Check dimensions and content of bitmaps in EmbedderTests.

testing/embedder_test.cpp

Index: testing/embedder_test.cpp
diff --git a/testing/embedder_test.cpp b/testing/embedder_test.cpp
index c23b5c8018d78c4bdf1a88b0d0726c4b0ca62b3c..5fd540893c3501658999491e30c5d640543e5be0 100644
--- a/testing/embedder_test.cpp
+++ b/testing/embedder_test.cpp
@@ -17,6 +17,7 @@
 #include "public/fpdfview.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/test_support.h"
+#include "testing/utils/md5.h"
 #include "testing/utils/path_service.h"
 
 #ifdef PDF_ENABLE_V8
@@ -323,6 +324,20 @@ FPDF_PAGE EmbedderTest::GetPageTrampoline(FPDF_FORMFILLINFO* info,
                                                               page_index);
 }
 
+// static
+void EmbedderTest::CompareBitmap(FPDF_BITMAP bitmap,
+                                 int expected_width,
+                                 int expected_height,
+                                 const char* expected_md5sum) {
+  ASSERT_EQ(expected_width, FPDFBitmap_GetWidth(bitmap));
+  ASSERT_EQ(expected_height, FPDFBitmap_GetHeight(bitmap));
+  const int expected_stride = expected_width * 4;
+  ASSERT_EQ(expected_stride, FPDFBitmap_GetStride(bitmap));
+  EXPECT_EQ(expected_md5sum,
+            pdfium::MD5String(FPDFBitmap_GetBuffer(bitmap),
+                              expected_stride * expected_height));
+}
+
 // Can't use gtest-provided main since we need to stash the path to the
 // executable in order to find the external V8 binary data files.
 int main(int argc, char** argv) {