Add test for FPDF_GetPageSizeByIndex()

Ensure that FPDF_GetPageSizeByIndex() doesn't do a full page parse.
Issue was noticed on CL https://pdfium-review.googlesource.com/32830

Change-Id: I51966e0b91e1a002d33ee51f00c0428fa1cda04d
Reviewed-on: https://pdfium-review.googlesource.com/33792
Commit-Queue: dsinclair <dsinclair@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>

1 files changed, 36 insertions, 0 deletions

diff --git a/fpdfsdk/fpdf_view_embeddertest.cpp b/fpdfsdk/fpdf_view_embeddertest.cpp
index 7cc5478808..cef5e9a0d4 100644
--- a/fpdfsdk/fpdf_view_embeddertest.cpp
+++ b/fpdfsdk/fpdf_view_embeddertest.cpp
@@ -7,6 +7,8 @@
 #include <memory>
 #include <string>
 
+#include "core/fpdfapi/parser/cpdf_document.h"
+#include "fpdfsdk/cpdfsdk_helpers.h"
 #include "fpdfsdk/fpdf_view_c_api_test.h"
 #include "public/cpp/fpdf_scopers.h"
 #include "public/fpdfview.h"
@@ -589,6 +591,40 @@ TEST_F(FPDFViewEmbeddertest, FPDF_RenderPageBitmapWithMatrix) {
   UnloadPage(page);
 }
 
+TEST_F(FPDFViewEmbeddertest, FPDF_GetPageSizeByIndex) {
+  EXPECT_TRUE(OpenDocument("rectangles.pdf"));
+  CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document());
+
+  double width = 0;
+  double height = 0;
+
+  // Page -1 doesn't exist.
+  EXPECT_FALSE(FPDF_GetPageSizeByIndex(document(), -1, &width, &height));
+
+  // Page 1 doesn't exist.
+  EXPECT_FALSE(FPDF_GetPageSizeByIndex(document(), 1, &width, &height));
+
+  // Page 0 exists.
+  EXPECT_TRUE(FPDF_GetPageSizeByIndex(document(), 0, &width, &height));
+  EXPECT_EQ(200.0, width);
+  EXPECT_EQ(300.0, height);
+
+#ifdef PDF_ENABLE_XFA
+  // TODO(tsepez): XFA must obtain this size without parsing.
+  EXPECT_EQ(1u, pDoc->GetParsedPageCountForTesting());
+#else   // PDF_ENABLE_XFA
+  EXPECT_EQ(0u, pDoc->GetParsedPageCountForTesting());
+#endif  // PDF_ENABLE_XFA
+
+  // Double-check against values from when page is actually parsed.
+  FPDF_PAGE page = LoadPage(0);
+  ASSERT_TRUE(page);
+  EXPECT_EQ(width, FPDF_GetPageWidth(page));
+  EXPECT_EQ(height, FPDF_GetPageHeight(page));
+  EXPECT_EQ(1u, pDoc->GetParsedPageCountForTesting());
+  UnloadPage(page);
+}
+
 class UnSupRecordDelegate : public EmbedderTest::Delegate {
  public:
   UnSupRecordDelegate() : type_(-1) {}