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/*
* Copyright (C) 2012 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.io.TestOption.CLOSE_THROWS;
import static com.google.common.io.TestOption.OPEN_THROWS;
import static com.google.common.io.TestOption.READ_THROWS;
import static com.google.common.io.TestOption.WRITE_THROWS;
import static org.junit.Assert.assertThrows;
import com.google.common.collect.ImmutableList;
import java.io.IOException;
import java.io.StringReader;
import java.io.Writer;
import java.util.EnumSet;
/**
* Tests for the default implementations of {@code CharSink} methods.
*
* @author Colin Decker
*/
public class CharSinkTest extends IoTestCase {
private static final String STRING = ASCII + I18N;
private TestCharSink sink;
@Override
public void setUp() {
sink = new TestCharSink();
}
public void testOpenBufferedStream() throws IOException {
Writer writer = sink.openBufferedStream();
assertTrue(sink.wasStreamOpened());
assertFalse(sink.wasStreamClosed());
writer.write(STRING);
writer.close();
assertTrue(sink.wasStreamClosed());
assertEquals(STRING, sink.getString());
}
public void testWrite_string() throws IOException {
assertEquals("", sink.getString());
sink.write(STRING);
assertTrue(sink.wasStreamOpened() && sink.wasStreamClosed());
assertEquals(STRING, sink.getString());
}
public void testWriteFrom_reader() throws IOException {
StringReader reader = new StringReader(STRING);
sink.writeFrom(reader);
assertTrue(sink.wasStreamOpened() && sink.wasStreamClosed());
assertEquals(STRING, sink.getString());
}
public void testWriteFromStream_doesNotCloseThatStream() throws IOException {
TestReader in = new TestReader();
assertFalse(in.closed());
sink.writeFrom(in);
assertFalse(in.closed());
}
public void testWriteLines_withSpecificSeparator() throws IOException {
sink.writeLines(ImmutableList.of("foo", "bar", "baz"), "\n");
assertEquals("foo\nbar\nbaz\n", sink.getString());
}
public void testWriteLines_withDefaultSeparator() throws IOException {
sink.writeLines(ImmutableList.of("foo", "bar", "baz"));
String separator = System.getProperty("line.separator");
assertEquals("foo" + separator + "bar" + separator + "baz" + separator, sink.getString());
}
public void testClosesOnErrors_copyingFromCharSourceThatThrows() {
for (TestOption option : EnumSet.of(OPEN_THROWS, READ_THROWS, CLOSE_THROWS)) {
TestCharSource failSource = new TestCharSource(STRING, option);
TestCharSink okSink = new TestCharSink();
assertThrows(IOException.class, () -> failSource.copyTo(okSink));
// ensure writer was closed IF it was opened (depends on implementation whether or not it's
// opened at all if source.newReader() throws).
assertTrue(
"stream not closed when copying from source with option: " + option,
!okSink.wasStreamOpened() || okSink.wasStreamClosed());
}
}
public void testClosesOnErrors_whenWriteThrows() {
TestCharSink failSink = new TestCharSink(WRITE_THROWS);
assertThrows(IOException.class, () -> new TestCharSource(STRING).copyTo(failSink));
assertTrue(failSink.wasStreamClosed());
}
public void testClosesOnErrors_whenWritingFromReaderThatThrows() {
TestCharSink okSink = new TestCharSink();
assertThrows(IOException.class, () -> okSink.writeFrom(new TestReader(READ_THROWS)));
assertTrue(okSink.wasStreamClosed());
}
}
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