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More NPOIFSStream unit tests, and stub out a few future ones too 

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1053008 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Nick Burch 2010-12-27 06:55:51 +00:00
parent 1bffc624a7
commit e480b455cf
1 changed files with 138 additions and 7 deletions
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145
src/testcases/org/apache/poi/poifs/filesystem/TestNPOIFSStream.java
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@ -23,6 +23,7 @@ import java.util.Iterator;
import junit.framework.TestCase;
import org.apache.poi.POIDataSamples;
import org.apache.poi.poifs.common.POIFSConstants;
/**
* Tests {@link NPOIFSStream}
@ -247,13 +248,44 @@ public final class TestNPOIFSStream extends TestCase {
assertEquals(true, i.hasNext());
}
/**
* Tests that we can load some streams that are
* stored in the mini stream.
*/
public void testReadMiniStreams() throws Exception {
NPOIFSFileSystem fs = new NPOIFSFileSystem(_inst.openResourceAsStream("BlockSize512.zvi"));
// TODO
}
/**
* Writing the same amount of data as before
*/
public void testReplaceStream() throws Exception {
NPOIFSFileSystem fs = new NPOIFSFileSystem(_inst.getFile("BlockSize512.zvi"));
NPOIFSFileSystem fs = new NPOIFSFileSystem(_inst.openResourceAsStream("BlockSize512.zvi"));
// TODO
byte[] data = new byte[512];
for(int i=0; i<data.length; i++) {
data[i] = (byte)(i%256);
}
// 98 is actually the last block in a two block stream...
NPOIFSStream stream = new NPOIFSStream(fs, 98);
stream.updateContents(data);
// Check the reading of blocks
Iterator<ByteBuffer> it = stream.getBlockIterator();
assertEquals(true, it.hasNext());
ByteBuffer b = it.next();
assertEquals(false, it.hasNext());
// Now check the contents
data = new byte[512];
b.get(data);
for(int i=0; i<data.length; i++) {
byte exp = (byte)(i%256);
assertEquals(exp, data[i]);
}
}
/**
@ -261,18 +293,82 @@ public final class TestNPOIFSStream extends TestCase {
* to be freed
*/
public void testReplaceStreamWithLess() throws Exception {
NPOIFSFileSystem fs = new NPOIFSFileSystem(_inst.getFile("BlockSize512.zvi"));
NPOIFSFileSystem fs = new NPOIFSFileSystem(_inst.openResourceAsStream("BlockSize512.zvi"));
// TODO
byte[] data = new byte[512];
for(int i=0; i<data.length; i++) {
data[i] = (byte)(i%256);
}
// 97 -> 98 -> end
assertEquals(98, fs.getNextBlock(97));
assertEquals(POIFSConstants.END_OF_CHAIN, fs.getNextBlock(98));
// Create a 2 block stream, will become a 1 block one
NPOIFSStream stream = new NPOIFSStream(fs, 97);
stream.updateContents(data);
// 97 should now be the end, and 98 free
assertEquals(POIFSConstants.END_OF_CHAIN, fs.getNextBlock(97));
assertEquals(POIFSConstants.UNUSED_BLOCK, fs.getNextBlock(98));
// Check the reading of blocks
Iterator<ByteBuffer> it = stream.getBlockIterator();
assertEquals(true, it.hasNext());
ByteBuffer b = it.next();
assertEquals(false, it.hasNext());
// Now check the contents
data = new byte[512];
b.get(data);
for(int i=0; i<data.length; i++) {
byte exp = (byte)(i%256);
assertEquals(exp, data[i]);
}
}
/**
* Writes more data than before, new blocks will be needed
*/
public void testReplaceStreamWithMore() throws Exception {
NPOIFSFileSystem fs = new NPOIFSFileSystem(_inst.getFile("BlockSize512.zvi"));
NPOIFSFileSystem fs = new NPOIFSFileSystem(_inst.openResourceAsStream("BlockSize512.zvi"));
// TODO
byte[] data = new byte[512*3];
for(int i=0; i<data.length; i++) {
data[i] = (byte)(i%256);
}
// 97 -> 98 -> end
assertEquals(98, fs.getNextBlock(97));
assertEquals(POIFSConstants.END_OF_CHAIN, fs.getNextBlock(98));
// 100 is our first free one
assertEquals(POIFSConstants.FAT_SECTOR_BLOCK, fs.getNextBlock(99));
assertEquals(POIFSConstants.UNUSED_BLOCK, fs.getNextBlock(100));
// Create a 2 block stream, will become a 3 block one
NPOIFSStream stream = new NPOIFSStream(fs, 97);
stream.updateContents(data);
// 97 -> 98 -> 100 -> end
assertEquals(98, fs.getNextBlock(97));
assertEquals(100, fs.getNextBlock(98));
assertEquals(POIFSConstants.END_OF_CHAIN, fs.getNextBlock(100));
// Check the reading of blocks
Iterator<ByteBuffer> it = stream.getBlockIterator();
int count = 0;
while(it.hasNext()) {
ByteBuffer b = it.next();
data = new byte[512];
b.get(data);
for(int i=0; i<data.length; i++) {
byte exp = (byte)(i%256);
assertEquals(exp, data[i]);
}
count++;
}
assertEquals(3, count);
}
/**
@ -305,10 +401,45 @@ public final class TestNPOIFSStream extends TestCase {
// TODO
}
/**
* Tests that we can write into the mini stream
*/
public void testWriteMiniStreams() throws Exception {
NPOIFSFileSystem fs = new NPOIFSFileSystem(_inst.openResourceAsStream("BlockSize512.zvi"));
// TODO
}
/**
* Craft a nasty file with a loop, and ensure we don't get stuck
*/
public void testWriteFailsOnLoop() throws Exception {
// TODO
NPOIFSFileSystem fs = new NPOIFSFileSystem(_inst.getFile("BlockSize512.zvi"));
// Hack the FAT so that it goes 0->1->2->0
fs.setNextBlock(0, 1);
fs.setNextBlock(1, 2);
fs.setNextBlock(2, 0);
// Try to write a large amount, should fail on the write
byte[] data = new byte[512*4];
NPOIFSStream stream = new NPOIFSStream(fs, 0);
try {
stream.updateContents(data);
fail("Loop should have been detected but wasn't!");
} catch(IllegalStateException e) {}
// Now reset, and try on a small bit
// Should fail during the freeing set
fs.setNextBlock(0, 1);
fs.setNextBlock(1, 2);
fs.setNextBlock(2, 0);
data = new byte[512];
stream = new NPOIFSStream(fs, 0);
try {
stream.updateContents(data);
fail("Loop should have been detected but wasn't!");
} catch(IllegalStateException e) {}
}
}