Add wasm CI

Author: nhooyr

.github/workflows/ci.yml

@@ -4,27 +4,35 @@ on: [push]
 jobs:
   fmt:
     runs-on: ubuntu-latest
-    container: docker://nhooyr/websocket-ci@sha256:549cc2716fd1ff08608b39a52af95a67bf9f490f6f31933cccd94e750985e2dc
+    container: docker://nhooyr/websocket-ci@sha256:402c8c50cf3bf31561701921ef1b83e3e76f84a8e6efb9864bb92b87ffaf1ac8
     steps:
       - uses: actions/checkout@v1
         with:
           fetch-depth: 1
       - run: ./ci/fmt.sh
   lint:
     runs-on: ubuntu-latest
-    container: docker://nhooyr/websocket-ci@sha256:549cc2716fd1ff08608b39a52af95a67bf9f490f6f31933cccd94e750985e2dc
+    container: docker://nhooyr/websocket-ci@sha256:402c8c50cf3bf31561701921ef1b83e3e76f84a8e6efb9864bb92b87ffaf1ac8
     steps:
       - uses: actions/checkout@v1
         with:
           fetch-depth: 1
       - run: ./ci/lint.sh
   test:
     runs-on: ubuntu-latest
-    container: docker://nhooyr/websocket-ci@sha256:549cc2716fd1ff08608b39a52af95a67bf9f490f6f31933cccd94e750985e2dc
+    container: docker://nhooyr/websocket-ci@sha256:402c8c50cf3bf31561701921ef1b83e3e76f84a8e6efb9864bb92b87ffaf1ac8
     steps:
       - uses: actions/checkout@v1
         with:
           fetch-depth: 1
       - run: ./ci/test.sh
         env:
           CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
+  wasm:
+    runs-on: ubuntu-latest
+    container: docker://nhooyr/websocket-ci@sha256:402c8c50cf3bf31561701921ef1b83e3e76f84a8e6efb9864bb92b87ffaf1ac8
+    steps:
+      - uses: actions/checkout@v1
+        with:
+          fetch-depth: 1
+      - run: ./ci/wasm.sh

ci/image/Dockerfile

@@ -2,14 +2,20 @@ FROM golang:1
 
 ENV DEBIAN_FRONTEND=noninteractive
 ENV GOPATH=/root/gopath
+ENV PATH=$GOPATH/bin:$PATH
 ENV GOFLAGS="-mod=readonly"
 ENV PAGER=cat
 ENV CI=true
 
 RUN apt-get update && \
-  apt-get install -y shellcheck npm && \
+  apt-get install -y shellcheck npm chromium && \
   npm install -g prettier
 
+# https://github.com/golang/go/wiki/WebAssembly#running-tests-in-the-browser
+RUN go get github.com/agnivade/wasmbrowsertest && \
+  mv $GOPATH/bin/wasmbrowsertest $GOPATH/bin/go_js_wasm_exec
+
+
 RUN git config --global color.ui always
 
 # Cache go modules.

ci/wasm.sh

@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+cd "$(dirname "${0}")"
+cd "$(git rev-parse --show-toplevel)"
+
+GOOS=js GOARCH=wasm go vet ./...
+go install golang.org/x/lint/golint
+GOOS=JS GOARCH=wasm golint -set_exit_status ./...
+GOOS=js GOARCH=wasm go test ./internal/websocketjs

internal/websocketjs/websocketjs.go renamed to internal/wsjs/wsjs.go

@@ -2,7 +2,7 @@
 
 // websocketjs implements typed access to the browser javascript WebSocket API.
 // https://developer.mozilla.org/en-US/docs/Web/API/WebSocket
-package websocketjs
+package wsjs
 
 import (
 	"context"
@@ -101,8 +101,14 @@ type MessageEvent struct {
 
 func (c *WebSocket) OnMessage(fn func(m MessageEvent)) {
 	c.addEventListener("message", func(e js.Value) {
+		var data []byte
+
 		arrayBuffer := e.Get("data")
-		data := extractArrayBuffer(arrayBuffer)
+		if arrayBuffer.Type() == js.TypeString {
+			data = []byte(arrayBuffer.String())
+		} else {
+			data = extractArrayBuffer(arrayBuffer)
+		}
 
 		me := MessageEvent{
 			Data: data,

internal/websocketjs/websocketjs_test.go renamed to internal/wsjs/wsjs_test.go

@@ -1,6 +1,6 @@
 // +build js
 
-package websocketjs
+package wsjs
 
 import (
 	"context"