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nixpkgs/pkgs/lib/tests.nix
Marc Weber 7ef915ebc8 nixpkgs lib: adding haskell's take
svn path=/nixpkgs/trunk/; revision=18848
2009-12-08 21:47:14 +00:00

113 lines
3.2 KiB
Nix

let inherit (builtins) add; in
with import ./default.nix;
runTests {
testId = {
expr = id 1;
expected = 1;
};
testConst = {
expr = const 2 3;
expected = 2;
};
testOr = {
expr = or true false;
expected = true;
};
testAnd = {
expr = and true false;
expected = false;
};
testFix = {
expr = fix (x: {a = if x ? a then "a" else "b";});
expected = {a = "a";};
};
testConcatMapStrings = {
expr = concatMapStrings (x: x + ";") ["a" "b" "c"];
expected = "a;b;c;";
};
testConcatStringsSep = {
expr = concatStringsSep "," ["a" "b" "c"];
expected = "a,b,c";
};
testFilter = {
expr = filter (x: x != "a") ["a" "b" "c" "a"];
expected = ["b" "c"];
};
testFold = {
expr = fold (builtins.add) 0 (range 0 100);
expected = 5050;
};
testEqStrict = {
expr = all id [
(eqStrict 2 2)
(!eqStrict 3 2)
(eqStrict [2 1] [2 1])
(!eqStrict [1 3] [1 2])
(eqStrict {a = 7; b = 20;} {b= 20; a = 7;})
(eqStrict [{a = 7; b = 20;}] [{b= 20; a = 7;}])
(eqStrict {a = [7 8]; b = 20;} {b= 20; a = [7 8];})
];
expected = true;
};
testTake = testAllTrue [
([] == (take 0 [ 1 2 3 ]))
([1] == (take 1 [ 1 2 3 ]))
([ 1 2 ] == (take 2 [ 1 2 3 ]))
([ 1 2 3 ] == (take 3 [ 1 2 3 ]))
([ 1 2 3 ] == (take 4 [ 1 2 3 ]))
];
testOverridableDelayableArgsTest = {
expr =
let res1 = defaultOverridableDelayableArgs id {};
res2 = defaultOverridableDelayableArgs id { a = 7; };
res3 = let x = defaultOverridableDelayableArgs id { a = 7; };
in (x.merge) { b = 10; };
res4 = let x = defaultOverridableDelayableArgs id { a = 7; };
in (x.merge) ( x: { b = 10; });
res5 = let x = defaultOverridableDelayableArgs id { a = 7; };
in (x.merge) ( x: { a = add x.a 3; });
res6 = let x = defaultOverridableDelayableArgs id { a = 7; mergeAttrBy = { a = add; }; };
y = x.merge {};
in (y.merge) { a = 10; };
resRem7 = res6.replace (a : removeAttrs a ["a"]);
resReplace6 = let x = defaultOverridableDelayableArgs id { a = 7; mergeAttrBy = { a = add; }; };
x2 = x.merge { a = 20; }; # now we have 27
in (x2.replace) { a = 10; }; # and override the value by 10
# fixed tests (delayed args): (when using them add some comments, please)
resFixed1 =
let x = defaultOverridableDelayableArgs id ( x : { a = 7; c = x.fixed.b; });
y = x.merge (x : { name = "name-${builtins.toString x.fixed.c}"; });
in (y.merge) { b = 10; };
strip = attrs : removeAttrs attrs ["merge" "replace"];
in all id
[ (eqStrict (strip res1) { })
(eqStrict (strip res2) { a = 7; })
(eqStrict (strip res3) { a = 7; b = 10; })
(eqStrict (strip res4) { a = 7; b = 10; })
(eqStrict (strip res5) { a = 10; })
(eqStrict (strip res6) { a = 17; })
(eqStrict (strip resRem7) {})
(eqStrict (strip resFixed1) { a = 7; b = 10; c =10; name = "name-10"; })
];
expected = true;
};
}