More features: have a seperate setup script, where global variable replacements can be placed, new commandline parameters, command window, better recording, chose click type, ...

docker/Dockerfile

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+FROM ubuntu:latest
+MAINTAINER "Marc Wäckerlin"
+
+RUN apt-get install -y wget software-properties-common apt-transport-https
+RUN apt-add-repository https://dev.marc.waeckerlin.org/repository
+RUN wget -O- https://dev.marc.waeckerlin.org/repository/PublicKey | apt-key add -
+RUN apt-get update -y
+RUN apt-get install -y xvfb webtester
+
+ADD runtests.sh runtests.sh
+
+VOLUME /tests
+
+WORKDIR /tests
+CMD /runtests.sh

docker/runtests.sh

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+#!/bin/bash -e
+
+if test -z "${WEBRUNNER_SCRIPTS}"; then
+    echo '*** ERROR: set at least -e WEBRUNNER_SCRIPTS="testfile.wt ..."'
+    echo "    optional variables: XVFB_SERVER_ARGS, WEBRUNNER_ARGS"
+    exit 1
+fi
+
+xvfb-run -a --server-args="${XVFB_SERVER_ARGS:--screen 0 2048x2048x24}" \
+    webrunner ${WEBRUNNER_ARGS:--W 2048 -H 2048 -sx testoutput.xml} \
+              ${WEBRUNNER_SCRIPTS}