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maven added dependency and IO work

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This commit is contained in:
eugenp
2014-01-06 21:35:23 +02:00
parent 52a6046e45
commit 458db43570
3 changed files with 165 additions and 105 deletions
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55
core-java/src/test/java/org/baeldung/java/CoreJavaIoUnitTest.java
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@@ -1,8 +1,17 @@
package org.baeldung.java;
import static org.apache.commons.lang3.RandomStringUtils.randomAlphabetic;
import static org.hamcrest.Matchers.equalTo;
import static org.junit.Assert.assertThat;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.Reader;
import java.io.StringReader;
import java.nio.charset.StandardCharsets;
import java.util.Scanner;
import org.apache.commons.io.FileUtils;
@@ -11,12 +20,15 @@ import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.common.base.Charsets;
import com.google.common.io.ByteSource;
import com.google.common.io.CharStreams;
import com.google.common.io.Files;
import com.google.common.io.InputSupplier;
public class CoreJavaIoUnitTest {
protected final Logger logger = LoggerFactory.getLogger(getClass());
// tests -
// tests - iterate lines in a file
@Test
public final void givenUsingGuava_whenIteratingAFile_thenCorrect() throws IOException {
@@ -70,7 +82,45 @@ public class CoreJavaIoUnitTest {
logMemory();
}
//
// tests - InputStream to String
@Test
public final void givenUsingJava7_whenConvertingAnInputStreamToAString_thenCorrect() throws IOException {
final String originalString = randomAlphabetic(8);
final InputStream inputStream = new ByteArrayInputStream(originalString.getBytes()); // exampleString.getBytes(StandardCharsets.UTF_8);
// When
String text = null;
try (Scanner scanner = new Scanner(inputStream, StandardCharsets.UTF_8.name())) {
text = scanner.useDelimiter("\\A").next();
}
assertThat(text, equalTo(originalString));
}
@Test
public final void givenUsingGuavaNoEncoding_whenConvertingAnInputStreamToAString_thenCorrect() throws IOException {
final String originalString = randomAlphabetic(8);
final InputSupplier<StringReader> readerSupplier = CharStreams.newReaderSupplier(originalString);
// When
final String text = CharStreams.toString(readerSupplier);
assertThat(text, equalTo(originalString));
}
@Test
public final void givenUsingGuavaWithEncoding_whenConvertingAnInputStreamToAString_thenCorrect() throws IOException {
final String originalString = randomAlphabetic(8);
final InputSupplier<Reader> readerSupplier = ByteSource.wrap(originalString.getBytes()).asCharSource(Charsets.UTF_8);
// When
final String text = CharStreams.toString(readerSupplier);
assertThat(text, equalTo(originalString));
}
// utils
private final void logMemory() {
logger.info("Max Memory: {} Mb", Runtime.getRuntime().maxMemory() / 1048576);
@@ -79,4 +129,3 @@ public class CoreJavaIoUnitTest {
}
}
//