Added test for replacing a hashmap entry

hmap.c

@@ -32,6 +32,7 @@
 
 #include <stddef.h>
 #include <stdint.h>
+#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sys/stat.h>
@@ -174,7 +175,7 @@ int hmap_expand(hmap *map) {
 void* hmap_insert(hmap *map, void *key, void *data) {
     hmap_node *node;
     size_t idx;
-    hmap_node *ret = NULL;
+    void *ret = NULL;
 
     if (map->len >= map->capacity / 2) {
         if (hmap_expand(map)) return NULL;
@@ -187,11 +188,11 @@ void* hmap_insert(hmap *map, void *key, void *data) {
     } else {
         ret = hmap_node_attach(&map->buckets[idx], node, map->keysize);
     }
-    map->len++;
-    if (ret == NULL)
+    if (ret == NULL) {
+        map->len++;
         return NULL;
-    else
-        return ret->data;
+    } else
+        return ret;
 }
 
 void* hmap_get(hmap *map, void *key) {

test/Makefile

@@ -64,6 +64,7 @@ tests      += fnv1a_hash_str
 tests      += init_hmap
 tests      += hmap_insert
 tests      += hmap_get
+tests      += hmap_replace
 
 total      != echo $(tests) | wc -w | awk '{ print $$1 }'
 

test/hmap_replace.c

@@ -0,0 +1,37 @@
+#include "haggis.h"
+#include "haggis_private.h"
+#include <assert.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+int main() {
+    hmap *map;
+    struct stat st;
+    char *data;
+    union {
+        ino_t val;
+        u8 bytes[sizeof(ino_t)];
+    } nod;
+    char * ret = NULL;
+
+    map = hmap_init(sizeof(ino_t));
+    assert(map != NULL);
+    data = "Makefile";
+    stat(data, &st);
+    nod.val = st.st_ino;
+    ret = hmap_insert(map, &nod.bytes[0], data);
+    assert(ret == NULL);
+    assert(map->len == 1);
+    ret = hmap_get(map, &nod.bytes[0]);
+    assert(memcmp(ret, data, 7) == 0);
+    ret = hmap_insert(map, &nod.bytes[0], "testdata");
+    assert(ret != NULL);
+    assert(memcmp(ret, data, 8) == 0);
+    assert(map->len == 1);
+    ret = hmap_get(map, &nod.bytes[0]);
+    assert(memcmp(ret, "testdata", 9) == 0);
+    hmap_deinit(map);
+    return 0;
+}