Add hash map implementation

tests/hashset/test_hashset.c

@@ -1,6 +1,7 @@
 // vim:fileencoding=utf-8:foldmethod=marker
 
 #include "wapp.h"
+#include "test_hashset.h"
 
 wp_persist inline WpU8Stream encoder(void *data);
 wp_persist inline b8 key_eq(void *a, void *b);
@@ -27,6 +28,13 @@ WpTestFuncResult test_hashset_alloc(void) {
 	return wpTesterResult(result);
 }
 
+WpTestFuncResult test_hashset_get_item_size(void) {
+	b8 result     = true;
+	WpHashSet set = wpHashSet(WpStr8, encoder, key_eq, 8);
+	result        = result && wpHashSetItemSize(&set) == sizeof(WpStr8);
+	return wpTesterResult(result);
+}
+
 WpTestFuncResult test_hashset_find(void) {
 	b8 result        = true;
 	WpHashSet set    = wpHashSet(WpStr8, encoder, key_eq, 8);
@@ -70,7 +78,7 @@ WpTestFuncResult test_hashset_insert_capped(void) {
 
 	result = result && wpHashSetCapacity(&set) == 4 && wpHashSetCount(&set) == 3;
 	for (u64 i = 0; i < 3; ++i) {
-		result = result && wpStr8Equal(wpArrayGet(WpStr8, set.keys, i), &keys[i]);
+		result = result && wpStr8Equal(&wpHashSetItems(WpStr8, &set)[i], &keys[i]);
 	}
 
 	return wpTesterResult(result);
@@ -95,7 +103,7 @@ WpTestFuncResult test_hashset_insert_alloc(void) {
 	}
 
 	result = result && set.keys != set_keys && wpHashSetCapacity(&set) == 8 && wpHashSetCount(&set) == 4;
-	for (u64 i = 0; i < 3; ++i) {
+	for (u64 i = 0; i < wpArrayCount(keys); ++i) {
 		result = result && wpStr8Equal(&wpHashSetItems(WpStr8, &set)[i], &keys[i]);
 	}