1 files changed, 44 insertions, 0 deletions
diff --git a/src/shared/test-tables.h b/src/shared/test-tables.h
new file mode 100644
index 0000000..4eeda3b
--- /dev/null
+++ b/src/shared/test-tables.h
@@ -0,0 +1,44 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+typedef const char* (*lookup_t)(int);
+typedef int (*reverse_t)(const char*);
+
+static inline void _test_table(const char *name,
+                               lookup_t lookup,
+                               reverse_t reverse,
+                               int size,
+                               bool sparse) {
+        int i, boring = 0;
+
+        for (i = -1; i < size + 1; i++) {
+                const char* val = lookup(i);
+                int rev;
+
+                if (val) {
+                        rev = reverse(val);
+                        boring = 0;
+                } else {
+                        rev = reverse("--no-such--value----");
+                        boring += i >= 0;
+                }
+
+                if (boring < 1 || i == size)
+                        printf("%s: %d → %s → %d\n", name, i, val, rev);
+                else if (boring == 1)
+                        printf("%*s  ...\n", (int) strlen(name), "");
+
+                assert_se(!(i >= 0 && i < size ?
+                            sparse ? rev != i && rev != -1 : val == NULL || rev != i :
+                            val != NULL || rev != -1));
+        }
+}
+
+#define test_table(lower, upper) \
+        _test_table(STRINGIFY(lower), lower##_to_string, lower##_from_string, _##upper##_MAX, false)
+
+#define test_table_sparse(lower, upper) \
+        _test_table(STRINGIFY(lower), lower##_to_string, lower##_from_string, _##upper##_MAX, true)