test: check app list doesn't explode if missing .env

See #560

tests/integration/app_list.bats

@@ -8,6 +8,10 @@ setup_file(){
 }
 
 teardown_file(){
+  if [[ ! -f "$ABRA_DIR/servers/$TEST_SERVER/$TEST_APP_DOMAIN.env" ]]; then
+    _new_app
+  fi
+
   _undeploy_app
   _rm_app
   _rm_server
@@ -19,6 +23,10 @@ setup(){
 }
 
 teardown(){
+  if [[ ! -f "$ABRA_DIR/servers/$TEST_SERVER/$TEST_APP_DOMAIN.env" ]]; then
+    _new_app
+  fi
+
   _reset_recipe
   _undeploy_app
 }
@@ -137,3 +145,21 @@ teardown(){
   assert_success
   assert_not_exists "$ABRA_DIR/servers/foo.com"
 }
+
+# bats test_tags=slow
+@test "list does not fail if missing .env" {
+  _deploy_app
+
+  run $ABRA app ls --status
+  assert_success
+
+  run rm -rf "$ABRA_DIR/servers/$TEST_SERVER/$TEST_APP_DOMAIN.env"
+  assert_success
+  assert_not_exists "$ABRA_DIR/servers/$TEST_SERVER/$TEST_APP_DOMAIN.env"
+
+  output=$("$ABRA" app ls --server "$TEST_SERVER" --status --machine)
+  run diff \
+    <(jq -S "." <(echo "$output")) \
+    <(jq -S "." <(echo '{}'))
+  assert_success
+}