test: added tests for clear

include/arraylist.h

@@ -7,6 +7,11 @@
 
 typedef struct ArrayList ArrayList;
 
+// FUCK, i forgot one of the main reasons i wanted to
+// implement arrays myself was because i needed 
+// array slices or something like this and i completely
+// forgot, fuck, guess i will implement it once i get
+// the tests done.
 typedef struct {
     ArrayList *array;
     size_t offset;