"MODULE NOT FOUND" error for test-dependencies

[robyoder]

Expected Behavior

I have elm-explorations/test in my test-dependencies in elm.json. That should be sufficient for my test files to be able to import modules from that package without errors.

Current Behavior

The following errors show up in the Problems pane in VS Code (although compiling and running elm-test work just fine):

MODULE NOT FOUND - You are trying to import a `Expect` module:

3| import Expect
          #^^^^^^#
I checked the "dependencies" and "source-directories" listed in your elm.json,
but I cannot find it! Maybe it is a typo for one of these names?

#    Dict
    Set
    Array
    Html#

#Hint#: If it is not a typo, check the "dependencies" and "source-directories" of
your elm.json to make sure all the packages you need are listed there!

MODULE NOT FOUND - You are trying to import a `Test` module:

5| import Test exposing (Test, describe, test)
          #^^^^#
I checked the "dependencies" and "source-directories" listed in your elm.json,
but I cannot find it! Maybe it is a typo for one of these names?

#    Set
    Task
    Dict
    Html#

#Hint#: If it is not a typo, check the "dependencies" and "source-directories" of
your elm.json to make sure all the packages you need are listed there!

Steps to Reproduce

I have the following elm.json:

{
    "type": "application",
    "source-directories": [
        "client/src",
        "client/tests"
    ],
    "elm-version": "0.19.1",
    "dependencies": {
        "direct": {
            "NoRedInk/elm-json-decode-pipeline": "1.0.0",
            "elm/browser": "1.0.1",
            "elm/core": "1.0.2",
            "elm/html": "1.0.0",
            "elm/http": "2.0.0",
            "elm/json": "1.1.3",
            "elm/url": "1.0.0",
            "elm-community/dict-extra": "2.4.0",
            "elm-community/json-extra": "4.0.0"
        },
        "indirect": {
            "elm/bytes": "1.0.8",
            "elm/file": "1.0.5",
            "elm/parser": "1.1.0",
            "elm/time": "1.0.0",
            "elm/virtual-dom": "1.0.2",
            "rtfeldman/elm-iso8601-date-strings": "1.1.2"
        }
    },
    "test-dependencies": {
        "direct": {
            "elm-explorations/test": "1.2.2"
        },
        "indirect": {
            "elm/random": "1.0.0"
        }
    }
}

As you can see from source-directories, the file structure is

client
    src
        [main app files]
    tests
        SortTests.elm

It's inside SortTests.elm that this error appears (and other files in that directory). I can get rid of the error by moving elm-explorations/test and elm/random into the corresponding fields under dependencies instead of under test-dependencies.

Your Environment

• Version used: 0.10.2
• Editor name and version: VS Code 1.45.1
• Environment name and version: node.js 10.16.0
• Operating System and version: macOS 10.15.4

[razzeee]

Can you manage to get the same error with https://github.com/rtfeldman/elm-spa-example ? Do you need to make changes for it to error for you, or does it error out of the box?

[razzeee]

Closing due to no reply.

[witoldsz]

I am having similar problems: the project compiles and tests just fine, but the plugin complains:

Could not find a module to import named `Expect` in `dependencies` or `source-directories`.
Could not find a module to import named `Test` in `dependencies` or `source-directories`.

The "blue bulb" asks me if I want to install elm-explorations/test and when I do so, the message pops up:

I found it in your elm.json file, but in the "test-dependencies" field. 
Should I move it into "dependencies" for more general use?

Source: Elm (Extenstion)    [Yes]  [No]

The directory contains both TypeScript files (in ./src and ./test) and Elm (in ./elm and ./test/elm).

I have tried the elm-spa-example and it works fine, however it's strange that there are additional elm-package.json. I don't know what's that file there for?

[witoldsz]

OK, now I can see the problem. This plugin expects the tests to be in tests directory and I have them in test. Oh, too bad the #139 is not ready yet.

It looks my colleague who was coding the code I am working with right now, he was using Intellij Idea plugin, because I can see the elm.intellij.json file:

{
  "test-directory": "test/elm"
}

[abury]

I'm having the same issue, would love to know if there is a work around. The project I'm working on has the test file alongside the regular file with the Testsuffix.

[razzeee]

No, there is no work around, test detection needs to be implemented, which should be a bit more straight forward since the latest version.