lean4-htt/tests/lean/run/catchThe.lean
Kim Morrison 3a457e6ad6
chore: use #guard_msgs in run tests (#4175)
Many of our tests in `tests/lean/run/` produce output from `#eval` (or
`#check`) statements, that is then ignored.

This PR tries to capture all the useful output using `#guard_msgs`. I've
only done a cursory check that the output is still sane --- there is a
chance that some "unchecked" tests have already accumulated regressions
and this just cements them!

In the other direction, I did identify two rotten tests:
* a minor one in `setStructInstNotation.lean`, where a comment says `Set
Nat`, but `#check` actually prints `?_`. Weird?
* `CompilerProbe.lean` is generating empty output, apparently indicating
that something is broken, but I don't know the signficance of this file.

In any case, I'll ask about these elsewhere.

(This started by noticing that a recent `grind` test file had an
untested `trace_state`, and then got carried away.)
2024-05-16 00:38:31 +00:00

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import Lean.Meta
open Lean
open Lean.Meta
universe u v w
abbrev M := ExceptT String MetaM
def testM {α} [BEq α] [ToString α] (x : M α) (expected : α) : MetaM Unit := do
let r ← x
match r with
| Except.ok a => unless a == expected do throwError m!"unexpected result {a}"
| Except.error e => throwError m!"FAILED: {e}"
@[noinline] def act1 : M Nat :=
throw <| Exception.error Syntax.missing "Error at act1"
def g1 : M Nat :=
tryCatchThe Exception
(tryCatchThe String act1 (fun ex => pure 100))
(fun ex => pure 200)
/-- info: -/
#guard_msgs in
#eval testM g1 200
@[noinline] def act2 : M Nat :=
throwThe String "hello world"
def g2 : M Nat :=
tryCatchThe Exception
(tryCatchThe String act2 (fun ex => pure 100))
(fun ex => pure 200)
/-- info: -/
#guard_msgs in
#eval testM g2 100
def h1 : CoreM Nat :=
pure 10
/-- info: 10 -/
#guard_msgs in
#eval h1
def h2 : MetaM Nat :=
pure 20
/-- info: 20 -/
#guard_msgs in
#eval h2