1 files changed, 64 insertions, 0 deletions
diff --git a/tests/lib/test_graph.c b/tests/lib/test_graph.c
new file mode 100644
index 0000000..86af02a
--- /dev/null
+++ b/tests/lib/test_graph.c
@@ -0,0 +1,64 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Test graph data structure.
+ * Copyright (C) 2018  Cumulus Networks, Inc.
+ *                     Quentin Young
+ */
+#include <zebra.h>
+#include <graph.h>
+#include <memory.h>
+#include <buffer.h>
+
+#define NUMNODES 32
+
+static void graph_custom_print_cb(struct graph_node *gn, struct buffer *buf)
+{
+	char nbuf[64];
+	char *gname = gn->data;
+
+	for (unsigned int i = 0; i < vector_active(gn->to); i++) {
+		struct graph_node *adj = vector_slot(gn->to, i);
+		char *name = adj->data;
+
+		snprintf(nbuf, sizeof(nbuf), "    n%s -> n%s;\n", gname, name);
+		buffer_putstr(buf, nbuf);
+	}
+}
+
+int main(int argc, char **argv)
+{
+	struct graph *g = graph_new();
+	struct graph_node *gn[NUMNODES];
+	char names[NUMNODES][16];
+
+	/* create vertices */
+	for (unsigned int i = 0; i < NUMNODES; i++) {
+		snprintf(names[i], sizeof(names[i]), "%u", i);
+		gn[i] = graph_new_node(g, names[i], NULL);
+	}
+
+	/* create edges */
+	for (unsigned int i = 1; i < NUMNODES - 1; i++) {
+		graph_add_edge(gn[0], gn[i]);
+		graph_add_edge(gn[i], gn[i + 1]);
+	}
+	graph_add_edge(gn[0], gn[NUMNODES - 1]);
+	graph_add_edge(gn[NUMNODES - 1], gn[1]);
+
+	/* print DOT */
+	char *dumped = graph_dump_dot(g, gn[0], graph_custom_print_cb);
+
+	fprintf(stdout, "%s", dumped);
+	XFREE(MTYPE_TMP, dumped);
+
+	/* remove some edges */
+	for (unsigned int i = NUMNODES - 1; i > NUMNODES / 2; --i)
+		for (unsigned int j = 0; j < NUMNODES; j++)
+			graph_remove_edge(gn[i], gn[j]);
+
+	/* remove some nodes */
+	for (unsigned int i = 0; i < NUMNODES / 2; i++)
+		graph_delete_node(g, gn[i]);
+
+	graph_delete_graph(g);
+}