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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 com.google.common.collect.ImmutableList;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.StringWriter;
import java.util.EnumSet;
/**
* Tests for the default implementations of {@code CharSource} methods.
*
* @author Colin Decker
*/
public class CharSourceTest extends IoTestCase {
private static final String STRING = ASCII + I18N;
private static final String LINES = "foo\nbar\r\nbaz\rsomething";
private TestCharSource source;
@Override
public void setUp() {
source = new TestCharSource(STRING);
}
public void testOpenBufferedStream() throws IOException {
BufferedReader reader = source.openBufferedStream();
assertTrue(source.wasStreamOpened());
assertFalse(source.wasStreamClosed());
StringWriter writer = new StringWriter();
char[] buf = new char[64];
int read;
while ((read = reader.read(buf)) != -1) {
writer.write(buf, 0, read);
}
reader.close();
writer.close();
assertTrue(source.wasStreamClosed());
assertEquals(STRING, writer.toString());
}
public void testCopyTo_appendable() throws IOException {
StringBuilder builder = new StringBuilder();
assertEquals(STRING.length(), source.copyTo(builder));
assertTrue(source.wasStreamOpened() && source.wasStreamClosed());
assertEquals(STRING, builder.toString());
}
public void testCopyTo_charSink() throws IOException {
TestCharSink sink = new TestCharSink();
assertFalse(sink.wasStreamOpened() || sink.wasStreamClosed());
assertEquals(STRING.length(), source.copyTo(sink));
assertTrue(source.wasStreamOpened() && source.wasStreamClosed());
assertTrue(sink.wasStreamOpened() && sink.wasStreamClosed());
assertEquals(STRING, sink.getString());
}
public void testRead_toString() throws IOException {
assertEquals(STRING, source.read());
assertTrue(source.wasStreamOpened() && source.wasStreamClosed());
}
public void testReadFirstLine() throws IOException {
TestCharSource lines = new TestCharSource(LINES);
assertEquals("foo", lines.readFirstLine());
assertTrue(lines.wasStreamOpened() && lines.wasStreamClosed());
}
public void testReadLines_toList() throws IOException {
TestCharSource lines = new TestCharSource(LINES);
assertEquals(ImmutableList.of("foo", "bar", "baz", "something"), lines.readLines());
assertTrue(lines.wasStreamOpened() && lines.wasStreamClosed());
}
public void testCopyToAppendable_doesNotCloseIfWriter() throws IOException {
TestWriter writer = new TestWriter();
assertFalse(writer.closed());
source.copyTo(writer);
assertFalse(writer.closed());
}
public void testClosesOnErrors_copyingToCharSinkThatThrows() {
for (TestOption option : EnumSet.of(OPEN_THROWS, WRITE_THROWS, CLOSE_THROWS)) {
TestCharSource okSource = new TestCharSource(STRING);
try {
okSource.copyTo(new TestCharSink(option));
fail();
} catch (IOException expected) {
}
// ensure reader was closed IF it was opened (depends on implementation whether or not it's
// opened at all if sink.newWriter() throws).
assertTrue("stream not closed when copying to sink with option: " + option,
!okSource.wasStreamOpened() || okSource.wasStreamClosed());
}
}
public void testClosesOnErrors_whenReadThrows() {
TestCharSource failSource = new TestCharSource(STRING, READ_THROWS);
try {
failSource.copyTo(new TestCharSink());
fail();
} catch (IOException expected) {
}
assertTrue(failSource.wasStreamClosed());
}
public void testClosesOnErrors_copyingToWriterThatThrows() {
TestCharSource okSource = new TestCharSource(STRING);
try {
okSource.copyTo(new TestWriter(WRITE_THROWS));
fail();
} catch (IOException expected) {
}
assertTrue(okSource.wasStreamClosed());
}
}
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