Add test for haskell#7423

ffaf1 · ffaf1 · commit b54ee9ffb556 · 2022-08-27T14:00:19.000+02:00
i.e. Do not warn on -O2 if flag conditional
diff --git a/cabal-testsuite/PackageTests/Check/ConfiguredPackage/GHCOptions/NoWarnFlag/cabal.out b/cabal-testsuite/PackageTests/Check/ConfiguredPackage/GHCOptions/NoWarnFlag/cabal.out
@@ -0,0 +1,2 @@
+# cabal check
+No errors or warnings could be found in the package.
diff --git a/cabal-testsuite/PackageTests/Check/ConfiguredPackage/GHCOptions/NoWarnFlag/cabal.test.hs b/cabal-testsuite/PackageTests/Check/ConfiguredPackage/GHCOptions/NoWarnFlag/cabal.test.hs
@@ -0,0 +1,4 @@
+import Test.Cabal.Prelude
+
+-- Do not output warning when an -O2 is behind a cabal flag.
+main = cabalTest $ cabal "check" []
diff --git a/cabal-testsuite/PackageTests/Check/ConfiguredPackage/GHCOptions/NoWarnFlag/pkg.cabal b/cabal-testsuite/PackageTests/Check/ConfiguredPackage/GHCOptions/NoWarnFlag/pkg.cabal
@@ -0,0 +1,18 @@
+cabal-version: 2.2
+name: pkg
+version: 0
+category: example
+maintainer: none@example.com
+synopsis: synopsys
+description: description
+license: GPL-3.0-or-later
+
+flag force-O2
+  default: False
+  manual: True
+
+library
+  exposed-modules:      Foo
+  default-language:     Haskell2010
+  if flag(force-O2)
+    ghc-options:        -O2

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	`+# cabal check`
	`2`	`+No errors or warnings could be found in the package.`