fix new config problems, tests all pass again

The tests pass but there's still a "NIF upgrade" error reported at the end
of each test run. Will fix later.

.gitignore

@@ -5,4 +5,5 @@ priv/*.so
 c_src/system
 c_src/wiredtiger-*/
 c_src/*.o
+deps
 *~

src/riak_kv_wiredtiger_backend.erl

@@ -2,7 +2,7 @@
 %%
 %% riak_kv_wiredtiger_backend: Use WiredTiger for Riak/KV storage
 %%
-%% Copyright (c) 2012 Basho Technologies, Inc.  All Rights Reserved.
+%% Copyright (c) 2012-2013 Basho Technologies, Inc.  All Rights Reserved.
 %%
 %% This file is provided to you under the Apache License,
 %% Version 2.0 (the "License"); you may not use this file
@@ -80,9 +80,9 @@ capabilities(_, _) ->
 
 %% @doc Start the WiredTiger backend
 -spec start(integer(), config()) -> {ok, state()} | {error, term()}.
-start(Partition, Config) ->
+start(Partition, Config0) ->
     %% Get the data root directory
-    case app_helper:get_prop_or_env(data_root, Config, wt) of
+    case app_helper:get_prop_or_env(data_root, Config0, wt) of
 	<<"">> ->
             lager:error("Failed to startup WiredTiger: data_root is not valid"),
             {error, data_root_unset};
@@ -93,6 +93,7 @@ start(Partition, Config) ->
             lager:error("Failed to startup WiredTiger: data_root is not set"),
             {error, data_root_unset};
         DataRoot ->
+            Config = lists:keydelete(data_root, 1, Config0),
 	    CacheSize =
 		case proplists:get_value(cache_size, Config) of
 		    undefined ->
@@ -508,13 +509,13 @@ best_guess_at_a_reasonable_cache_size(ChunkSizeInMB) ->
 -ifdef(TEST).
 
 simple_test_() ->
-    ?assertCmd("rm -rf test/wiredtiger-backend"),
+    ?assertCmd("rm -rf test/wt-backend"),
-    application:set_env(wt, data_root, "test/wiredtiger-backend"),
+    application:set_env(wt, data_root, "test/wt-backend"),
     temp_riak_kv_backend:standard_test(?MODULE, []).
 
 custom_config_test_() ->
-    ?assertCmd("rm -rf test/wiredtiger-backend"),
+    ?assertCmd("rm -rf test/wt-backend"),
     application:set_env(wt, data_root, ""),
-    temp_riak_kv_backend:standard_test(?MODULE, [{data_root, "test/wiredtiger-backend"}]).
+    temp_riak_kv_backend:standard_test(?MODULE, [{data_root, "test/wt-backend"}]).
 
 -endif.

src/temp_riak_kv_backend.erl

@@ -2,7 +2,7 @@
 %%
 %% riak_kv_backend: Riak backend behaviour
 %%
-%% Copyright (c) 2007-2010 Basho Technologies, Inc.  All Rights Reserved.
+%% Copyright (c) 2007-2013 Basho Technologies, Inc.  All Rights Reserved.
 %%
 %% This file is provided to you under the Apache License,
 %% Version 2.0 (the "License"); you may not use this file
@@ -36,6 +36,7 @@
 
 -ifdef(TEST).
 -include_lib("eunit/include/eunit.hrl").
+-compile(export_all).
 -export([standard_test/2]).
 -endif.
 

src/wt.erl

@@ -2,7 +2,7 @@
 %%
 %% wt: Erlang Wrapper for WiredTiger
 %%
-%% Copyright (c) 2012 Basho Technologies, Inc. All Rights Reserved.
+%% Copyright (c) 2012-2013 Basho Technologies, Inc. All Rights Reserved.
 %%
 %% This file is provided to you under the Apache License,
 %% Version 2.0 (the "License"); you may not use this file
@@ -64,7 +64,6 @@
          fold/3]).
 
 -ifdef(TEST).
--export([config_to_bin/1]).
 -ifdef(EQC).
 -include_lib("eqc/include/eqc.hrl").
 -define(QC_OUT(P),

src/wt_conn.erl

@@ -2,7 +2,7 @@
 %%
 %% wt_conn: manage a connection to WiredTiger
 %%
-%% Copyright (c) 2012 Basho Technologies, Inc. All Rights Reserved.
+%% Copyright (c) 2012-2013 Basho Technologies, Inc. All Rights Reserved.
 %%
 %% This file is provided to you under the Apache License,
 %% Version 2.0 (the "License"); you may not use this file
@@ -93,14 +93,14 @@ handle_call({open, Dir, Config, Caller}, _From, #state{conn=undefined}=State) ->
 	    true ->
 		[];
 	    false ->
-		[{cache_size, config_value(cache_size, Config, "512MB")}]
+		[config_value(cache_size, Config, "512MB")]
 	end,
     OptsC =
 	case proplists:is_defined(session_max, Config) of
 	    true ->
 		[];
 	    false ->
-		[{session_max, config_value(session_max, Config, 100)}]
+		[config_value(session_max, Config, 100)]
 	end,
     Opts = lists:merge([OptsA, OptsB, OptsC, Config]),
     {Reply, NState} =
@@ -233,14 +233,14 @@ simple_test_() ->
        end}]}.
 
 open_one() ->
-    {ok, Ref} = open("test/wt-backend", [{session_max, 20}]),
+    {ok, Ref} = open("test/wt-backend", [{create,true},{session_max, 20}]),
     true = is_open(),
     close(Ref),
     false = is_open(),
     ok.
 
 open_and_wait(Pid) ->
-    {ok, Ref} = open("test/wt-backend"),
+    {ok, Ref} = open("test/wt-backend", [{create,true}]),
     Pid ! open,
     receive
         close ->