add env backend integration tests

.travis.yml

@@ -44,6 +44,7 @@ install:
 script:
   - ./test
   - bash integration/consul/test.sh
+  - bash integration/env/test.sh
   - bash integration/etcd/test.sh
   - bash integration/redis/test.sh
   - bash integration/rancher/test.sh

integration/env/test.sh

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+export KEY="foobar"
+export DATABASE_HOST="127.0.0.1"
+export DATABASE_PASSWORD="p@sSw0rd"
+export DATABASE_PORT="3306"
+export DATABASE_USERNAME="confd"
+export UPSTREAM_APP1="10.0.1.10:8080"
+export UPSTREAM_APP2="10.0.1.11:8080"
+export PREFIX_DATABASE_HOST="127.0.0.1"
+export PREFIX_DATABASE_PASSWORD="p@sSw0rd"
+export PREFIX_DATABASE_PORT="3306"
+export PREFIX_DATABASE_USERNAME="confd"
+export PREFIX_UPSTREAM_APP1="10.0.1.10:8080"
+export PREFIX_UPSTREAM_APP2="10.0.1.11:8080"
+
+confd --onetime --log-level debug --confdir ./integration/confdir --interval 5 --backend env