Write some FPDFTransformEmbedderTests.

Test FPDFPage_GetMediaBox() and FPDFPage_GetCropBox().

Change-Id: Ia5ba3d95c0c859acb5c2576781cca90d3e60b40e
Reviewed-on: https://pdfium-review.googlesource.com/34570
Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>

2 files changed, 92 insertions, 0 deletions

diff --git a/BUILD.gn b/BUILD.gn
index 3422b81535..5df974aff8 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -3019,6 +3019,7 @@ test("pdfium_embeddertests") {
     "fpdfsdk/fpdf_save_embeddertest.cpp",
     "fpdfsdk/fpdf_structtree_embeddertest.cpp",
     "fpdfsdk/fpdf_text_embeddertest.cpp",
+    "fpdfsdk/fpdf_transformpage_embeddertest.cpp",
     "fpdfsdk/fpdf_view_c_api_test.c",
     "fpdfsdk/fpdf_view_c_api_test.h",
     "fpdfsdk/fpdf_view_embeddertest.cpp",
diff --git a/fpdfsdk/fpdf_transformpage_embeddertest.cpp b/fpdfsdk/fpdf_transformpage_embeddertest.cpp
new file mode 100644
index 0000000000..d064efee0b
--- /dev/null
+++ b/fpdfsdk/fpdf_transformpage_embeddertest.cpp
@@ -0,0 +1,91 @@
+// Copyright 2018 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 "public/fpdf_transformpage.h"
+#include "testing/embedder_test.h"
+
+class FPDFTransformEmbedderTest : public EmbedderTest {};
+
+TEST_F(FPDFTransformEmbedderTest, GetBoundingBoxes) {
+  ASSERT_TRUE(OpenDocument("cropped_text.pdf"));
+  ASSERT_EQ(4, FPDF_GetPageCount(document()));
+
+  {
+    FPDF_PAGE page = LoadPage(1);
+    ASSERT_TRUE(page);
+
+    float mediabox_left;
+    float mediabox_bottom;
+    float mediabox_right;
+    float mediabox_top;
+    EXPECT_TRUE(FPDFPage_GetMediaBox(page, &mediabox_left, &mediabox_bottom,
+                                     &mediabox_right, &mediabox_top));
+    EXPECT_EQ(-50, mediabox_left);
+    EXPECT_EQ(-50, mediabox_bottom);
+    EXPECT_EQ(200, mediabox_right);
+    EXPECT_EQ(200, mediabox_top);
+
+    float cropbox_left;
+    float cropbox_bottom;
+    float cropbox_right;
+    float cropbox_top;
+    EXPECT_TRUE(FPDFPage_GetCropBox(page, &cropbox_left, &cropbox_bottom,
+                                    &cropbox_right, &cropbox_top));
+    EXPECT_EQ(50, cropbox_left);
+    EXPECT_EQ(50, cropbox_bottom);
+    EXPECT_EQ(150, cropbox_right);
+    EXPECT_EQ(150, cropbox_top);
+
+    UnloadPage(page);
+  }
+
+  {
+    FPDF_PAGE page = LoadPage(3);
+    ASSERT_TRUE(page);
+
+    float mediabox_left;
+    float mediabox_bottom;
+    float mediabox_right;
+    float mediabox_top;
+    EXPECT_TRUE(FPDFPage_GetMediaBox(page, &mediabox_left, &mediabox_bottom,
+                                     &mediabox_right, &mediabox_top));
+    EXPECT_EQ(0, mediabox_left);
+    EXPECT_EQ(0, mediabox_bottom);
+    EXPECT_EQ(200, mediabox_right);
+    EXPECT_EQ(200, mediabox_top);
+
+    float cropbox_left;
+    float cropbox_bottom;
+    float cropbox_right;
+    float cropbox_top;
+    EXPECT_TRUE(FPDFPage_GetCropBox(page, &cropbox_left, &cropbox_bottom,
+                                    &cropbox_right, &cropbox_top));
+    EXPECT_EQ(150, cropbox_left);
+    EXPECT_EQ(150, cropbox_bottom);
+    EXPECT_EQ(60, cropbox_right);
+    EXPECT_EQ(60, cropbox_top);
+
+    UnloadPage(page);
+  }
+}
+
+TEST_F(FPDFTransformEmbedderTest, NoCropBox) {
+  ASSERT_TRUE(OpenDocument("hello_world.pdf"));
+  ASSERT_EQ(1, FPDF_GetPageCount(document()));
+
+  FPDF_PAGE page = LoadPage(0);
+  ASSERT_TRUE(page);
+
+  float left = -1.0f;
+  float bottom = -2.0f;
+  float right = 3.0f;
+  float top = 0.0f;
+  EXPECT_FALSE(FPDFPage_GetCropBox(page, &left, &bottom, &right, &top));
+  EXPECT_EQ(-1.0f, left);
+  EXPECT_EQ(-2.0f, bottom);
+  EXPECT_EQ(3.0f, right);
+  EXPECT_EQ(0.0f, top);
+
+  UnloadPage(page);
+}