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diff --git a/test/path-precision.c b/test/path-precision.c
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+/*
+ * Copyright © 2008 Chris Wilson
+ *
+ * Permission to use, copy, modify, distribute, and sell this software
+ * and its documentation for any purpose is hereby granted without
+ * fee, provided that the above copyright notice appear in all copies
+ * and that both that copyright notice and this permission notice
+ * appear in supporting documentation, and that the name of
+ * Chris Wilson not be used in advertising or publicity pertaining to
+ * distribution of the software without specific, written prior
+ * permission. Chris Wilson makes no representations about the
+ * suitability of this software for any purpose. It is provided "as
+ * is" without express or implied warranty.
+ *
+ * CHRIS WILSON DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS, IN NO EVENT SHALL CHRIS WILSON BE LIABLE FOR ANY SPECIAL,
+ * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
+ * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
+ * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * Author: Chris Wilson <chris@chris-wilson.co.uk>
+ *
+ * Based on an example by Dirk "krit" Schulze found during WebKit integration.
+ */
+
+#include "cairo-test.h"
+
+/* we know that this is an inherent limitation in cairo */
+#define FAIL CAIRO_TEST_XFAILURE
+
+/* Test the idempotency of path construction and copying */
+
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+ cairo_path_data_t path_data[] = {
+ { { CAIRO_PATH_MOVE_TO, 2 }, },
+ { { 95.000000, 40.000000 }, },
+
+ { { CAIRO_PATH_LINE_TO, 2 }, },
+ { { 94.960533, 41.255810 }, },
+
+ { { CAIRO_PATH_LINE_TO, 2 }, },
+ { { 94.842293, 42.50666 }, },
+
+ { { CAIRO_PATH_LINE_TO, 2 }, },
+ { { 94.645744, 43.747627 }, },
+
+ { { CAIRO_PATH_LINE_TO, 2 }, },
+ { { 94.371666, 44.973797 }, },
+ };
+ const cairo_test_context_t *ctx = cairo_test_get_context (cr);
+ cairo_path_t path, *path_copy;
+ int i, j, n;
+ cairo_test_status_t result = CAIRO_TEST_SUCCESS;
+
+ path.status = CAIRO_STATUS_SUCCESS;
+ path.num_data = ARRAY_LENGTH (path_data);
+ path.data = path_data;
+
+ cairo_new_path (cr);
+ cairo_append_path (cr, &path);
+ path_copy = cairo_copy_path (cr);
+
+ if (path_copy->status)
+ return cairo_test_status_from_status (ctx, path_copy->status);
+
+ for (i = j = n = 0;
+ i < path.num_data && j < path_copy->num_data;
+ i += path.data[i].header.length,
+ j += path_copy->data[j].header.length,
+ n++)
+ {
+ const cairo_path_data_t *src, *dst;
+
+ src = &path.data[i];
+ dst = &path_copy->data[j];
+
+ if (src->header.type != dst->header.type) {
+ cairo_test_log (ctx,
+ "Paths differ in header type after %d operations.\n"
+ "Expected path operation %d, found %d.\n",
+ n, src->header.type, dst->header.type);
+ result = FAIL;
+ break;
+ }
+
+ if (memcmp (&src[1].point, &dst[1].point, sizeof (src->point))) {
+ cairo_test_log (ctx,
+ "Paths differ in coordinates after %d operations.\n"
+ "Expected point (%f, %f), found (%f, %f).\n",
+ n,
+ src[1].point.x, src[1].point.y,
+ dst[1].point.x, dst[1].point.y);
+ result = FAIL;
+ break;
+ }
+ }
+
+ cairo_path_destroy (path_copy);
+ return result;
+}
+
+CAIRO_TEST (path_precision,
+ "Check that the path append/copy is idempotent.",
+ "api", /* keywords */
+ NULL, /* requirements */
+ 0, 0,
+ NULL, draw)