[lxc] add bats tests

test/builder_lxc.bats

@@ -0,0 +1,40 @@
+#!/usr/bin/env bats
+#
+# This tests the lxc builder. The teardown function will
+# delete any images in the output-lxc-* folders.
+
+#load test_helper
+#fixtures builder-lxc
+FIXTURE_ROOT="$BATS_TEST_DIRNAME/fixtures/builder-lxc"
+
+# Required parameters
+command -v lxc-create >/dev/null 2>&1 || {
+    echo "'lxc-create' must be installed via the lxc (or lxc1 for ubuntu >=16.04) package" >&2
+    exit 1
+}
+
+teardown() {
+    rm -rf output-lxc-*
+}
+
+@test "lxc: build centos minimal.json" {
+    run packer build -var template_name=centos  $FIXTURE_ROOT/minimal.json
+    [ "$status" -eq 0 ]
+    [ -f output-lxc-centos/rootfs.tar.gz ]
+    [ -f output-lxc-centos/lxc-config ]
+}
+
+
+@test "lxc: build trusty minimal.json" {
+    run packer build -var template_name=ubuntu -var template_parameters="SUITE=trusty" $FIXTURE_ROOT/minimal.json
+    [ "$status" -eq 0 ]
+    [ -f output-lxc-ubuntu/rootfs.tar.gz ]
+    [ -f output-lxc-ubuntu/lxc-config ]
+}
+
+@test "lxc: build debian minimal.json" {
+    run packer build -var template_name=debian -var template_parameters="SUITE=jessie" $FIXTURE_ROOT/minimal.json
+    [ "$status" -eq 0 ]
+    [ -f output-lxc-debian/rootfs.tar.gz ]
+    [ -f output-lxc-debian/lxc-config ]
+}

test/fixtures/builder-lxc/minimal.json

@@ -0,0 +1,15 @@
+{
+  "variables": {
+    "template_name": "debian",
+    "template_parameters": "SUITE=jessie"
+  },
+  "builders": [
+    {
+      "type": "lxc",
+      "name": "lxc-{{user `template_name`}}",
+      "template_name": "{{user `template_name`}}",
+      "config_file": "/usr/share/lxc/config/{{user `template_name`}}.common.conf",
+      "template_environment_vars": [ "{{user `template_parameters`}}" ]
+    }
+  ]
+}