ghcmod "Could not load module" for test file

[freeman42x]

Getting the following ghcmod error message in the test file:

Could not load module ‘Hedgehog.Range’
It is a member of the hidden package ‘hedgehog-0.6.1’.
Perhaps you need to add ‘hedgehog’ to the build-depends in your .cabal file.
Use -v to see a list of the files searched for.

If I open a Lib file HIE works fine without any errors.

Using GHC 8.6.4
Issue can be reproduced both with Atom and VSCode

To reproduce you can git clone this project: https://github.com/fairy-tale-agi-solutions/fairy-tale-artificial-general-intelligence-solutions/tree/master/Sources/Razvan%20Flavius%20Panda/Haskell/artificial-general-intelligence

At SHA: 758129122541c2f2f0a4f19a1e70e413543fa72e

And open the test/Spec.hs file to see the issue.

[freeman42x]

For now I used the workaround of adding the test packages to the library part of the cabal file also:

• hedgehog
• hedgehog-fn

ghcmod sees the modules then and HIE works.

[willisplummer]

I'm running into something I think is similar on a stack project --

File:     ./test/GetMaxFromMapSpec.hs
Range:    4:7-4:17
Source:   not found
Severity: DsError
Message: 
  Could not find module ‘Test.Hspec’
  It is not a module in the current program, or in any known package.

here's my package yaml:

name:                friendface
version:             0.1.0.0
github:              "githubuser/friendface"
license:             BSD3
author:              "Author name here"
maintainer:          "example@example.com"
copyright:           "2019 Author name here"

extra-source-files:
- README.md
- ChangeLog.md

# Metadata used when publishing your package
# synopsis:            Short description of your package
# category:            Web

# To avoid duplicated efforts in documentation and dealing with the
# complications of embedding Haddock markup inside cabal files, it is
# common to point users to the README.md file.
description:         Please see the README on GitHub at <https://github.com/githubuser/friendface#readme>

dependencies:
- aeson
- base >= 4.7 && < 5
- bytestring
- cassava
- containers
- servant
- servant-server
- text
- time
- vector
- wai
- warp

library:
  source-dirs: src

executables:
  friendface-exe:
    main:                Main.hs
    source-dirs:         app
    ghc-options:
    - -threaded
    - -rtsopts
    - -with-rtsopts=-N
    dependencies:
    - friendface

tests:
  friendface-test:
    defaults: hspec/hspec@master
    # main:                Spec.hs
    # source-dirs:         test
    # ghc-options:
    # - -threaded
    # - -rtsopts
    # - -with-rtsopts=-N
    dependencies:
    - friendface

[jneira]

I am experiencing it open haskell-ide-engine itself (stack based) with vscode in windows 10:

{
	"resource": "/D:/dev/ws/haskell/haskell-ide-engine/test/functional/FunctionalCodeActionsSpec.hs",
	"owner": "Haskell HIE (haskell-ide-engine)",
	"severity": 8,
	"message": "Could not load module `Control.Applicative.Combinators'\nIt is a member of the hidden package `parser-combinators-1.1.0'.\nPerhaps you need to add `parser-combinators' to the build-depends in your .cabal file.\nUse -v to see a list of the files searched for.",
	"source": "ghcmod",
	"startLineNumber": 11,
	"startColumn": 1,
	"endLineNumber": 11,
	"endColumn": 49
}

and 4 more similar errors

[fendor]

Should be resolved now. For different components, having different dependencies works. Resolved by #1126