Write a unit test for the tar command.

tests/unit/tar.bats

@@ -0,0 +1,30 @@
+#!/usr/bin/env bats
+
+load test_helper
+
+setup() {
+  create_app
+}
+
+teardown() {
+  destroy_app
+}
+
+deploy_app_tar() {
+  APP_TYPE="$1"; APP_TYPE=${APP_TYPE:="nodejs-express"}
+  GIT_REMOTE="$2"; GIT_REMOTE=${GIT_REMOTE:="dokku@dokku.me:$TEST_APP"}
+  TMP=$(mktemp -d -t "dokku.me.XXXXX")
+  rmdir $TMP && cp -r ./tests/apps/$APP_TYPE $TMP
+  cd $TMP
+  tar c . | ssh dokku@dokku.me tar:in $TEST_APP || destroy_app $?
+}
+
+@test "(tar) basic deploy using tar:in" {
+  deploy_app_tar
+
+  run bash -c "response=\"$(curl -s -S my-cool-guy-test-app.dokku.me)\"; echo \$response; test \"\$response\" == \"nodejs/express\""
+  echo "output: "$output
+  echo "status: "$status
+  assert_success  
+}
+