Add tests.

cabal-testsuite/PackageTests/CheckSetup/LICENSE

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+LICENSE

cabal-testsuite/PackageTests/CheckSetup/MyLibrary.hs

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+module MyLibrary () where

cabal-testsuite/PackageTests/CheckSetup/Setup.hs

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+import Distribution.Simple
+main = defaultMain

cabal-testsuite/PackageTests/CheckSetup/my.cabal

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+name: CheckSetup
+version: 0.1
+license: BSD3
+license-file: LICENSE
+author: Alexander Vershilov
+maintainer: Alexander Vershilov
+synopsis: Check setup
+category: PackageTests
+build-type: Custom
+cabal-version: 2.0
+
+description:
+    Check that Cabal recognizes problems with setup module.
+
+custom-setup
+  setup-depends:
+    base,
+    Cabal,
+    bytestring
+
+Library
+    default-language: Haskell2010
+    build-depends: base <5.0
+    exposed-modules:
+        MyLibrary

cabal-testsuite/PackageTests/CheckSetup/setup.test.hs

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+import Test.Cabal.Prelude
+
+-- Test that setup shows all the 'autogen-modules' warnings.
+main = setupAndCabalTest $ do
+
+        checkResult <- fails $ cabal_raw' ["check"]
+
+        -- Package check messages.
+        let libWarning=
+              "The dependency 'build-depends: 'bytestring' does not "
+              ++ "specify an upper bound on the version number."
+            libError1 =
+              "The dependency 'setup-depends: 'Cabal' does not specify "
+              ++ "an upper bound on the version number"
+            libError2 =
+              "The dependency 'setup-depends: 'base' does not specify "
+              ++ "an upper bound on the version number"
+
+        -- Asserts for the desired check messages after configure.
+        assertOutputContains libWarning checkResult
+        assertOutputContains libError1 checkResult
+        assertOutputContains libError2 checkResult
+
+        return ()