Trying to add `wasm` target to my project but tests keep fai kotlinlang #webassembly

Trying to add `wasm` target to my project but test...

Matt Nelson

03/02/2023, 1:08 AM

Trying to add

wasm

target to my project but tests keep failing with this cryptic error. It's a pure kotlin project. Anyone see this before or know what's happening?

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> Task :library:encoding-core:wasmBrowserTest

Error [ERR_REQUIRE_ESM]: require() of ES Module /home/administrator/Projects/personal/components/encoding/build/js/packages/encoding-encoding-core-wasm-test/kotlin/encoding-encoding-core-wasm-test.mjs not supported.
Instead change the require of /home/administrator/Projects/personal/components/encoding/build/js/packages/encoding-encoding-core-wasm-test/kotlin/encoding-encoding-core-wasm-test.mjs to a dynamic import() which is available in all CommonJS modules.
    at Object.<anonymous> (/home/administrator/Projects/personal/components/encoding/build/js/packages/encoding-encoding-core-wasm-test/adapter-nodejs.js:2:18)
    at async Promise.all (index 0)
    at async formattedImport (/home/administrator/Projects/personal/components/encoding/build/js/node_modules/mocha/lib/nodejs/esm-utils.js:7:14)
    at async Object.exports.requireOrImport (/home/administrator/Projects/personal/components/encoding/build/js/node_modules/mocha/lib/nodejs/esm-utils.js:38:28)
    at async Object.exports.loadFilesAsync (/home/administrator/Projects/personal/components/encoding/build/js/node_modules/mocha/lib/nodejs/esm-utils.js:91:20)
    at async singleRun (/home/administrator/Projects/personal/components/encoding/build/js/node_modules/mocha/lib/cli/run-helpers.js:125:3)
    at async Object.exports.handler (/home/administrator/Projects/personal/components/encoding/build/js/node_modules/mocha/lib/cli/run.js:370:5)

> Task :library:encoding-core:wasmD8Test FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':library:encoding-core:wasmD8Test'.
> command '/home/administrator/.gradle/d8/v8-linux64-rel-10.2.9/d8' exited with errors (exit code: 1)

Svyatoslav Kuzmich [JB]

03/02/2023, 6:57 AM

It looks like this test is trying to load

mocha

, a Node.js and browser testing library. But it runs in a

d8

a bare-bones V8 JS shell, where mocha is not supported. Lack of

require()

was the first error it encountered, but it probably will not be the only one. Usually, when running

wasmD8Test

, Kotlin/Wasm uses uses built-in test runner without Mocha. If you haven’t configured anything specifically around

d8

and

mocha

in your build, this error is not expected, and i would like to see more information about your build scripts to solve this problem.

Svyatoslav Kuzmich [JB]

03/02/2023, 7:25 AM

My initial guess is that it could be caused by having

useMocha

specified in a d8 testTask here: https://github.com/05nelsonm/gradle-kmp-configuration-plugin/blob/8f4d7b51b2e9303e[…]configuration/extension/container/target/TargetWasmContainer.kt

Matt Nelson

03/02/2023, 10:12 AM

Yup, that's the configuration I'm using. Expressing

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browser { testTask { useMocha { timeout = "30s" } } }
nodejs { testTask { useMocha { timeout = "30s" } } }
d8()

yielded the same error. Tried simply expressing

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browser()
nodejs()
d8()

and got this

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> Task :library:encoding-core:wasmBrowserTest
Module parse failed: The top-level-await experiment is not enabled (set experiments.topLevelAwait: true to enabled it)
You may need an appropriate loader to handle this file type, currently no loaders are configured to process this file. See <https://webpack.js.org/concepts#loaders>
Error: The top-level-await experiment is not enabled (set experiments.topLevelAwait: true to enabled it)
    at /home/administrator/Projects/personal/components/encoding/build/js/node_modules/webpack/lib/dependencies/HarmonyDetectionParserPlugin.js:54:11
    at Hook.eval [as call] (eval at create (/home/administrator/Projects/personal/components/encoding/build/js/node_modules/tapable/lib/HookCodeFactory.js:19:10), <anonymous>:7:16)
    at Hook.CALL_DELEGATE [as _call] (/home/administrator/Projects/personal/components/encoding/build/js/node_modules/tapable/lib/Hook.js:14:14)
    at JavascriptParser.walkAwaitExpression (/home/administrator/Projects/personal/components/encoding/build/js/node_modules/webpack/lib/javascript/JavascriptParser.js:2342:29)
    at JavascriptParser.walkExpression (/home/administrator/Projects/personal/components/encoding/build/js/node_modules/webpack/lib/javascript/JavascriptParser.js:2272:10)
    at JavascriptParser.walkVariableDeclaration (/home/administrator/Projects/personal/components/encoding/build/js/node_modules/webpack/lib/javascript/JavascriptParser.js:2126:33)
    at JavascriptParser.walkStatement (/home/administrator/Projects/personal/components/encoding/build/js/node_modules/webpack/lib/javascript/JavascriptParser.js:1620:10)
    at JavascriptParser.walkStatements (/home/administrator/Projects/personal/components/encoding/build/js/node_modules/webpack/lib/javascript/JavascriptParser.js:1481:9)
    at /home/administrator/Projects/personal/components/encoding/build/js/node_modules/webpack/lib/javascript/JavascriptParser.js:1655:9
    at JavascriptParser.inBlockScope (/home/administrator/Projects/personal/components/encoding/build/js/node_modules/webpack/lib/javascript/JavascriptParser.js:3113:3)
  Error: The top-level-await experiment is not enabled (set experiments.topLevelAwait: true to enabled it)
      at /home/administrator/Projects/personal/components/encoding/build/js/node_modules/webpack/lib/dependencies/HarmonyDetectionParserPlugin.js:54:11
      at Hook.eval [as call] (eval at create (/home/administrator/Projects/personal/components/encoding/build/js/node_modules/tapable/lib/HookCodeFactory.js:19:10), <anonymous>:7:16)
      at Hook.CALL_DELEGATE [as _call] (/home/administrator/Projects/personal/components/encoding/build/js/node_modules/tapable/lib/Hook.js:14:14)
      at JavascriptParser.walkAwaitExpression (/home/administrator/Projects/personal/components/encoding/build/js/node_modules/webpack/lib/javascript/JavascriptParser.js:2342:29)
      at JavascriptParser.walkExpression (/home/administrator/Projects/personal/components/encoding/build/js/node_modules/webpack/lib/javascript/JavascriptParser.js:2272:10)
      at JavascriptParser.walkVariableDeclaration (/home/administrator/Projects/personal/components/encoding/build/js/node_modules/webpack/lib/javascript/JavascriptParser.js:2126:33)
      at JavascriptParser.walkStatement (/home/administrator/Projects/personal/components/encoding/build/js/node_modules/webpack/lib/javascript/JavascriptParser.js:1620:10)
      at JavascriptParser.walkStatements (/home/administrator/Projects/personal/components/encoding/build/js/node_modules/webpack/lib/javascript/JavascriptParser.js:1481:9)
      at /home/administrator/Projects/personal/components/encoding/build/js/node_modules/webpack/lib/javascript/JavascriptParser.js:1655:9
      at JavascriptParser.inBlockScope (/home/administrator/Projects/personal/components/encoding/build/js/node_modules/webpack/lib/javascript/JavascriptParser.js:3113:3)
  at /tmp/_karma_webpack_399976/commons.js:95:1
  Error: The top-level-await experiment is not enabled (set experiments.topLevelAwait: true to enabled it)
      at /home/administrator/Projects/personal/components/encoding/build/js/node_modules/webpack/lib/dependencies/HarmonyDetectionParserPlugin.js:54:11
      at Hook.eval [as call] (eval at create (/home/administrator/Projects/personal/components/encoding/build/js/node_modules/tapable/lib/HookCodeFactory.js:19:10), <anonymous>:7:16)
      at Hook.CALL_DELEGATE [as _call] (/home/administrator/Projects/personal/components/encoding/build/js/node_modules/tapable/lib/Hook.js:14:14)
      at JavascriptParser.walkAwaitExpression (/home/administrator/Projects/personal/components/encoding/build/js/node_modules/webpack/lib/javascript/JavascriptParser.js:2342:29)
      at JavascriptParser.walkExpression (/home/administrator/Projects/personal/components/encoding/build/js/node_modules/webpack/lib/javascript/JavascriptParser.js:2272:10)
      at JavascriptParser.walkVariableDeclaration (/home/administrator/Projects/personal/components/encoding/build/js/node_modules/webpack/lib/javascript/JavascriptParser.js:2126:33)
      at JavascriptParser.walkStatement (/home/administrator/Projects/personal/components/encoding/build/js/node_modules/webpack/lib/javascript/JavascriptParser.js:1620:10)
      at JavascriptParser.walkStatements (/home/administrator/Projects/personal/components/encoding/build/js/node_modules/webpack/lib/javascript/JavascriptParser.js:1481:9)
      at /home/administrator/Projects/personal/components/encoding/build/js/node_modules/webpack/lib/javascript/JavascriptParser.js:1655:9
      at JavascriptParser.inBlockScope (/home/administrator/Projects/personal/components/encoding/build/js/node_modules/webpack/lib/javascript/JavascriptParser.js:3113:3)
      at ./kotlin/encoding-encoding-core-wasm-test.mjs (/tmp/_karma_webpack_399976/commons.js:95:7)
      at __webpack_require__ (/tmp/_karma_webpack_399976/runtime.js:23:41)
      at ./adapter-browser.js (/tmp/_karma_webpack_399976/commons.js:57:18)
      at __webpack_require__ (/tmp/_karma_webpack_399976/runtime.js:23:41)
      at __webpack_exec__ (adapter-browser.3388599486.js:4:48)
      at adapter-browser.3388599486.js:5:55
      at __webpack_require__.O (/tmp/_karma_webpack_399976/runtime.js:57:23)
      at adapter-browser.3388599486.js:6:56
      at webpackJsonpCallback (/tmp/_karma_webpack_399976/runtime.js:105:39)
      at adapter-browser.3388599486.js:2:117
java.lang.IllegalStateException: command '/home/administrator/.gradle/nodejs/node-v16.13.0-linux-x64/bin/node' exited with errors (exit code: 1)

> Task :library:encoding-core:wasmD8Test FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':library:encoding-core:wasmD8Test'.
> command '/home/administrator/.gradle/d8/v8-linux64-rel-10.2.9/d8' exited with errors (exit code: 1)

Svyatoslav Kuzmich [JB]

03/02/2023, 10:32 AM

Browser tests don’t work, yet unfortunately because of https://youtrack.jetbrains.com/issue/KT-56159 . Fixed in upcoming 1.9.0 Current stable node version has V8 that is too old. Possible workaround is adding:

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plugins.withType<org.jetbrains.kotlin.gradle.targets.js.nodejs.NodeJsRootPlugin>().configureEach {
 extensions.configure<org.jetbrains.kotlin.gradle.targets.js.nodejs.NodeJsRootExtension> {
        nodeDownloadBaseUrl = "<https://nodejs.org/download/v8-canary>"
        nodeVersion = "20.0.0-v8-canary2022112061c569ba0d"
    }
}

tasks.withType<org.jetbrains.kotlin.gradle.targets.js.npm.tasks.KotlinNpmInstallTask>().configureEach {
    args.add("--ignore-engines")
}

But it would apply this version to the whole project, including K/JS

Svyatoslav Kuzmich [JB]

03/02/2023, 10:39 AM

D8 seems to be crashing with unknown issue. Unfortunately gradle doesn’t report error messages when it is crashed (as opposed to just failing the test with exception). Running

./gradlew :library:encoding-core:wasmD8Test --info

should show the

d8

command to run it manually. I would be happy to look at it if you can share a code that reproduces the problem.

Matt Nelson

03/02/2023, 11:46 AM

Definitely. Lemme get this merged and will create a separate branch for an issue ticket to enable wasm which will reproduce the issue!

Matt Nelson

03/02/2023, 12:47 PM

kk. Reproducing the issue HERE for branch

issue/97-enable-wasm

Svyatoslav Kuzmich [JB]

03/02/2023, 1:27 PM

A bunch of Kotlin/Wasm things got fixed in Kotlin 1.8.20-Beta. It seems that you are using older version. I wanted to test it with new version, but I couldn’t find where is should be specified.

Matt Nelson

03/02/2023, 1:28 PM

gradle/libs.versions.toml

Svyatoslav Kuzmich [JB]

03/02/2023, 1:39 PM

Updating to 1.8.20-Beta seems to break some K/Native build scripts. But

:library:encoding-core:wasmD8Test

now passes all tests!

Matt Nelson

03/02/2023, 1:41 PM

Yeah I'm getting some weird errors when updating to

1.8.20-Beta

with the

js

target showing that

testTask

function is not found

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Unable to find method ''void org.jetbrains.kotlin.gradle.targets.js.dsl.KotlinJsBrowserDsl.testTask(kotlin.jvm.functions.Function1)''

Matt Nelson

03/02/2023, 1:52 PM

But yes, the

wasmD8Test

run passes. Looks like I'll wait for

1.8.20

release to enable support for it. Thanks!

Svyatoslav Kuzmich [JB]

03/02/2023, 1:56 PM

D8 should be enough for testing pure Kotlin code. Node and browser currently require a non-standard run config until corresponding issues are resolved.

Matt Nelson

03/02/2023, 2:06 PM

So how would all that work then if I only express

d8

when someone depends on this library where they express

browser

and

nodejs

for their

wasm

target? I know the

js

target if you only express

nodejs

and someone depending on the library has

browser

and

nodejs

expressed, there is a compatibility error b/c of metadata incompatibility.

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{
      "target": "org.jetbrains.kotlin.gradle.targets.js.KotlinJsTarget",
      "platformType": "js",
      "extras": {
        "js": {
          "isBrowserConfigured": true,
          "isNodejsConfigured": true
        }
      }
    },

Matt Nelson

03/02/2023, 2:22 PM

Looks like my issue https://kotlinlang.slack.com/archives/CDFP59223/p1677764499958009?thread_ts=1677719319.407739&cid=CDFP59223 was caused by an API breaking change in the following commit. https://github.com/JetBrains/kotlin/commit/e19776bd5ad4f7089266e277785955ff5c728864#diff-a6d8db54434ea22192f9aec82[…]82c8f4c58fab7581c58d9f2bddda340

Svyatoslav Kuzmich [JB]

03/02/2023, 2:24 PM

Good question regarding metadata. I don’t know the answer yet, I’ll ask around.

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