Make check_one_frame more verbose when it fails.

diff --git a/test/test.cc b/test/test.cc
index b1d4fa158e670ca820a83deb56b03bbd22c7dde6..57f4ae203afdf7574bae7fb7bb43c08928a9b249 100644 (file)
--- a/test/test.cc
+++ b/test/test.cc
@@ -840,9 +840,12 @@ check_one_frame (boost::filesystem::path dcp_dir, int64_t index, boost::filesyst
        int off = 0;
        for (int y = 0; y < ref_image->size().height; ++y) {
                for (int x = 0; x < ref_image->size().width; ++x) {
-                       BOOST_REQUIRE_EQUAL (ref_image->data(0)[off], image->data(0)[off]);
-                       BOOST_REQUIRE_EQUAL (ref_image->data(1)[off], image->data(1)[off]);
-                       BOOST_REQUIRE_EQUAL (ref_image->data(2)[off], image->data(2)[off]);
+                       auto x_error = std::abs(ref_image->data(0)[off] - image->data(0)[off]);
+                       BOOST_REQUIRE_MESSAGE(x_error == 0, "x component at " << x << "," << y << " differs by " << x_error);
+                       auto y_error = std::abs(ref_image->data(1)[off] - image->data(1)[off]);
+                       BOOST_REQUIRE_MESSAGE(y_error == 0, "y component at " << x << "," << y << " differs by " << y_error);
+                       auto z_error = std::abs(ref_image->data(2)[off] - image->data(2)[off]);
+                       BOOST_REQUIRE_MESSAGE(z_error == 0, "z component at " << x << "," << y << " differs by " << z_error);
                        ++off;
                }
        }