use docker to get js coverage (travis fails to run wasm tests on its …

…own)

.travis.sh

@@ -11,8 +11,7 @@ script() {
         # add js coverage
         if [ "$TRAVIS_OS_NAME" == "linux" ];
         then
-            export PATH="$PATH:$(go env GOROOT)/misc/wasm"
-            GOOS=js GOARCH=wasm go test -covermode=count -coverprofile=profile.cov
+            bash js.cover.sh
             $HOME/gopath/bin/goveralls -coverprofile=profile.cov -service=travis-ci -repotoken $COVERALLS_TOKEN
         fi
     fi

js.cover.dockerfile

@@ -0,0 +1,9 @@
+FROM golang:1.11
+
+RUN curl -sL https://deb.nodesource.com/setup_8.x | bash
+RUN apt-get install --yes nodejs
+
+WORKDIR /go/src/github.com/djherbis/times
+COPY . .
+
+RUN GOOS=js GOARCH=wasm go test -covermode=count -coverprofile=profile.cov -exec="$(go env GOROOT)/misc/wasm/go_js_wasm_exec"

js.cover.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+set -e
+
+docker build -f js.cover.dockerfile -t js.cover.djherbis.times .
+docker create --name js.cover.djherbis.times js.cover.djherbis.times
+docker cp js.cover.djherbis.times:/go/src/github.com/djherbis/times/profile.cov .
+docker rm -v js.cover.djherbis.times