copy 'springy' branch to heritrix3

commons/src/test/java/org/archive/io/RepositionableInputStreamTest.java

@@ -0,0 +1,76 @@
+/* RepositionableInputStreamTest.java
+ *
+ * $Id$
+ *
+ * Created Dec 20, 2005
+ *
+ * Copyright (C) 2005 Internet Archive.
+ *
+ * This file is part of the Heritrix web crawler (crawler.archive.org).
+ *
+ * Heritrix is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or
+ * any later version.
+ *
+ * Heritrix is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser Public License
+ * along with Heritrix; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+package org.archive.io;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.PrintWriter;
+
+import org.archive.util.TmpDirTestCase;
+
+public class RepositionableInputStreamTest extends TmpDirTestCase {
+    private File testFile;
+    private static final String LINE = "0123456789abcdefghijklmnopqrstuv";
+    protected void setUp() throws Exception {
+        super.setUp();
+        this.testFile = new File(getTmpDir(), this.getClass().getName());
+        PrintWriter pw = new PrintWriter(new FileOutputStream(testFile));
+        for (int i = 0; i < 100; i++) {
+            pw.print(LINE);
+        }
+        pw.close();
+    }
+    protected void tearDown() throws Exception {
+        super.tearDown();
+    }
+    public void testname() throws Exception {
+        // Make buffer awkward size so we run into buffers spanning issues.
+        RepositionableInputStream ris =
+            new RepositionableInputStream(new FileInputStream(this.testFile),
+                57);
+        int c = ris.read();
+        assertEquals(1, ris.position());
+        ris.read();
+        ris.position(0);
+        assertEquals(0, ris.position());
+        int c1 = ris.read();
+        assertEquals(c, c1);
+        ris.position(0);
+        byte [] bytes = new byte[LINE.length()];
+        long offset = 0;
+        for (int i = 0; i < 10; i++) {
+            ris.read(bytes, 0, LINE.length());
+            assertEquals(LINE, new String(bytes));
+            offset += LINE.length();
+            assertEquals(offset, ris.position());
+        }
+        long p = ris.position();
+        ris.position(p - LINE.length());
+        assertEquals(p - LINE.length(), ris.position());
+        c = ris.read();
+        assertEquals(c, c1);
+    }
+}