Add new test case degenerate-path to show current 'bug'

test/Makefile.am

@@ -20,6 +20,7 @@ dash-caps-joins			\
 dash-scale			\
 dash-offset-negative		\
 dash-zero-length		\
+degenerate-path			\
 device-offset			\
 device-offset-positive		\
 extend-reflect			\
@@ -178,6 +179,9 @@ dash-offset-negative-ps-argb32-ref.png			\
 dash-zero-length-ref.png				\
 dash-zero-length-rgb24-ref.png				\
 dash-zero-length-ps-argb32-ref.png			\
+degenerate-path-ref.png					\
+degenerate-path-rgb24-ref.png				\
+degenerate-path-ps-argb32-ref.png			\
 device-offset-ref.png					\
 device-offset-positive-ref.png				\
 fill-and-stroke-ref.png					\

test/degenerate-path.c

@@ -0,0 +1,68 @@
+/*
+ * Copyright © 2006 Jeff Muizelaar
+ *
+ * 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
+ * Jeff Muizelaar not be used in advertising or publicity pertaining to
+ * distribution of the software without specific, written prior
+ * permission. Jeff Muizelaar makes no representations about the
+ * suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * JEFF MUIZELAAR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
+ * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS, IN NO EVENT SHALL JEFF MUIZELAAR 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: Jeff Muizelaar <jeff@infidigm.net>
+ */
+
+#include "cairo-test.h"
+
+#define IMAGE_WIDTH 40
+#define IMAGE_HEIGHT 22
+
+cairo_test_t test = {
+    "degenerate-path",
+    "Tests the behaviour of degenerate paths with different cap types",
+    IMAGE_WIDTH, IMAGE_HEIGHT
+};
+
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof(arr[0]))
+
+static cairo_test_status_t
+draw (cairo_t *cr, int width, int height)
+{
+    const cairo_line_cap_t cap[] = { CAIRO_LINE_CAP_ROUND, CAIRO_LINE_CAP_SQUARE, CAIRO_LINE_CAP_BUTT };
+    int i;
+
+    cairo_set_source_rgb (cr, 1, 0, 0);
+
+    for (i=0; i<ARRAY_SIZE(cap); i++) {
+	cairo_set_line_cap (cr, cap[i]);
+
+	cairo_set_line_width (cr, 6);
+	cairo_move_to (cr, 6, 6);
+	cairo_line_to (cr, 6, 6);
+	cairo_stroke (cr);
+
+	cairo_move_to (cr, 6, 15);
+	cairo_close_path (cr);
+	cairo_stroke (cr);
+
+	cairo_translate (cr, 12, 0);
+    }
+    return CAIRO_TEST_SUCCESS;
+}
+
+int
+main (void)
+{
+    return cairo_test (&test, draw);
+}