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/*
* Copyright (C) 2008 The Guava Authors
*
* 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.common.io;
import static com.google.common.base.CharMatcher.whitespace;
import static com.google.common.truth.Truth.assertThat;
import static org.junit.Assert.assertThrows;
import com.google.common.base.Charsets;
import com.google.common.collect.ImmutableList;
import com.google.common.testing.NullPointerTester;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.ArrayList;
import java.util.List;
import junit.framework.TestSuite;
/**
* Unit test for {@link Resources}.
*
* @author Chris Nokleberg
*/
public class ResourcesTest extends IoTestCase {
@AndroidIncompatible // wouldn't run anyway, but strip the source entirely because of b/230620681
public static TestSuite suite() {
TestSuite suite = new TestSuite();
suite.addTest(
ByteSourceTester.tests(
"Resources.asByteSource[URL]", SourceSinkFactories.urlByteSourceFactory(), true));
suite.addTest(
CharSourceTester.tests(
"Resources.asCharSource[URL, Charset]",
SourceSinkFactories.urlCharSourceFactory(),
false));
suite.addTestSuite(ResourcesTest.class);
return suite;
}
public void testToString() throws IOException {
URL resource = getClass().getResource("testdata/i18n.txt");
assertEquals(I18N, Resources.toString(resource, Charsets.UTF_8));
assertThat(Resources.toString(resource, Charsets.US_ASCII)).isNotEqualTo(I18N);
}
public void testToByteArray() throws IOException {
URL resource = getClass().getResource("testdata/i18n.txt");
assertThat(Resources.toByteArray(resource)).isEqualTo(I18N.getBytes(Charsets.UTF_8));
}
public void testReadLines() throws IOException {
// TODO(chrisn): Check in a better resource
URL resource = getClass().getResource("testdata/i18n.txt");
assertEquals(ImmutableList.of(I18N), Resources.readLines(resource, Charsets.UTF_8));
}
public void testReadLines_withLineProcessor() throws IOException {
URL resource = getClass().getResource("testdata/alice_in_wonderland.txt");
LineProcessor<List<String>> collectAndLowercaseAndTrim =
new LineProcessor<List<String>>() {
List<String> collector = new ArrayList<>();
@Override
public boolean processLine(String line) {
collector.add(whitespace().trimFrom(line));
return true;
}
@Override
public List<String> getResult() {
return collector;
}
};
List<String> result =
Resources.readLines(resource, Charsets.US_ASCII, collectAndLowercaseAndTrim);
assertEquals(3600, result.size());
assertEquals("ALICE'S ADVENTURES IN WONDERLAND", result.get(0));
assertEquals("THE END", result.get(result.size() - 1));
}
public void testCopyToOutputStream() throws IOException {
ByteArrayOutputStream out = new ByteArrayOutputStream();
URL resource = getClass().getResource("testdata/i18n.txt");
Resources.copy(resource, out);
assertEquals(I18N, out.toString("UTF-8"));
}
public void testGetResource_notFound() {
IllegalArgumentException e =
assertThrows(
IllegalArgumentException.class, () -> Resources.getResource("no such resource"));
assertThat(e).hasMessageThat().isEqualTo("resource no such resource not found.");
}
public void testGetResource() {
assertNotNull(Resources.getResource("com/google/common/io/testdata/i18n.txt"));
}
public void testGetResource_relativePath_notFound() {
IllegalArgumentException e =
assertThrows(
IllegalArgumentException.class,
() -> Resources.getResource(getClass(), "com/google/common/io/testdata/i18n.txt"));
assertThat(e)
.hasMessageThat()
.isEqualTo(
"resource com/google/common/io/testdata/i18n.txt"
+ " relative to com.google.common.io.ResourcesTest not found.");
}
public void testGetResource_relativePath() {
assertNotNull(Resources.getResource(getClass(), "testdata/i18n.txt"));
}
public void testGetResource_contextClassLoader() throws IOException {
// Check that we can find a resource if it is visible to the context class
// loader, even if it is not visible to the loader of the Resources class.
File tempFile = createTempFile();
PrintWriter writer = new PrintWriter(tempFile, "UTF-8");
writer.println("rud a chur ar an méar fhada");
writer.close();
// First check that we can't find it without setting the context loader.
// This is a sanity check that the test doesn't spuriously pass because
// the resource is visible to the system class loader.
assertThrows(IllegalArgumentException.class, () -> Resources.getResource(tempFile.getName()));
// Now set the context loader to one that should find the resource.
URL baseUrl = tempFile.getParentFile().toURI().toURL();
URLClassLoader loader = new URLClassLoader(new URL[] {baseUrl});
ClassLoader oldContextLoader = Thread.currentThread().getContextClassLoader();
try {
Thread.currentThread().setContextClassLoader(loader);
URL url = Resources.getResource(tempFile.getName());
String text = Resources.toString(url, Charsets.UTF_8);
assertEquals("rud a chur ar an méar fhada" + System.lineSeparator(), text);
} finally {
Thread.currentThread().setContextClassLoader(oldContextLoader);
}
}
public void testGetResource_contextClassLoaderNull() {
ClassLoader oldContextLoader = Thread.currentThread().getContextClassLoader();
try {
Thread.currentThread().setContextClassLoader(null);
assertNotNull(Resources.getResource("com/google/common/io/testdata/i18n.txt"));
assertThrows(IllegalArgumentException.class, () -> Resources.getResource("no such resource"));
} finally {
Thread.currentThread().setContextClassLoader(oldContextLoader);
}
}
@AndroidIncompatible // .class files aren't available
public void testNulls() {
new NullPointerTester()
.setDefault(URL.class, classfile(ResourcesTest.class))
.testAllPublicStaticMethods(Resources.class);
}
private static URL classfile(Class<?> c) {
return c.getResource(c.getSimpleName() + ".class");
}
}
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