Run tests in a separate container.

test/image/Dockerfile

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+FROM weaveworks/weave-build
+COPY test.sh /
+ENTRYPOINT ["sh", "/test.sh"]

test/image/test.sh

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+#!/bin/sh
+set -e
+
+GOPATH=/home/go
+export GOPATH
+
+WEAVE_SRC=$GOPATH/src/github.com/weaveworks/weave
+
+# Expect that the weave repo will be bind-mounted into $GOPATH
+if ! [ -e $WEAVE_SRC ] ; then
+    cat 2>&1 <<EOF
+Nothing at ${WEAVE_SRC}.  Please
+bind-mount the golang workspace containing weave with the
+docker run -v option, e.g.:
+
+$ docker run -v <host gopath>:${GOPATH} \\
+      weaveworks/weave-test
+EOF
+    exit 1
+fi
+
+# If we run make directly, any files created on the bind mount
+# will have awkward ownership.  So we switch to a user with the
+# same user and group IDs as source directory.  We have to set a
+# few things up so that sudo works without complaining later on.
+uid=$(stat --format="%u" $WEAVE_SRC)
+gid=$(stat --format="%g" $WEAVE_SRC)
+echo "weave:x:$uid:$gid::$WEAVE_SRC:/bin/sh" >>/etc/passwd
+echo "weave:*:::::::" >>/etc/shadow
+echo "weave	ALL=(ALL)	NOPASSWD: ALL" >>/etc/sudoers
+
+su weave -c "PATH=$PATH make -C $WEAVE_SRC tests"
+