tests/functional/lang: Clean up lib.nix

That file was written once in 2008 and never updated since, and let's
just say that a lot of things have changed since

Change-Id: I66b0c87ecbba6ca653470966c9514edb21882ca3

tests/functional/lang/eval-okay-attrnames.exp

@@ -1 +1 @@
-"newxfoonewxy"
+[ "newx" "foo" "newx" "y" ]

tests/functional/lang/eval-okay-attrnames.nix

@@ -1,5 +1,3 @@
-with import ./lib.nix;
-
 let
 
   attrs = {y = "y"; x = "x"; foo = "foo";} // rec {x = "newx"; bar = x;};
@@ -8,4 +6,6 @@ let
 
   values = map (name: builtins.getAttr name attrs) names;
 
-in assert values == builtins.attrValues attrs; concat values
+in
+assert values == builtins.attrValues attrs;
+values

tests/functional/lang/eval-okay-autoargs.nix

@@ -11,5 +11,5 @@ in
 }:
 
 {
-  result = lib.concat [xyzzy xyzzy2 fb];
+  result = lib.id (builtins.concatStringsSep "" [xyzzy xyzzy2 fb]);
 }

tests/functional/lang/eval-okay-closure.nix

@@ -8,6 +8,6 @@ let
       else [{key = builtins.sub key 9;} {key = builtins.sub key 13; foo = true;}];
   };
 
-  sort = (import ./lib.nix).sortBy (a: b: builtins.lessThan a.key b.key);
+  sort = builtins.sort (a: b: builtins.lessThan a.key b.key);
 
 in sort closure

tests/functional/lang/eval-okay-flatten.exp

@@ -1 +0,0 @@
-"1234567"

tests/functional/lang/eval-okay-flatten.nix

@@ -1,8 +0,0 @@
-with import ./lib.nix;
-
-let
-
-  l = ["1" "2" ["3" ["4"] ["5" "6"]] "7"];
-
-in
-concat (flatten l)

tests/functional/lang/eval-okay-list.nix

@@ -1,3 +1 @@
-with import ./lib.nix;
-
-concat ["foo" "bar" "bla" "test"]
+builtins.concatStringsSep "" ["foo" "bar" "bla" "test"]

tests/functional/lang/eval-okay-listtoattrs.nix

@@ -1,6 +1,4 @@
 # this test shows how to use listToAttrs and that evaluation is still lazy (throw isn't called)
-with import ./lib.nix;
-
 let
   asi = name: value : { inherit name value; };
   list = [ ( asi "a" "A" ) ( asi "b" "B" ) ];
@@ -8,4 +6,5 @@ let
   b = builtins.listToAttrs ( list ++ list );
   r = builtins.listToAttrs [ (asi "result" [ a b ]) ( asi "throw" (throw "this should not be thrown")) ];
   x = builtins.listToAttrs [ (asi "foo" "bar") (asi "foo" "bla") ];
-in concat (map (x: x.a) r.result) + x.foo
+in
+builtins.concatStringsSep "" (map (x: x.a) r.result) + x.foo

tests/functional/lang/eval-okay-map.nix

@@ -1,3 +1 @@
-with import ./lib.nix;
-
-concat (map (x: x + "bar") [ "foo" "bla" "xyzzy" ])
+builtins.concatStringsSep "" (map (x: x + "bar") [ "foo" "bla" "xyzzy" ])

tests/functional/lang/lib.nix

@@ -7,15 +7,7 @@ rec {
     then nul
     else op (head list) (fold op nul (tail list));
 
-  concat =
-    fold (x: y: x + y) "";
-
-  and = fold (x: y: x && y) true;
-
-  flatten = x:
-    if isList x
-    then fold (x: y: (flatten x) ++ y) [] x
-    else [x];
+  and = all id;
 
   sum = foldl' (x: y: add x y) 0;
 
@@ -23,33 +15,7 @@ rec {
     let lenFileName = stringLength fileName;
         lenExt = stringLength ext;
     in !(lessThan lenFileName lenExt) &&
-       substring (sub lenFileName lenExt) lenFileName fileName == ext;
-
-  # Split a list at the given position.
-  splitAt = pos: list:
-    if pos == 0 then {first = []; second = list;} else
-    if list == [] then {first = []; second = [];} else
-    let res = splitAt (sub pos 1) (tail list);
-    in {first = [(head list)] ++ res.first; second = res.second;};
-
-  # Stable merge sort.
-  sortBy = comp: list:
-    if lessThan 1 (length list)
-    then
-      let
-        split = splitAt (div (length list) 2) list;
-        first = sortBy comp split.first;
-        second = sortBy comp split.second;
-      in mergeLists comp first second
-    else list;
-
-  mergeLists = comp: list1: list2:
-    if list1 == [] then list2 else
-    if list2 == [] then list1 else
-    if comp (head list2) (head list1) then [(head list2)] ++ mergeLists comp list1 (tail list2) else
-    [(head list1)] ++ mergeLists comp (tail list1) list2;
-
-  id = x: x;
+       substring (sub lenFileName lenExt) lenFileName fileName == ext;  id = x: x;
 
   const = x: y: x;