Add test for Docker APIv2 wait

Signed-off-by: Matej Vasek <mvasek@redhat.com>

test/apiv2/26-containersWait.at

@@ -0,0 +1,47 @@
+# -*- sh -*-
+#
+# test more container-related endpoints
+#
+
+red='\e[31m'
+nc='\e[0m'
+
+podman pull "${IMAGE}" &>/dev/null
+
+# Ensure clean slate
+podman rm -a -f &>/dev/null
+
+CTR="WaitTestingCtr"
+
+t POST "containers/nonExistent/wait?condition=next-exit" '' 404
+
+podman create --name "${CTR}" --entrypoint '["sleep", "0.5"]' "${IMAGE}"
+
+t POST "containers/${CTR}/wait?condition=non-existent-cond" '' 400
+
+t POST "containers/${CTR}/wait?condition=not-running" '' 200
+
+t POST "containers/${CTR}/wait?condition=next-exit" '' 200 &
+child_pid=$!
+podman start "${CTR}"
+wait "${child_pid}"
+
+
+# check if headers are sent in advance before body
+WAIT_TEST_ERROR=""
+curl -I -X POST "http://$HOST:$PORT/containers/${CTR}/wait?condition=next-exit" &> "/dev/null" &
+child_pid=$!
+sleep 0.5
+if kill -2 "${child_pid}" 2> "/dev/null"; then
+  echo -e "${red}NOK: Failed to get response headers immediately.${nc}"  1>&2;
+  WAIT_TEST_ERROR="1"
+fi
+
+t POST "containers/${CTR}/wait?condition=removed" '' 200 &
+child_pid=$!
+podman container rm "${CTR}"
+wait "${child_pid}"
+
+if [[ "${WAIT_TEST_ERROR}" ]] ; then
+  exit 1;
+fi