Test cabal.project with source repo

test/cabal-source-repo/Main.hs

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

test/cabal-source-repo/cabal.project

@@ -0,0 +1,8 @@
+packages:
+  ./
+
+source-repository-package
+  type: git
+  location: https://github.com/input-output-hk/haskell.nix.git
+  tag: bc01ebc05a8105035c9449943046b46c8364b932
+  subdir: test/cabal-simple

test/cabal-source-repo/default.nix

@@ -0,0 +1,33 @@
+{ stdenv, mkCabalProjectPkgSet, callCabalProjectToNix }:
+
+with stdenv.lib;
+
+let
+  pkgSet = mkCabalProjectPkgSet {
+    plan-pkgs = import (callCabalProjectToNix {
+      index-state = "2019-04-30T00:00:00Z";
+      # reuse the cabal-simple test project
+      src = ./.;
+    });
+  };
+  packages = pkgSet.config.hsPkgs;
+in
+  stdenv.mkDerivation {
+    name = "call-cabal-project-to-nix-test";
+
+    buildCommand = ''
+      exe="${packages.use-cabal-simple.components.exes.use-cabal-simple}/bin/use-cabal-simple"
+
+      printf "checking whether executable runs... " >& 2
+      $exe
+
+      touch $out
+    '';
+
+    meta.platforms = platforms.all;
+
+    passthru = {
+      # Attributes used for debugging with nix repl
+      inherit pkgSet packages;
+    };
+  }

test/cabal-source-repo/use-cabal-simple.cabal

@@ -0,0 +1,26 @@
+cabal-version:       >=1.10
+-- Initial package description 'cabal-simple.cabal' generated by 'cabal
+-- init'.  For further documentation, see
+-- http://haskell.org/cabal/users-guide/
+
+name:                use-cabal-simple
+version:             0.1.0.0
+-- synopsis:
+-- description:
+-- bug-reports:
+license:             PublicDomain
+author:              Rodney Lorrimar
+maintainer:          rodney.lorrimar@iohk.io
+-- category:
+build-type:          Simple
+
+executable use-cabal-simple
+  main-is:             Main.hs
+  -- other-modules:
+  -- other-extensions:
+  build-depends:       base
+                     , cabal-simple
+                     , extra
+                     , optparse-applicative
+  -- hs-source-dirs:
+  default-language:    Haskell2010

test/default.nix

@@ -20,6 +20,7 @@ in {
   shell-for = haskell.callPackage ./shell-for {};
   callStackToNix = haskell.callPackage ./callStackToNix {};
   callCabalProjectToNix = haskell.callPackage ./call-cabal-project-to-nix {};
+  cabal-source-repo = haskell.callPackage ./cabal-source-repo {};
 
   # Run unit tests with: nix-instantiate --eval --strict -A unit
   # An empty list means success.