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BAEL-4132: How to create a temporary directory/folder in Java?

This commit is contained in:
Rui Vilao 2020-08-26 13:18:37 +01:00
parent 0ec4fdebe1
commit a237235804
1 changed files with 75 additions and 0 deletions
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core-java-modules/core-java-io-3/src/test/java/com/baeldung/tempdirectory/TemporaryDirectoriesUnitTest.java Normal file
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package com.baeldung.tempdirectory;
import org.apache.commons.io.FileUtils;
import org.junit.Test;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.attribute.FileAttribute;
import java.nio.file.attribute.PosixFileAttributes;
import java.nio.file.attribute.PosixFilePermission;
import java.nio.file.attribute.PosixFilePermissions;
import java.util.Set;
import java.util.UUID;
import static org.assertj.core.api.Assertions.assertThat;
/**
* Tests several possibilities on how to create
* temporary directories.
*
* @author Rui Vilao (rpvilao@gmail.com)
*/
public class TemporaryDirectoriesUnitTest {
@Test
public void givenTempDirWithPrefixNoTargetSpecified_whenCreateWithPlainJava_thenInsideOSTempDirStructure() throws IOException {
final String tmpdir = Files.createTempDirectory("tmpDirPrefix").toFile().getAbsolutePath();
final String tmpDirsLocation = System.getProperty("java.io.tmpdir");
assertThat(tmpdir).startsWith(tmpDirsLocation);
}
@Test
public void givenTempDirWithPrefixNoTargetSpecified_whenCreateWithGuava_thenInsideOSTempDirStructure() throws IOException {
final String tmpdir = com.google.common.io.Files.createTempDir().getAbsolutePath();
final String tmpDirsLocation = System.getProperty("java.io.tmpdir");
assertThat(tmpdir).startsWith(tmpDirsLocation);
}
@Test
public void givenTempDirWithPrefixNoTargetSpecified_whenCreateWithApacheCommonsIo_thenInsideOSTempDirStructure() throws IOException {
final String tmpDirsLocation = System.getProperty("java.io.tmpdir");
final Path path = Paths.get(FileUtils.getTempDirectory().getAbsolutePath(), UUID.randomUUID().toString());
final String tmpdir = Files.createDirectories(path).toFile().getAbsolutePath();
assertThat(tmpdir).startsWith(tmpDirsLocation);
}
@Test
public void givenTempDirWithPrefixWithTargetSpecified_whenCreatePlainJava_thenInsideTarget() throws IOException {
final Path tmpdir = Files.createTempDirectory(Paths.get("target"), "tmpDirPrefix");
assertThat(tmpdir.toFile().getPath()).startsWith("target");
}
@Test
public void givenTempDirWithPrefixWithTargetSpecifiedWithDeleteOnExit_whenCreatePlainJava_thenInsideTarget() throws IOException {
final Path tmpdir = Files.createTempDirectory(Paths.get("target"), "tmpDirPrefix");
assertThat(tmpdir.toFile().getPath()).startsWith("target");
tmpdir.toFile().deleteOnExit();
// we can really assert this test, just as an example.
}
@Test
public void givenTempDirWithPrefixWithFileAttrs_whenCreatePlainJava_thenAttributesAreSet() throws IOException {
final FileAttribute<Set<PosixFilePermission>> attrs = PosixFilePermissions.asFileAttribute(PosixFilePermissions.fromString("r--------"));
final Path tmpdir = Files.createTempDirectory(Paths.get("target"), "tmpDirPrefix", attrs);
assertThat(tmpdir.toFile().getPath()).startsWith("target");
assertThat(tmpdir.toFile().canWrite()).isFalse();
}
}