How to do WASM Unit tests with function defined in Index.html?

Multiplatform
1

Hello,

I created a simple function in my index.html that is called in my feature.wasm.kt as an external function.

external fun myFunction(text: String): JSArray<JsString> in Kotlin

and in index.html

<script>
  function myFunction(text) { doSomething() }
</script>

The function works when testing manually in browser. But Unit tests fail with the error:
kotlin.js.JsException: myFunction is not defined

I tried to add Karma in my gradle, and call tests from the wasmJsBrowserTest gradle task, but still get the error.

wasmJs {
    browser {
        testTask {
            useKarma {
                useChromeHeadless()
            }
        }
    }
    binaries.executable()
}

I’m trying to piece together how Karma should be configured to include my files, but the only information I found is in the from the KMP/JS page Run tests in Kotlin/JS | Kotlin Documentation and doesn’t go into much details configuration.