[cairo] [PATCH 1/3] test: Add group-state

[Andrea Canciani]

The interaction between the group and the state API is currently
untested and buggy. This test tries to use them incorrectly and check
that cairo notices the problem and marks the cr object with an error
status.
---
 test/Makefile.sources |    1 +
 test/group-state.c    |   96 +++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 97 insertions(+), 0 deletions(-)
 create mode 100644 test/group-state.c

diff --git a/test/Makefile.sources b/test/Makefile.sources
index 279b228..3210745 100644
--- a/test/Makefile.sources
+++ b/test/Makefile.sources
@@ -124,6 +124,7 @@ test_sources = \
 	gradient-zero-stops-mask.c			\
 	group-clip.c					\
 	group-paint.c					\
+	group-state.c					\
 	group-unaligned.c				\
 	half-coverage.c					\
 	halo.c						\
diff --git a/test/group-state.c b/test/group-state.c
new file mode 100644
index 0000000..a96b2e3
--- /dev/null
+++ b/test/group-state.c
@@ -0,0 +1,96 @@
+/* -*- Mode: c; c-basic-offset: 4; indent-tabs-mode: t; tab-width: 8; -*- */
+/*
+ * Copyright 2011 Andrea Canciani
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use, copy,
+ * modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Author: Andrea Canciani <ranma42 at gmail.com>
+ */
+
+#include "cairo-test.h"
+
+#define CHECK_STATUS(status)						\
+    do {								\
+	if (cairo_status (cr) != (status)) {				\
+	    cairo_test_log (ctx, "Expected status: %s\n",		\
+			    cairo_status_to_string (status));		\
+	    cairo_test_log (ctx, "Actual status: %s\n",			\
+			    cairo_status_to_string (cairo_status (cr))); \
+	    result = CAIRO_TEST_FAILURE;				\
+	}								\
+    } while (0)
+
+static void
+reinit_cairo (cairo_t **cr)
+{
+    if (*cr)
+	cairo_destroy (*cr);
+
+    *cr = cairo_create (cairo_image_surface_create (CAIRO_FORMAT_ARGB32, 1, 1));
+    cairo_surface_destroy (cairo_get_target (*cr));
+}
+
+static cairo_test_status_t
+preamble (cairo_test_context_t *ctx)
+{
+    cairo_t *cr;
+    cairo_test_status_t result = CAIRO_TEST_SUCCESS;
+
+    cr = NULL;
+
+    reinit_cairo (&cr);
+
+    /* cairo_restore() must fail with CAIRO_STATUS_INVALID_RESTORE if
+     * no matching cairo_save() call has been performed. */
+    cairo_test_log (ctx, "Checking save(); push(); restore();\n");
+    cairo_save (cr);
+    CHECK_STATUS (CAIRO_STATUS_SUCCESS);
+    cairo_push_group (cr);
+    CHECK_STATUS (CAIRO_STATUS_SUCCESS);
+    cairo_restore (cr);
+    CHECK_STATUS (CAIRO_STATUS_INVALID_RESTORE);
+
+
+    reinit_cairo (&cr);
+
+    /* cairo_restore() must fail with CAIRO_STATUS_INVALID_RESTORE if
+     * no matching cairo_save() call has been performed. */
+    cairo_test_log (ctx, "Checking push(); save(); pop();\n");
+    cairo_push_group (cr);
+    CHECK_STATUS (CAIRO_STATUS_SUCCESS);
+    cairo_save (cr);
+    CHECK_STATUS (CAIRO_STATUS_SUCCESS);
+    cairo_pop_group_to_source (cr);
+    CHECK_STATUS (CAIRO_STATUS_INVALID_POP_GROUP);
+
+
+    cairo_destroy (cr);
+
+    return result;
+}
+
+CAIRO_TEST (group_state,
+	    "Tests the interaction between state (cairo_save, cairo_restore) "
+	    "and group (cairo_push_group/cairo_pop_group) API",
+	    "api", /* keywords */
+	    NULL, /* requirements */
+	    0, 0,
+	    preamble, NULL)
-- 
1.7.1