Add embedder test for stream length beyond end of file.

fpdfsdk/src/fpdftext_embeddertest.cpp

Index: fpdfsdk/src/fpdftext_embeddertest.cpp
diff --git a/fpdfsdk/src/fpdftext_embeddertest.cpp b/fpdfsdk/src/fpdftext_embeddertest.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..e057d493c1504f2d396bc6edae59fbe8e6349bda
--- /dev/null
+++ b/fpdfsdk/src/fpdftext_embeddertest.cpp
@@ -0,0 +1,26 @@
+// Copyright 2015 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <limits>

[Lei Zhang, 2015/01/27 20:23:52]

not needed? ditto for string.

+#include <string>
+
+#include "../../testing/embedder_test.h"
+#include "../../fpdfsdk/include/fpdfview.h"
+#include "../../fpdfsdk/include/fpdftext.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+class FPDFTextEmbeddertest : public EmbedderTest {
+};
+
+// Test that the page has characters despite a bad stream length.
+TEST_F(FPDFTextEmbeddertest, StreamLengthPastEndOfFile) {
+  EXPECT_TRUE(OpenDocument("testing/resources/bug_57.pdf"));
+  FPDF_FORMHANDLE form_handle = SetFormFillEnvironment();
+  FPDF_PAGE page = LoadPage(0, form_handle);
+  EXPECT_NE(nullptr, page);
+  FPDF_TEXTPAGE textpage = FPDFText_LoadPage(page);
+  EXPECT_NE(nullptr, textpage);
+  EXPECT_EQ(13, FPDFText_CountChars(textpage));
+  ClearFormFillEnvironment(form_handle);
+}