test to decode files created with lzma(1)

net/contrapunctus/lzma/LzmaCompatTest.java

@@ -1,4 +1,4 @@
-// LzmaCompat.java -- test program for compatibility with lzma(1)
+// LzmaCompatTest.java -- test program for compatibility with lzma(1)
 // Copyright (c)2009 Christopher League <league@contrapunctus.net>
 
 // This is free software, but it comes with ABSOLUTELY NO WARRANTY.
@@ -7,9 +7,69 @@
 package net.contrapunctus.lzma;
 
 import java.io.*;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.zip.CRC32;
+import java.util.zip.CheckedInputStream;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized.Parameters;
+import org.junit.runners.Parameterized;
+import static org.junit.Assert.assertTrue;
 
-public class LzmaCompat
+@RunWith(Parameterized.class)
+public class LzmaCompatTest
 {
+    @Parameters public static Collection<Object[]> parameters()
+        throws FileNotFoundException
+    {
+        File dir = new File("tests/lzma-cmd");
+        File[] fs = dir.listFiles();
+        if(null == fs)
+            {
+                throw new FileNotFoundException
+                    ("directory tests/lzma-cmd not found");
+            }
+        Collection<Object[]> args = new ArrayList<Object[]>();
+        for(File f : fs)
+            {
+                args.add(new Object[] { f });
+            }
+        return args;
+    }
+
+    File file;
+
+    public LzmaCompatTest(File file)
+    {
+        this.file = file;
+    }
+
+    public String toString()
+    {
+        return file.toString();
+    }
+
+    @Test public void decode()
+        throws IOException
+    {
+        System.out.printf("%s:", this);
+        FileInputStream fis = new FileInputStream(file);
+        LzmaInputStream lis = new LzmaInputStream(fis);
+        CRC32 sum = new CRC32();
+        CheckedInputStream cis = new CheckedInputStream(lis, sum);
+        byte[] buf = new byte[4096];
+        int k, n = 0;
+        while( -1 != (k = cis.read(buf)))
+            {
+                n += k;
+            }
+        cis.close();
+        long val = sum.getValue();
+        System.out.printf("%d bytes, sum %x\n", n, val);
+        assertTrue(file.getName().startsWith(Long.toHexString(val)));
+    }
+
     public static void writeFile( String name ) throws IOException
     {
         System.out.printf("writing %s with%s header\n",