ccwl: Support graphviz HTML strings.

* ccwl/graphviz.scm (<html-string>): New type.
(escape-id): Delete function.
(serialize): New function.
(graph->dot): Use serialize instead of escape-id.
* tests/graphviz.scm: New file.
("serialize HTML strings correctly"): New test case.
* Makefile.am (SCM_TESTS): Register it.

1 files changed, 48 insertions, 0 deletions

diff --git a/tests/graphviz.scm b/tests/graphviz.scm
new file mode 100644
index 0000000..5853616
--- /dev/null
+++ b/tests/graphviz.scm
@@ -0,0 +1,48 @@
+;;; ccwl --- Concise Common Workflow Language
+;;; Copyright © 2021 Arun Isaac <arunisaac@systemreboot.net>
+;;;
+;;; This file is part of ccwl.
+;;;
+;;; ccwl is free software: you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation, either version 3 of the License, or
+;;; (at your option) any later version.
+;;;
+;;; ccwl is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+;;; General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with ccwl.  If not, see <https://www.gnu.org/licenses/>.
+
+(use-modules (srfi srfi-64))
+
+(define graph->dot
+  (@@ (ccwl graphviz) graph->dot))
+
+(define graph
+  (@@ (ccwl graphviz) graph))
+
+(define graph-node
+  (@@ (ccwl graphviz) graph-node))
+
+(define html-string
+  (@@ (ccwl graphviz) html-string))
+
+(test-begin "graphviz")
+
+(test-equal "serialize HTML strings correctly"
+  "digraph foo {
+  bar [label=<<table><tr><td>bar</td></tr></table>>];
+}
+"
+  (call-with-output-string
+    (lambda (port)
+      (graph->dot
+       (graph 'foo
+              #:nodes (list (graph-node 'bar
+                                        `((label . ,(html-string "<table><tr><td>bar</td></tr></table>"))))))
+       port))))
+
+(test-end "graphviz")