/**
* Copyright 2011-2017 Asakusa Framework Team.
*
* 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.asakusafw.windgate.stream;
import static org.hamcrest.Matchers.*;
import static org.junit.Assert.*;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import org.junit.Assume;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TemporaryFolder;
/**
* Test for {@link StreamSourceDriver}.
*/
public class StreamSourceDriverTest {
/**
* Temporary folder.
*/
@Rule
public TemporaryFolder folder = new TemporaryFolder();
/**
* Simple testing.
* @throws Exception if failed
*/
@Test
public void simple() throws Exception {
File file = folder.newFile("testing");
put(file, "Hello, world!");
StringBuilder buf = new StringBuilder();
try (StreamSourceDriver<StringBuilder> driver = new StreamSourceDriver<>(
"streaming",
"testing",
wrap(new FileInputStreamProvider(file)),
new StringBuilderSupport(),
buf)) {
driver.prepare();
assertThat(driver.next(), is(true));
assertThat(driver.get().toString(), is("Hello, world!"));
assertThat(driver.next(), is(false));
}
}
/**
* empty file.
* @throws Exception if failed
*/
@Test
public void empty() throws Exception {
File file = folder.newFile("testing");
StringBuilder buf = new StringBuilder();
try (StreamSourceDriver<StringBuilder> driver = new StreamSourceDriver<>(
"streaming",
"testing",
wrap(new FileInputStreamProvider(file)),
new StringBuilderSupport(),
buf)) {
driver.prepare();
assertThat(driver.next(), is(false));
}
}
/**
* read multiple lines.
* @throws Exception if failed
*/
@Test
public void multiple() throws Exception {
File file = folder.newFile("testing");
put(file, "Hello1, world!", "Hello2, world!", "Hello3, world!");
StringBuilder buf = new StringBuilder();
try (StreamSourceDriver<StringBuilder> driver = new StreamSourceDriver<>(
"streaming",
"testing",
wrap(new FileInputStreamProvider(file)),
new StringBuilderSupport(),
buf)) {
driver.prepare();
assertThat(driver.next(), is(true));
assertThat(driver.get().toString(), is("Hello1, world!"));
assertThat(driver.next(), is(true));
assertThat(driver.get().toString(), is("Hello2, world!"));
assertThat(driver.next(), is(true));
assertThat(driver.get().toString(), is("Hello3, world!"));
assertThat(driver.next(), is(false));
}
}
/**
* Failed to open.
* @throws Exception if failed
*/
@Test(expected = IOException.class)
public void invalid_open_fail() throws Exception {
File file = folder.newFile("testing");
Assume.assumeTrue(file.delete());
StringBuilder buf = new StringBuilder();
try (StreamSourceDriver<StringBuilder> driver = new StreamSourceDriver<>(
"streaming",
"testing",
wrap(new FileInputStreamProvider(file)),
new StringBuilderSupport(),
buf)) {
driver.prepare();
driver.next();
fail();
}
}
/**
* suppresses error on close.
* @throws Exception if failed
*/
@Test
public void suppress_close_failed() throws Exception {
File file = folder.newFile("testing");
put(file, "Hello, world!");
StringBuilder buf = new StringBuilder();
try (StreamSourceDriver<StringBuilder> driver = new StreamSourceDriver<>(
"streaming",
"testing",
wrap(new StreamProvider<InputStream>() {
@Override
public String getDescription() {
return "example";
}
@Override
public InputStream open() throws IOException {
return new InputStream() {
@Override
public int read() throws IOException {
return -1;
}
@Override
public void close() throws IOException {
throw new IOException();
}
};
}
}),
new StringBuilderSupport(),
buf)) {
driver.prepare();
assertThat(driver.next(), is(false));
}
}
private void put(File file, String... lines) throws IOException {
try (PrintWriter writer = new PrintWriter(file.getAbsolutePath(), "UTF-8")) {
for (String line : lines) {
writer.println(line);
}
}
}
private InputStreamProvider wrap(StreamProvider<InputStream> provider) {
return new MockInputStreamProvider(provider);
}
private static class FileInputStreamProvider implements StreamProvider<InputStream> {
private final File file;
FileInputStreamProvider(File file) {
this.file = file;
}
@Override
public String getDescription() {
return file.getName();
}
@Override
public InputStream open() throws IOException {
return new FileInputStream(file);
}
}
}