From 4d6f5ea3dcaddeed0695fe31fecca78666a5c81c Mon Sep 17 00:00:00 2001
From: Carl Hetherington <cth@carlh.net>
Date: Fri, 22 Jul 2016 09:57:49 +0100
Subject: [PATCH] Add some tests for the hashing put into the FrameInfo.

---
 test/frame_info_hash_test.cc | 57 ++++++++++++++++++++++++++++++++++++
 test/recovery_test.cc        |  1 +
 test/wscript                 |  1 +
 3 files changed, 59 insertions(+)
 create mode 100644 test/frame_info_hash_test.cc

diff --git a/test/frame_info_hash_test.cc b/test/frame_info_hash_test.cc
new file mode 100644
index 00000000..1713963b
--- /dev/null
+++ b/test/frame_info_hash_test.cc
@@ -0,0 +1,57 @@
+/*
+    Copyright (C) 2016 Carl Hetherington <cth@carlh.net>
+
+    This file is part of libdcp.
+
+    libdcp is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    libdcp is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with libdcp.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "mono_picture_asset.h"
+#include "mono_picture_asset_writer.h"
+#include "j2k.h"
+#include "openjpeg_image.h"
+#include <boost/test/unit_test.hpp>
+
+using std::string;
+using boost::shared_ptr;
+
+static void
+check (unsigned int* seed, shared_ptr<dcp::PictureAssetWriter> writer, string hash)
+{
+	shared_ptr<dcp::OpenJPEGImage> xyz (new dcp::OpenJPEGImage (dcp::Size (1998, 1080)));
+	for (int c = 0; c < 3; ++c) {
+		for (int p = 0; p < (1998 * 1080); ++p) {
+			xyz->data(c)[p] = rand_r (seed);
+		}
+	}
+
+	dcp::Data data = dcp::compress_j2k (xyz, 100000000, 24, false, false);
+
+	dcp::FrameInfo info = writer->write (data.data().get(), data.size());
+	BOOST_CHECK_EQUAL (info.hash, hash);
+}
+
+/** Test the hashing of data written to JPEG2000 MXFs with some random inputs */
+BOOST_AUTO_TEST_CASE (frame_info_hash_test)
+{
+	shared_ptr<dcp::MonoPictureAsset> mp (new dcp::MonoPictureAsset (dcp::Fraction (24, 1)));
+	shared_ptr<dcp::PictureAssetWriter> writer = mp->start_write ("build/test/frame_info_hash_test.mxf", dcp::SMPTE, false);
+
+	unsigned int seed = 42;
+
+	/* Check a few random frames */
+	check (&seed, writer, "7ddfb4f5cec76f95138c4377a829dd6f");
+	check (&seed, writer, "d6a91028bab60995b4fc49fbccd5c2ba");
+	check (&seed, writer, "9d8653644f49f692e4bbac34106a4897");
+}
diff --git a/test/recovery_test.cc b/test/recovery_test.cc
index 7482b8cc..6c4f6ac9 100644
--- a/test/recovery_test.cc
+++ b/test/recovery_test.cc
@@ -54,6 +54,7 @@ BOOST_AUTO_TEST_CASE (recovery)
 	int written_size = 0;
 	for (int i = 0; i < 24; ++i) {
 		dcp::FrameInfo info = writer->write (data, size);
+		BOOST_CHECK_EQUAL (info.hash, "cb90485a97ea5f7555cedc8a7afd473b");
 		written_size = info.size;
 	}
 
diff --git a/test/wscript b/test/wscript
index 653ab09d..b56de9cb 100644
--- a/test/wscript
+++ b/test/wscript
@@ -75,6 +75,7 @@ def build(bld):
                  encryption_test.cc
                  exception_test.cc
                  fraction_test.cc
+                 frame_info_hash_test.cc
                  gamma_transfer_function_test.cc
                  interop_load_font_test.cc
                  local_time_test.cc
-- 
2.30.2