fix problem with lzw decoder when run without early code change, now that we actually have test input

git-svn-id: svn+q:///qpdf/trunk@646 71b93d88-0707-0410-a8cf-f5a4172ac649

3 files changed, 26 insertions, 4 deletions

diff --git a/libtests/qtest/lzw.test b/libtests/qtest/lzw.test
index abb412d4..649cd330 100644
--- a/libtests/qtest/lzw.test
+++ b/libtests/qtest/lzw.test
@@ -9,9 +9,31 @@ require TestDriver;
 
 my $td = new TestDriver('lzw');
 
-$td->runtest("decode",
-	     {$td->COMMAND => "lzw < lzw1.in"},
-	     {$td->FILE => "lzw1.out",
+cleanup();
+
+$td->runtest("decode: early code change",
+	     {$td->COMMAND => "lzw < lzw1.in > tmp"},
+	     {$td->STRING => "",
+	      $td->EXIT_STATUS => 0});
+
+$td->runtest("check output",
+	     {$td->FILE => "tmp"},
+	     {$td->FILE => "lzw1.out"});
+
+$td->runtest("decode: no early code change",
+	     {$td->COMMAND => "lzw --no-early-code-change < lzw2.in > tmp"},
+	     {$td->STRING => "",
 	      $td->EXIT_STATUS => 0});
 
-$td->report(1);
+$td->runtest("check output",
+	     {$td->FILE => "tmp"},
+	     {$td->FILE => "lzw2.out"});
+
+cleanup();
+
+$td->report(4);
+
+sub cleanup
+{
+    unlink "tmp";
+}
diff --git a/libtests/qtest/lzw/lzw2.in b/libtests/qtest/lzw/lzw2.in
new file mode 100644
index 00000000..5109c45a
--- /dev/null
+++ b/libtests/qtest/lzw/lzw2.in
diff --git a/libtests/qtest/lzw/lzw2.out b/libtests/qtest/lzw/lzw2.out
new file mode 100644
index 00000000..ab105031
--- /dev/null
+++ b/libtests/qtest/lzw/lzw2.out