First test case

c_src/esqlite_nif.c

@@ -2,43 +2,59 @@
  * esqlite -- an erlang sqlite nif.
 */
 
+#include <stdio.h> /* for debugging */
 #include <erl_nif.h>
 
 #include "sqlite3.h"
 
-#define MAX_PATHNAME 512 /* unfortunately not in sqlite.h */
+#define MAX_PATHNAME 512 /* unfortunately not in sqlite.h. */
+
+static ERL_NIF_TERM _atom_ok;
+static ERL_NIF_TERM _atom_error;
 
 /*
  * Open database. Expects utf-8 input
 */
-static ERL_NIF_TERM eisqlite_open_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
+static ERL_NIF_TERM esqlite_open_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
 {
     int rc;
     char filename[MAX_PATHNAME];
-    sqlite3
+    sqlite3 *db;
    
     /* TODO ignore the utf-8 stuff for now */
     if(!enif_get_string(env, argv[0], filename, MAX_PATHNAME, ERL_NIF_LATIN1))
         return enif_make_badarg(env);   
 
-
+    /* open the database */
     rc = sqlite3_open(filename, &db);
     if( rc ) {
       fprintf(stderr, "Can't open database: %s\n", sqlite3_errmsg(db));
       sqlite3_close(db);
       /* maak een error tuple */
     }
+
+    /* and wrap it in an erlang resource */
+    fprintf(stderr, "The database is open.\n");
+
+    sqlite3_close(db);
+
+    fprintf(stderr, "And closed\n");
     
+    return enif_make_tuple2(env, _atom_ok, _atom_ok);
 }
 
 
 static int on_load(ErlNifEnv* env, void** priv, ERL_NIF_TERM info)
 {
+  _atom_ok = enif_make_atom(env, "ok");
+  _atom_error = enif_make_atom(env, "error");
+
   return 0;
 }
 
 
 static ErlNifFunc nif_funcs[] = {
+  {"open", 1, esqlite_open_nif},
 };
 
 ERL_NIF_INIT(esqlite, nif_funcs, on_load, NULL, NULL, NULL);

src/esqlite.erl

@@ -5,6 +5,8 @@
 -module(esqlite).
 -author("Maas-Maarten Zeeman <mmzeeman@xs4all.nl>").
 
+-export([open/1]).
+
 -on_load(init/0).
 
 init() ->
@@ -12,6 +14,6 @@ init() ->
 
 %% @doc Open a new database connection
 %%
-open(Name) ->
-    ok.
+open(_Filename) ->
+    exit(nif_library_not_loaded).
 

test/esqlite_test.erl

@@ -0,0 +1,10 @@
+%%
+%% Test suite for esqlite.
+%%
+
+-module(esqlite_test).
+
+-include_lib("eunit/include/eunit.hrl").
+
+open_test() ->
+    {ok, C} = esqlite:open("test.db").