test: Add test witnessing #283

Author: alt-romes

test/golden/T283/T283.cabal

@@ -0,0 +1,18 @@
+cabal-version:   3.16
+name:            T283
+version:         0.1.0.0
+license:         NONE
+author:          Rodrigo Mesquita
+maintainer:      rodrigo.m.mesquita@gmail.com
+build-type:      Simple
+extra-doc-files: CHANGELOG.md
+
+common warnings
+    ghc-options: -Wall
+
+executable T283
+    import:           warnings
+    main-is:          Main.hs
+    build-depends:    base
+    hs-source-dirs:   app
+    default-language: Haskell2010

test/golden/T283/T283.ghc-914.hdb-stdout

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+[1 of 3] Compiling GHC.Debugger.View.Class ( in-memory:GHC.Debugger.View.Class, interpreted )[haskell-debugger-view-in-memory]
+[2 of 3] Compiling Main             ( <TEMPORARY-DIRECTORY>/app/Main.hs, interpreted )[T283-0.1.0.0-inplace-T283]
+(hdb) 
+(hdb) THIS IS A PACKAGE
+()
+(hdb) Aborted: <interactive>:1:1: error: [GHC-35235]
+    Could not find module `Main'.
+    It is not a module in the current program, or in any known package.
+(hdb) "If an older version of T283 was installed, we'd now shadow the home-unit Main with the outdated installed Main!"
+(hdb) Exiting...

test/golden/T283/T283.hdb-stdin

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+p import Main
+p main
+p import "T283" Main
+p "If an older version of T283 was installed, we'd now shadow the home-unit Main with the outdated installed Main!"

test/golden/T283/T283.hdb-test

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+#!/bin/sh
+
+# Witnesses that package-qualified imports bypass home units (#283)
+$HDB -v0 app/Main.hs 2>&1 < T283.hdb-stdin

test/golden/T283/app/Main.hs

@@ -0,0 +1,4 @@
+module Main (main) where
+
+main :: IO ()
+main = putStrLn "THIS IS A PACKAGE"