Add test for creating a symlink node and change to using lstat

instead of `stat` to check file type.

haggis.c

@@ -530,7 +530,7 @@ haggis_node* haggis_create_node(char *file, haggis_algorithm a, haggis_linkmap *
 
     node = calloc(1, sizeof(haggis_node));
     if (node == NULL) return NULL;
-    if (stat(file, &st) != 0) {
+    if (lstat(file, &st) != 0) {
         free(node);
         return NULL;
     }

test/Makefile

@@ -66,6 +66,7 @@ tests      += fnv1a_hash_str
 tests      += linkmap_init
 tests      += linkmap_put
 tests      += create_dir_node
+tests      += create_symlink_node
 
 total      != echo $(tests) | wc -w | awk '{ print $$1 }'
 

test/create_dir_node.c

@@ -16,4 +16,5 @@ int main() {
     assert(memcmp(path, node->name.name, 6) == 0);
     haggis_node_deinit(node);
     haggis_linkmap_deinit(map);
+    return 0;
 }

test/create_symlink_node.c

@@ -0,0 +1,23 @@
+#include <assert.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "haggis.h"
+
+int main() {
+    haggis_linkmap *map;
+    haggis_node    *node;
+    char           *path = "output/dev";
+
+    map = haggis_linkmap_init();
+    assert(map != NULL);
+    symlink("device", "output/dev");
+    node = haggis_create_node(path, sha256, map);
+    assert(node->filetype.tag == softlink);
+    assert(memcmp(path, node->name.name, 10) == 0);
+    assert(memcmp(node->filetype.f_type.target.name, "device", 6) == 0);
+    haggis_node_deinit(node);
+    haggis_linkmap_deinit(map);
+    return 0;
+}