[gtk+] Add a css parser test for border-spacing

[Matthias Clasen <matthiasc src gnome org>]

commit c4fd5bc233aa74f2144860dfb18d507e19206f9e
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Dec 10 20:41:07 2016 -0500

    Add a css parser test for border-spacing

 testsuite/css/parser/border-spacing.css     |   15 +++++++++++++++
 testsuite/css/parser/border-spacing.ref.css |   15 +++++++++++++++
 2 files changed, 30 insertions(+), 0 deletions(-)
---
diff --git a/testsuite/css/parser/border-spacing.css b/testsuite/css/parser/border-spacing.css
new file mode 100644
index 0000000..f280021
--- /dev/null
+++ b/testsuite/css/parser/border-spacing.css
@@ -0,0 +1,15 @@
+a {
+  border-spacing: 0;
+}
+
+b {
+  border-spacing: 10px;
+}
+
+c {
+  border-spacing: 10em;
+}
+
+d {
+  border-spacing: 1px 2em;
+}
diff --git a/testsuite/css/parser/border-spacing.ref.css b/testsuite/css/parser/border-spacing.ref.css
new file mode 100644
index 0000000..da4287e
--- /dev/null
+++ b/testsuite/css/parser/border-spacing.ref.css
@@ -0,0 +1,15 @@
+a {
+  border-spacing: 0 0;
+}
+
+b {
+  border-spacing: 10px 10px;
+}
+
+c {
+  border-spacing: 10em 10em;
+}
+
+d {
+  border-spacing: 1px 2em;
+}