MiniDFSCluster cluster = new MiniDFSCluster(conf, 2, true, null);
FileSystem fs = cluster.getFileSystem();
assertTrue("Not a HDFS: "+fs.getUri(),
fs instanceof DistributedFileSystem);
DistributedFileSystem fileSys = (DistributedFileSystem)fs;
FsShell shell = new FsShell();
shell.setConf(conf);
try {
// First create a new directory with mkdirs
Path myPath = new Path("/test/mkdirs");
assertTrue(fileSys.mkdirs(myPath));
assertTrue(fileSys.exists(myPath));
assertTrue(fileSys.mkdirs(myPath));
// Second, create a file in that directory.
Path myFile = new Path("/test/mkdirs/myFile");
writeFile(fileSys, myFile);
assertTrue(fileSys.exists(myFile));
// Verify that we can read the file
{
String[] args = new String[2];
args[0] = "-cat";
args[1] = "/test/mkdirs/myFile";
int val = -1;
try {
val = shell.run(args);
} catch (Exception e) {
System.err.println("Exception raised from DFSShell.run: " +
StringUtils.stringifyException(e));
}
assertTrue(val == 0);
}
// Verify that we can get with and without crc
{
File testFile = new File(TEST_ROOT_DIR, "myFile");
File checksumFile = new File(fileSys.getChecksumFile(
new Path(testFile.getAbsolutePath())).toString());
testFile.delete();
checksumFile.delete();
String[] args = new String[3];
args[0] = "-get";
args[1] = "/test/mkdirs";
args[2] = TEST_ROOT_DIR;
int val = -1;
try {
val = shell.run(args);
} catch (Exception e) {
System.err.println("Exception raised from DFSShell.run " +
e.getLocalizedMessage());
}
assertTrue(val == 0);
assertTrue("Copying failed.", testFile.exists());
assertTrue("Checksum file " + checksumFile+" is copied.", !checksumFile.exists());
testFile.delete();
}
{
File testFile = new File(TEST_ROOT_DIR, "myFile");
File checksumFile = new File(fileSys.getChecksumFile(
new Path(testFile.getAbsolutePath())).toString());
testFile.delete();
checksumFile.delete();
String[] args = new String[4];
args[0] = "-get";
args[1] = "-crc";
args[2] = "/test/mkdirs";
args[3] = TEST_ROOT_DIR;
int val = -1;
try {
val = shell.run(args);
} catch (Exception e) {
System.err.println("Exception raised from DFSShell.run " +
e.getLocalizedMessage());
}
assertTrue(val == 0);
assertTrue("Copying data file failed.", testFile.exists());
assertTrue("Checksum file " + checksumFile+" not copied.", checksumFile.exists());
testFile.delete();
checksumFile.delete();
}
// Verify that we get an error while trying to read an nonexistent file
{
String[] args = new String[2];
args[0] = "-cat";
args[1] = "/test/mkdirs/myFile1";
int val = -1;
try {
val = shell.run(args);
} catch (Exception e) {
System.err.println("Exception raised from DFSShell.run " +
e.getLocalizedMessage());
}
assertTrue(val != 0);
}
// Verify that we get an error while trying to delete an nonexistent file
{
String[] args = new String[2];
args[0] = "-rm";
args[1] = "/test/mkdirs/myFile1";
int val = -1;
try {
val = shell.run(args);
} catch (Exception e) {
System.err.println("Exception raised from DFSShell.run " +
e.getLocalizedMessage());
}
assertTrue(val != 0);
}
// Verify that we succeed in removing the file we created
{
String[] args = new String[2];
args[0] = "-rm";
args[1] = "/test/mkdirs/myFile";
int val = -1;
try {
val = shell.run(args);
} catch (Exception e) {
System.err.println("Exception raised from DFSShell.run " +
e.getLocalizedMessage());
}
assertTrue(val == 0);
}
// Verify that cp from a directory to a subdirectory fails
{
String[] args = new String[2];
args[0] = "-mkdir";
args[1] = "/test/dir1";
int val = -1;
try {
val = shell.run(args);
} catch (Exception e) {
System.err.println("Exception raised from DFSShell.run " +
e.getLocalizedMessage());
}
assertTrue(val == 0);
// this should fail
String[] args1 = new String[3];
args1[0] = "-cp";
args1[1] = "/test/dir1";
args1[2] = "/test/dir1/dir2";
val = 0;
try {
val = shell.run(args1);
} catch (Exception e) {
System.err.println("Exception raised from DFSShell.run " +
e.getLocalizedMessage());
}
assertTrue(val == -1);
// this should succeed
args1[0] = "-cp";
args1[1] = "/test/dir1";
args1[2] = "/test/dir1foo";
val = -1;
try {
val = shell.run(args1);
} catch (Exception e) {
System.err.println("Exception raised from DFSShell.run " +
e.getLocalizedMessage());
}
assertTrue(val == 0);