Fix #1030: test case

When building with Cabal-3.6.*, Hackage server will accept the latest
GHC LANGUAGE extensions (new in GHC 9.2).

Author: andreasabel

tests/PackageTestMain.hs

@@ -63,9 +63,12 @@ badDirMangler entry =
 
 cabalPackageCheckTests :: [TestTree]
 cabalPackageCheckTests =
+  -- Failing tests
     [ testCase "Missing ./configure script" missingConfigureScriptTest
-    , testCase "Missing directories in tar file" missingDirsInTarFileTest
     , testCase "Bad spec-version" badSpecVer
+  -- Successful tests
+    , testCase "Missing directories in tar file" missingDirsInTarFileTest
+    , testCase "Accept GHC 9.2 LANGUAGE extensions" acceptGHC902LanguageExtensions
     ]
 
 ---------------------------------------------------------------------------
@@ -109,6 +112,11 @@ missingDirsInTarFileTest =
   where
   pkg = "correct-package-0.1.0.0"
 
+-- | Hackage should accept GHC 9.2 language extensions (issue #1030).
+
+acceptGHC902LanguageExtensions :: Assertion
+acceptGHC902LanguageExtensions = successTest "LANGUAGE-GHC-9.2"
+
 ---------------------------------------------------------------------------
 -- * Auxiliary functions to construct tests
 

tests/unpack-checks/LANGUAGE-GHC-9.2/LANGUAGE-GHC.cabal

@@ -0,0 +1,20 @@
+name:                LANGUAGE-GHC
+version:             9.2
+synopsis:            Test for LANGUAGE extensions (issue #1030)
+description:         Test whether Hackage accepts the latest LANGUAGE extensions
+license:             BSD3
+license-file:        LICENSE
+author:              Hackage Server Team
+maintainer:          [email protected]
+category:            Test case
+build-type:          Simple
+cabal-version:       >=1.10
+
+executable foo
+  main-is:             Main.hs
+  build-depends:       base >=4.16 && <4.17
+  default-language:    GHC2021
+  default-extensions:
+    -- These LANGUAGE extensions are new in GHC 9.2:
+    NoFieldSelectors
+    OverloadedRecordDot

tests/unpack-checks/LANGUAGE-GHC-9.2/LICENSE

@@ -0,0 +1,30 @@
+Copyright (c) 2016, Hackage Server Team
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+
+    * Neither the name of Hackage Server Team nor the names of other
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

tests/unpack-checks/LANGUAGE-GHC-9.2/Main.hs

@@ -0,0 +1,4 @@
+module Main where
+
+main :: IO ()
+main = putStrLn "Hello, Haskell!"

tests/unpack-checks/LANGUAGE-GHC-9.2/Setup.hs

@@ -0,0 +1,2 @@
+import Distribution.Simple
+main = defaultMain