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tvl-depot/nix/readTree/tests/default.nix

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feat(nix/readTree): add tests of the README example First step to slowly giving readTree some coverage, so we can do refactoring without breaking functionality. Change-Id: If25a8c0fa9c4ac7472c0473372f10a9326cccaf7 Reviewed-on: https://cl.tvl.fyi/c/depot/+/2465 Reviewed-by: tazjin <mail@tazj.in> Tested-by: BuildkiteCI
2021-01-30 07:03:20 +01:00
{ depot, lib, ... }:
let
inherit (depot.nix.runTestsuite)
runTestsuite
it
assertEq
assertThrows
;
tree-ex = depot.nix.readTree {} ./test-example;
feat(nix/readTree): add tests of the traversal logic in README This should closely match the documented behaviour. It might still be missing some edge cases of course. Change-Id: I5c75fa045d5f3be8cf5eab787a02644500c14522 Reviewed-on: https://cl.tvl.fyi/c/depot/+/2466 Reviewed-by: tazjin <mail@tazj.in> Tested-by: BuildkiteCI
2021-01-30 07:40:33 +01:00
example = it "corresponds to the README example" [
feat(nix/readTree): add tests of the README example First step to slowly giving readTree some coverage, so we can do refactoring without breaking functionality. Change-Id: If25a8c0fa9c4ac7472c0473372f10a9326cccaf7 Reviewed-on: https://cl.tvl.fyi/c/depot/+/2465 Reviewed-by: tazjin <mail@tazj.in> Tested-by: BuildkiteCI
2021-01-30 07:03:20 +01:00
(assertEq "third_party attrset"
(lib.isAttrs tree-ex.third_party
&& (! lib.isDerivation tree-ex.third_party))
true)
(assertEq "third_party attrset other attribute"
tree-ex.third_party.favouriteColour
"orange")
(assertEq "rustpkgs attrset aho-corasick"
tree-ex.third_party.rustpkgs.aho-corasick
"aho-corasick")
(assertEq "rustpkgs attrset serde"
tree-ex.third_party.rustpkgs.serde
"serde")
(assertEq "tools cheddear"
"cheddar"
tree-ex.tools.cheddar)
(assertEq "tools roquefort"
tree-ex.tools.roquefort
"roquefort")
];
feat(nix/readTree): add tests of the traversal logic in README This should closely match the documented behaviour. It might still be missing some edge cases of course. Change-Id: I5c75fa045d5f3be8cf5eab787a02644500c14522 Reviewed-on: https://cl.tvl.fyi/c/depot/+/2466 Reviewed-by: tazjin <mail@tazj.in> Tested-by: BuildkiteCI
2021-01-30 07:40:33 +01:00
tree-tl = depot.nix.readTree {} ./test-tree-traversal;
traversal-logic = it "corresponds to the traversal logic in the README" [
(assertEq "skip subtree default.nix is read"
tree-tl.skip-subtree.but
"the default.nix is still read")
(assertEq "skip subtree a/default.nix is skipped"
(tree-tl.skip-subtree ? a)
false)
(assertEq "skip subtree b/c.nix is skipped"
(tree-tl.skip-subtree ? b)
false)
(assertEq "skip subtree a/default.nix would be read without .skip-subtree"
(tree-tl.no-skip-subtree.a)
"am I subtree yet?")
(assertEq "skip subtree b/c.nix would be read without .skip-subtree"
(tree-tl.no-skip-subtree.b.c)
"cool")
(assertEq "default.nix attrset is merged with siblings"
tree-tl.default-nix.no
"siblings should be read")
(assertEq "default.nix means sibling isn’t read"
(tree-tl.default-nix ? sibling)
false)
(assertEq "default.nix means subdirs are still read and merged into default.nix"
(tree-tl.default-nix.subdir.a)
"but I’m picked up")
(assertEq "default.nix can be not an attrset"
tree-tl.default-nix.no-merge
"I’m not merged with any children")
(assertEq "default.nix is not an attrset -> children are not merged"
(tree-tl.default-nix.no-merge ? subdir)
false)
(assertEq "default.nix can contain a derivation"
(lib.isDerivation tree-tl.default-nix.can-be-drv)
true)
(assertEq "Even if default.nix is a derivation, children are traversed and merged"
tree-tl.default-nix.can-be-drv.subdir.a
"Picked up through the drv")
(assertEq "default.nix drv is not changed by readTree"
tree-tl.default-nix.can-be-drv
(import ./test-tree-traversal/default-nix/can-be-drv/default.nix {}))
];
feat(nix/readTree): give better error message when not a function When a file is added to the depot tree that is picked up by read-tree, but it’s not a function like ({...}: {}), `readTree` will fail on the function application, leading to a bad error message. We can do slightly better, by checking the type and throwing a nicer trace message. `assertMsg` is copied from `nixpkgs/lib/assert.nix`, since at this point we don’t have a reference to the lib. There is another evaluation failure that can happen, which is when the function we try to call does not have dots; however, nix does not provide any inflection capabilies for checking whether a function attrset is open (`builtins.functionArgs` only tells us the attrs it mentions explicitly). Maybe the locality of the error could be improved somehow. Change-Id: Ibe38ce78bb56902075f7c31f2eeeb93485b34be3 Reviewed-on: https://cl.tvl.fyi/c/depot/+/2469 Tested-by: BuildkiteCI Reviewed-by: tazjin <mail@tazj.in>
2021-01-30 09:25:05 +01:00
# these each call readTree themselves because the throws have to happen inside assertThrows
wrong = it "cannot read these files and will complain" [
(assertThrows "this file is not a function"
(depot.nix.readTree {} ./test-wrong-not-a-function).not-a-function)
# can’t test for that, assertThrows can’t catch this error
# (assertThrows "this file is a function but doesn’t have dots"
# (depot.nix.readTree {} ./test-wrong-no-dots).no-dots-in-function)
];
feat(nix/readTree): add tests of the README example First step to slowly giving readTree some coverage, so we can do refactoring without breaking functionality. Change-Id: If25a8c0fa9c4ac7472c0473372f10a9326cccaf7 Reviewed-on: https://cl.tvl.fyi/c/depot/+/2465 Reviewed-by: tazjin <mail@tazj.in> Tested-by: BuildkiteCI
2021-01-30 07:03:20 +01:00
in runTestsuite "readTree" [
example
feat(nix/readTree): add tests of the traversal logic in README This should closely match the documented behaviour. It might still be missing some edge cases of course. Change-Id: I5c75fa045d5f3be8cf5eab787a02644500c14522 Reviewed-on: https://cl.tvl.fyi/c/depot/+/2466 Reviewed-by: tazjin <mail@tazj.in> Tested-by: BuildkiteCI
2021-01-30 07:40:33 +01:00
traversal-logic
feat(nix/readTree): give better error message when not a function When a file is added to the depot tree that is picked up by read-tree, but it’s not a function like ({...}: {}), `readTree` will fail on the function application, leading to a bad error message. We can do slightly better, by checking the type and throwing a nicer trace message. `assertMsg` is copied from `nixpkgs/lib/assert.nix`, since at this point we don’t have a reference to the lib. There is another evaluation failure that can happen, which is when the function we try to call does not have dots; however, nix does not provide any inflection capabilies for checking whether a function attrset is open (`builtins.functionArgs` only tells us the attrs it mentions explicitly). Maybe the locality of the error could be improved somehow. Change-Id: Ibe38ce78bb56902075f7c31f2eeeb93485b34be3 Reviewed-on: https://cl.tvl.fyi/c/depot/+/2469 Tested-by: BuildkiteCI Reviewed-by: tazjin <mail@tazj.in>
2021-01-30 09:25:05 +01:00
wrong
feat(nix/readTree): add tests of the README example First step to slowly giving readTree some coverage, so we can do refactoring without breaking functionality. Change-Id: If25a8c0fa9c4ac7472c0473372f10a9326cccaf7 Reviewed-on: https://cl.tvl.fyi/c/depot/+/2465 Reviewed-by: tazjin <mail@tazj.in> Tested-by: BuildkiteCI
2021-01-30 07:03:20 +01:00
]
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