add test for cabal/config

Author: zlonast

cabal-testsuite/PackageTests/ConfigFile/InitSectionFieldsBools/cabal.out

@@ -0,0 +1,2 @@
+# cabal user-config
+Writing default configuration to <ROOT>/cabal.dist/cabal-config

cabal-testsuite/PackageTests/ConfigFile/InitSectionFieldsBools/cabal.test.hs

@@ -0,0 +1,18 @@
+import Test.Cabal.Prelude
+import Data.List (isInfixOf, groupBy)
+import Data.Function (on)
+
+main = cabalTest $ do
+  workdir <- fmap testWorkDir getTestEnv
+  let conf = workdir </> "cabal-config"
+
+  cabalG ["--config-file", conf] "user-config" ["init"]
+  confContents <- liftIO $ readFile conf
+
+  let ls = lines confContents
+      sections = groupBy ((==) `on` (== "")) ls
+      [initLs] = filter ((== "-- full-version: False") . head) sections
+      init = unlines initLs
+
+  assertBool "init section of config should contain debug-info: 0" ("debug-info: 0" `isInfixOf` init)
+  assertBool "init section of config should contain optimization: 1" ("optimization: 1" `isInfixOf` init)

cabal-testsuite/PackageTests/ProjectConfig/FlagsBools/cabal.project

@@ -2,6 +2,7 @@ packages: .
 
 build-info: true
 optimization: tRuE
+debug-info: fALSe
 
 package test
   flags: -bar

changelog.d/11937.md

@@ -5,6 +5,6 @@ prs: 11937
 ---
 
 The rendering of certain boolean‑like flags has been changed to use numeric levels:
-- For the `-O` (optimisation) flag, `True` or an unspecified value now renders as `-O1`, while `False` renders as `-O0`.
-- For the `-g` (debug info) flag, `True` or an unspecified value now renders `-g2`, while `False` renders as `-g0`.
+- For the `-O` (optimisation) flag, `True` or an unspecified value now renders as `1`, while `False` renders as `0`.
+- For the `-g` (debug info) flag, `True` or an unspecified value now renders `2`, while `False` renders as `0`.
 This makes the displayed compiler flags more consistent with their internal semantics (e.g. optimisation level 1 is the default).