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Add regression test for #420 #422

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Add regression test for #420 #422

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15 changes: 15 additions & 0 deletions tests/Regressions.hs
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,7 @@ module Regressions (tests) where

import Control.Exception (evaluate)
import Control.Monad (replicateM)
import Data.Bits (shiftL)
import Data.Hashable (Hashable (..))
import Data.List (delete)
import Data.Maybe (isJust, isNothing)
Expand All @@ -24,6 +25,7 @@ import Test.Tasty.QuickCheck (testProperty)

import qualified Data.HashMap.Lazy as HML
import qualified Data.HashMap.Strict as HMS
import qualified Data.HashSet as HS

#if MIN_VERSION_base(4,12,0)
-- nothunks requires base >= 4.12
Expand Down Expand Up @@ -248,6 +250,18 @@ issue383 = do

#endif

------------------------------------------------------------------------
-- Issue #420

issue420 :: Assertion
issue420 = do
let k1 :: Int = 1 `shiftL` 10
let k2 :: Int = 2 `shiftL` 10
let s0 = HS.fromList [k1, k2]
let s1 = s0 `HS.intersection` s0
assert $ k1 `HS.member` s1
assert $ k2 `HS.member` s1

------------------------------------------------------------------------
-- * Test list

Expand Down Expand Up @@ -277,4 +291,5 @@ tests = testGroup "Regression tests"
#ifdef HAVE_NOTHUNKS
, testCase "issue383" issue383
#endif
, testCase "issue420" issue420
]