Added a simple smoke test for Graphics3D. It attempts to exercise the entire graphics-3d pipeline...

ppapi/tests/test_graphics_3d.cc

Index: ppapi/tests/test_graphics_3d.cc
===================================================================
--- ppapi/tests/test_graphics_3d.cc	(revision 99012)
+++ ppapi/tests/test_graphics_3d.cc	(working copy)
@@ -4,9 +4,14 @@
 
 #include "ppapi/tests/test_graphics_3d.h"
 
-#include "ppapi/c/dev/ppb_graphics_3d_dev.h"
+#include <GLES2/gl2.h>
+
 #include "ppapi/c/dev/ppb_opengles_dev.h"
+#include "ppapi/c/dev/ppb_testing_dev.h"
+#include "ppapi/cpp/dev/graphics_3d_dev.h"
 #include "ppapi/cpp/module.h"
+#include "ppapi/tests/test_utils.h"
+#include "ppapi/tests/testing_instance.h"
 
 REGISTER_TEST_CASE(Graphics3D);
 
@@ -19,5 +24,54 @@
 }
 
 void TestGraphics3D::RunTest() {
+  RUN_TEST(Frame);
 }
 
+std::string TestGraphics3D::TestFrame() {
+  const int width = 16;
+  const int height = 16;
+  const int32_t attribs[] = {
+      PP_GRAPHICS3DATTRIB_WIDTH, width,
+      PP_GRAPHICS3DATTRIB_HEIGHT, height,
+      PP_GRAPHICS3DATTRIB_NONE
+  };
+  pp::Graphics3D_Dev context(*instance_, pp::Graphics3D_Dev(), attribs);
+  ASSERT_FALSE(context.is_null());
+
+  // Clear color buffer to opaque red.
+  opengl_es2_->ClearColor(context.pp_resource(), 1.0f, 0.0f, 0.0f, 1.0f);
+  opengl_es2_->Clear(context.pp_resource(), GL_COLOR_BUFFER_BIT);
+  // Check if the color buffer has opaque red.
+  const uint8_t red_color[4] = {255, 0, 0, 255};
+  std::string error = TestPixel(&context, width/2, height/2, red_color);
+  if (!error.empty())
+    return error;
+
+  int32_t rv = SwapBuffersSync(&context);
+  ASSERT_EQ(rv, PP_OK);
+  PASS();
+}
+
+int32_t TestGraphics3D::SwapBuffersSync(pp::Graphics3D_Dev* context) {
+  TestCompletionCallback callback(instance_->pp_instance(), true);
+  int32_t rv = context->SwapBuffers(callback);
+  if (rv != PP_OK_COMPLETIONPENDING)
+    return rv;
+
+  return callback.WaitForResult();
+}
+
+std::string TestGraphics3D::TestPixel(
+    pp::Graphics3D_Dev* context,
+    int x, int y, const uint8_t expected_color[4]) {
+  GLubyte pixel_color[4];
+  opengl_es2_->ReadPixels(context->pp_resource(),
+      x, y, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, pixel_color);
+
+  ASSERT_EQ(pixel_color[0], expected_color[0]);
+  ASSERT_EQ(pixel_color[1], expected_color[1]);
+  ASSERT_EQ(pixel_color[2], expected_color[2]);
+  ASSERT_EQ(pixel_color[3], expected_color[3]);
+  PASS();
+}
+