Pantograph/Test/Tactic/Assign.lean

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import Lean.Meta
import Lean.Elab
import LSpec
import Test.Common
open Lean
namespace Pantograph.Test.Tactic.Assign
def test_draft : TestT Elab.TermElabM Unit := do
let expr := "forall (p : Prop), (p p) p"
let skeleton := "by\nhave a : p p := sorry\nsorry"
let expr ← parseSentence expr
Meta.forallTelescope expr $ λ _ body => do
let skeleton' ← match Parser.runParserCategory
(env := ← MonadEnv.getEnv)
(catName := `term)
(input := skeleton)
(fileName := ← getFileName) with
| .ok syn => pure syn
| .error error => throwError "Failed to parse: {error}"
-- Apply the tactic
let target ← Meta.mkFreshExprSyntheticOpaqueMVar body
let tactic := Tactic.evalDraft skeleton'
let newGoals ← runTacticOnMVar tactic target.mvarId!
addTest $ LSpec.check "goals" ((← newGoals.mapM (λ g => do exprToStr (← g.getType))) = ["p p", "(p p) p"])
def suite (env: Environment): List (String × IO LSpec.TestSeq) :=
[
("draft", test_draft),
] |>.map (λ (name, t) => (name, runTestTermElabM env t))
end Pantograph.Test.Tactic.Assign