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/*
* Copyright 2019 Google Inc. All Rights Reserved.
*
* 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.google.turbine.processing;
import static com.google.common.collect.Iterables.getOnlyElement;
import static com.google.common.truth.Truth.assertThat;
import static java.nio.charset.StandardCharsets.UTF_8;
import static org.junit.Assert.assertThrows;
import com.google.common.base.Supplier;
import com.google.common.io.CharStreams;
import com.google.turbine.diag.SourceFile;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.OutputStream;
import java.io.Writer;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.function.Function;
import javax.annotation.processing.FilerException;
import javax.lang.model.element.Element;
import javax.tools.FileObject;
import javax.tools.JavaFileObject;
import javax.tools.StandardLocation;
import org.checkerframework.checker.nullness.qual.Nullable;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
@RunWith(JUnit4.class)
public class TurbineFilerTest {
private final Set<String> seen = new HashSet<>();
private TurbineFiler filer;
@Before
public void setup() {
Function<String, Supplier<byte[]>> classpath =
new Function<String, Supplier<byte[]>>() {
@Override
public @Nullable Supplier<byte[]> apply(String input) {
return null;
}
};
this.filer = new TurbineFiler(seen, classpath, TurbineFilerTest.class.getClassLoader());
}
@Test
public void hello() throws IOException {
JavaFileObject sourceFile = filer.createSourceFile("com.foo.Bar", (Element[]) null);
try (OutputStream os = sourceFile.openOutputStream()) {
os.write("hello".getBytes(UTF_8));
}
assertThat(sourceFile.getLastModified()).isEqualTo(0);
JavaFileObject classFile = filer.createClassFile("com.foo.Baz", (Element[]) null);
try (OutputStream os = classFile.openOutputStream()) {
os.write("goodbye".getBytes(UTF_8));
}
assertThat(classFile.getLastModified()).isEqualTo(0);
Collection<SourceFile> roundSources = filer.finishRound();
assertThat(roundSources).hasSize(1);
assertThat(filer.generatedSources()).hasSize(1);
assertThat(filer.generatedClasses()).hasSize(1);
SourceFile source = getOnlyElement(roundSources);
assertThat(source.path()).isEqualTo("com/foo/Bar.java");
assertThat(source.source()).isEqualTo("hello");
Map.Entry<String, byte[]> clazz = getOnlyElement(filer.generatedClasses().entrySet());
assertThat(clazz.getKey()).isEqualTo("com/foo/Baz.class");
assertThat(new String(clazz.getValue(), UTF_8)).isEqualTo("goodbye");
}
@Test
public void existing() throws IOException {
seen.add("com/foo/Bar.java");
seen.add("com/foo/Baz.class");
assertThrows(
FilerException.class, () -> filer.createSourceFile("com.foo.Bar", (Element[]) null));
JavaFileObject unused = filer.createSourceFile("com.foo.Baz", (Element[]) null);
unused = filer.createClassFile("com.foo.Bar", (Element[]) null);
assertThrows(
FilerException.class, () -> filer.createClassFile("com.foo.Baz", (Element[]) null));
}
@Test
public void get() throws IOException {
for (StandardLocation location :
Arrays.asList(
StandardLocation.CLASS_OUTPUT,
StandardLocation.SOURCE_OUTPUT,
StandardLocation.ANNOTATION_PROCESSOR_PATH,
StandardLocation.CLASS_PATH)) {
assertThrows(FileNotFoundException.class, () -> filer.getResource(location, "", "NoSuch"));
}
}
@Test
public void sourceOutput() throws IOException {
JavaFileObject classFile = filer.createSourceFile("com.foo.Bar", (Element[]) null);
try (Writer writer = classFile.openWriter()) {
writer.write("hello");
}
Collection<SourceFile> unused = filer.finishRound();
FileObject output = filer.getResource(StandardLocation.SOURCE_OUTPUT, "com.foo", "Bar.java");
assertThat(new String(output.openInputStream().readAllBytes(), UTF_8)).isEqualTo("hello");
assertThat(output.getCharContent(false).toString()).isEqualTo("hello");
assertThat(CharStreams.toString(output.openReader(true))).isEqualTo("hello");
}
@Test
public void classOutput() throws IOException {
JavaFileObject classFile = filer.createClassFile("com.foo.Baz", (Element[]) null);
try (OutputStream os = classFile.openOutputStream()) {
os.write("goodbye".getBytes(UTF_8));
}
Collection<SourceFile> unused = filer.finishRound();
FileObject output = filer.getResource(StandardLocation.CLASS_OUTPUT, "com.foo", "Baz.class");
assertThat(new String(output.openInputStream().readAllBytes(), UTF_8)).isEqualTo("goodbye");
assertThat(output.getCharContent(false).toString()).isEqualTo("goodbye");
assertThat(CharStreams.toString(output.openReader(true))).isEqualTo("goodbye");
}
@Test
public void classpathResources() throws IOException {
FileObject resource =
filer.getResource(StandardLocation.ANNOTATION_PROCESSOR_PATH, "META-INF", "MANIFEST.MF");
assertThat(new String(resource.openInputStream().readAllBytes(), UTF_8))
.contains("Manifest-Version:");
assertThat(CharStreams.toString(resource.openReader(true))).contains("Manifest-Version:");
assertThat(resource.getCharContent(false).toString()).contains("Manifest-Version:");
}
}
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