1 files changed, 71 insertions, 0 deletions
diff --git a/libnormalform_singleton.c b/libnormalform_singleton.c
new file mode 100644
index 0000000..b850b98
--- /dev/null
+++ b/libnormalform_singleton.c
@@ -0,0 +1,71 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+#ifndef TEST
+
+
+extern inline LIBNORMALFORM_SENTENCE *(libnormalform_singleton)(struct libnormalform_map *);
+
+
+#else
+
+
+int
+main(void)
+{
+	TEST_BEGIN;
+
+	struct libnormalform_map dom1, dom2;
+	struct libnormalform_mapping map[3];
+	LIBNORMALFORM_SENTENCE *a, *b;
+
+	dom1.mappings = map;
+	memset(map, 0, sizeof(map));
+
+	ASSUME(a = libnormalform_singleton(&dom1));
+	ASSERT(a->type == TYPE_ONE);
+
+	ASSUME(b = libnormalform_singleton(&dom2));
+	ASSERT_NOTEQUAL(a, b);
+	libnormalform_free(b);
+
+	ASSUME(b = libnormalform_singleton(&dom1));
+	ASSERT(b != a);
+	ASSERT_EQUAL(a, b);
+	libnormalform_free(b);
+
+	ASSUME(b = libnormalform_empty(&dom1));
+	ASSERT_NOTEQUAL(a, b);
+	libnormalform_free(b);
+
+	ASSUME(b = libnormalform_nonempty(&dom1));
+	ASSERT_NOTEQUAL(a, b);
+	libnormalform_free(b);
+
+	ASSUME(b = libnormalform_not(libnormalform_singleton(&dom1)));
+	ASSERT(b->type == TYPE_NOT_ONE);
+	ASSERT_INVEQUAL(a, b);
+	libnormalform_free(b);
+
+	ASSUME(b = libnormalform_not(libnormalform_singleton(&dom2)));
+	ASSERT_NOTEQUAL(a, b);
+	libnormalform_free(b);
+
+	dom1.nmappings = 0;
+	ASSERT(libnormalform_evaluate(a) == 0);
+
+	dom1.nmappings = 1;
+	ASSERT(libnormalform_evaluate(a) == 1);
+
+	dom1.nmappings = 2;
+	ASSERT(libnormalform_evaluate(a) == 0);
+
+	dom1.nmappings = 3;
+	ASSERT(libnormalform_evaluate(a) == 0);
+
+	libnormalform_free(a);
+
+	TEST_END;
+}
+
+
+#endif