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let
name1 = "hello-1.0.2";
name2 = "hello";
name3 = "915resolution-0.5.2";
name4 = "xf86-video-i810-1.7.4";
eq = 0;
lt = builtins.sub 0 1;
gt = 1;
versionTest = v1: v2: expected:
let d1 = builtins.compareVersions v1 v2;
d2 = builtins.compareVersions v2 v1;
in d1 == builtins.sub 0 d2 && d1 == expected;
tests = [
((builtins.parseDrvName name1).name == "hello")
((builtins.parseDrvName name1).version == "1.0.2")
((builtins.parseDrvName name2).name == "hello")
((builtins.parseDrvName name2).version == "")
((builtins.parseDrvName name3).name == "915resolution")
((builtins.parseDrvName name3).version == "0.5.2")
((builtins.parseDrvName name4).name == "xf86-video-i810")
((builtins.parseDrvName name4).version == "1.7.4")
(versionTest "1.0" "2.3" lt)
(versionTest "2.1" "2.3" lt)
(versionTest "2.3" "2.3" eq)
(versionTest "2.5" "2.3" gt)
(versionTest "3.1" "2.3" gt)
(versionTest "2.3.1" "2.3" gt)
(versionTest "2.3.1" "2.3a" gt)
(versionTest "2.3pre1" "2.3" lt)
(versionTest "2.3pre3" "2.3pre12" lt)
(versionTest "2.3a" "2.3c" lt)
(versionTest "2.3pre1" "2.3c" lt)
(versionTest "2.3pre1" "2.3q" lt)
];
in (import ./lib.nix).and tests
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