lean4-htt/tests/elab/library_search_all.lean
Garmelon 08eb78a5b2
chore: switch to new test/bench suite (#12590)
This PR sets up the new integrated test/bench suite. It then migrates
all benchmarks and some related tests to the new suite. There's also
some documentation and some linting.

For now, a lot of the old tests are left alone so this PR doesn't become
even larger than it already is. Eventually, all tests should be migrated
to the new suite though so there isn't a confusing mix of two systems.
2026-02-25 13:51:53 +00:00

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/-!
# Tests for `exact? +all`
This tests the `+all` option which collects all successful lemmas
instead of stopping at the first complete solution.
-/
set_option linter.unusedVariables false
-- Create a custom inductive with limited lemmas for controlled testing
inductive MyTrue : Prop where
| intro
-- Define exactly three ways to prove MyTrue
theorem myTrue1 : MyTrue := MyTrue.intro
theorem myTrue2 : MyTrue := MyTrue.intro
theorem myTrue3 : MyTrue := MyTrue.intro
-- Test: without +all, we get a single suggestion and the goal is solved
/--
info: Try this:
[apply] exact myTrue3
-/
#guard_msgs in
example : MyTrue := by exact?
-- Test: with +all, exact? finds all lemmas (including the constructor)
-- The goal is admitted (sorry), and all suggestions are shown in one message
/--
info: Try these:
[apply] exact myTrue3
[apply] exact MyTrue.intro
[apply] exact myTrue1
[apply] exact myTrue2
---
warning: declaration uses `sorry`
-/
#guard_msgs in
example : MyTrue := by exact? +all
-- Test: apply? also supports +all
/--
info: Try these:
[apply] exact myTrue3
[apply] exact MyTrue.intro
[apply] exact myTrue1
[apply] exact myTrue2
---
warning: declaration uses `sorry`
-/
#guard_msgs in
example : MyTrue := by apply? +all
-- Test: verify that +all without any matches still errors appropriately
/--
error: `exact?` could not close the goal. Try `apply?` to see partial suggestions.
-/
#guard_msgs in
example (n : Nat) (h : n = n + 1) : False := by exact? +all
def Empty.elim2 := @Empty.elim
/--
info: Try these:
[apply] exact h.elim
[apply] exact h.elim2
---
warning: declaration uses `sorry`
-/
#guard_msgs in
example {α : Sort u} (h : Empty) : α := by exact? +all
/-- error: `exact?` could not close the goal. -/
#guard_msgs in
example {α : Sort u} (h : Empty) : α := by exact? +all -star