java"));
Path barPath = fsRoot.resolve(fs.getPath("foo", "bar", "Test.java"));
Path bazPath = fsRoot.resolve(fs.getPath("foo", "bar", "baz", "Test.java"));
assertThat(Files.exists(fooPath)).isTrue();
assertThat(Files.exists(barPath)).isTrue();
assertThat(Files.exists(bazPath)).isTrue();
}
@Test public void fileNestedClasses() throws IOException {
TypeSpec type = TypeSpec.classBuilder("Test").build();
JavaFile.builder("foo", type).build().writeTo(tmp.getRoot());
JavaFile.builder("foo.bar", type).build().writeTo(tmp.getRoot());
JavaFile.builder("foo.bar.baz", type).build().writeTo(tmp.getRoot());
File fooDir = new File(tmp.getRoot(), "foo");
File fooFile = new File(fooDir, "Test.java");
File barDir = new File(fooDir, "bar");
File barFile = new File(barDir, "Test.java");
File bazDir = new File(barDir, "baz");
File bazFile = new File(bazDir, "Test.java");
assertThat(fooFile.exists()).isTrue();
assertThat(barFile.exists()).isTrue();
assertThat(bazFile.exists()).isTrue();
}
@Test public void filerNestedClasses() throws IOException {
TypeSpec type = TypeSpec.classBuilder("Test").build();
JavaFile.builder("foo", type).build().writeTo(filer);
JavaFile.builder("foo.bar", type).build().writeTo(filer);
JavaFile.builder("foo.bar.baz", type).build().writeTo(filer);
Path fooPath = fsRoot.resolve(fs.getPath("foo", "Test.java"));
Path barPath = fsRoot.resolve(fs.getPath("foo", "bar", "Test.java"));
Path bazPath = fsRoot.resolve(fs.getPath("foo", "bar", "baz", "Test.java"));
assertThat(Files.exists(fooPath)).isTrue();
assertThat(Files.exists(barPath)).isTrue();
assertThat(Files.exists(bazPath)).isTrue();
}
@Test public void filerPassesOriginatingElements() throws IOException {
Element element1_1 = Mockito.mock(Element.class);
TypeSpec test1 = TypeSpec.classBuilder("Test1")
.addOriginatingElement(element1_1)
.build();
Element element2_1 = Mockito.mock(Element.class);
Element element2_2 = Mockito.mock(Element.class);
TypeSpec test2 = TypeSpec.classBuilder("Test2")
.addOriginatingElement(element2_1)
.addOriginatingElement(element2_2)
.build();
JavaFile.builder("example", test1).build().writeTo(filer);
JavaFile.builder("example", test2).build().writeTo(filer);
Path testPath1 = fsRoot.resolve(fs.getPath("example", "Test1.java"));
assertThat(filer.getOriginatingElements(testPath1)).containsExactly(element1_1);
Path testPath2 = fsRoot.resolve(fs.getPath("example", "Test2.java"));
assertThat(filer.getOriginatingElements(testPath2)).containsExactly(element2_1, element2_2);
}
@Test public void filerClassesWithTabIndent() throws IOException {
TypeSpec test = TypeSpec.classBuilder("Test")
.addField(Date.class, "madeFreshDate")
.addMethod(MethodSpec.methodBuilder("main")
.addModifiers(Modifier.PUBLIC, Modifier.STATIC)
.addParameter(String[].class, "args")
.addCode("$T.out.println($S);\n", System.class, "Hello World!")
.build())
.build();
JavaFile.builder("foo", test).indent("\t").build().writeTo(filer);
Path fooPath = fsRoot.resolve(fs.getPath("foo", "Test.java"));
assertThat(Files.exists(fooPath)).isTrue();
String source = new String(Files.readAllBytes(fooPath));
assertThat(source).isEqualTo(""
+ "package foo;\n"
+ "\n"
+ "import java.lang.String;\n"
+ "import java.lang.System;\n"
+ "import java.util.Date;\n"
+ "\n"
+ "class Test {\n"
+ "\tDate madeFreshDate;\n"
+ "\n"
+ "\tpublic static void main(String[] args) {\n"
+ "\t\tSystem.out.println(\"Hello World!\");\n"
+ "\t}\n"
+ "}\n");
}
/**
* This test confirms that JavaPoet ignores the host charset and always uses UTF-8. The host
* charset is customized with {@code -Dfile.encoding=ISO-8859-1}.
*/
@Test public void fileIsUtf8() throws IOException {
JavaFile javaFile = JavaFile.builder("foo", TypeSpec.classBuilder("Taco").build())
.addFileComment("Pi\u00f1ata\u00a1")
.build();
javaFile.writeTo(fsRoot);
Path fooPath = fsRoot.resolve(fs.getPath("foo", "Taco.java"));
assertThat(new String(Files.readAllBytes(fooPath), UTF_8)).isEqualTo(""
+ "// Pi\u00f1ata\u00a1\n"
+ "package foo;\n"
+ "\n"
+ "class Taco {\n"
+ "}\n");
}
}
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