initial pass at a ps plugin

tests/unit/ps.bats

@@ -0,0 +1,55 @@
+#!/usr/bin/env bats
+
+load test_helper
+
+setup() {
+  deploy_app
+}
+
+teardown() {
+  destroy_app
+}
+
+@test "ps" {
+  run bash -c "dokku ps $TEST_APP | grep -q \"node web.js\""
+  echo "output: "$output
+  echo "status: "$status
+  assert_success
+}
+
+@test "ps:start" {
+  run bash -c "dokku ps:stop $TEST_APP"
+  echo "output: "$output
+  echo "status: "$status
+  assert_success
+  run bash -c "dokku ps:start $TEST_APP"
+  echo "output: "$output
+  echo "status: "$status
+  assert_success
+  run bash -c "docker ps -q --no-trunc | grep -q $(< $DOKKU_ROOT/$TEST_APP/CONTAINER)"
+  echo "output: "$output
+  echo "status: "$status
+  assert_success
+}
+
+@test "ps:stop" {
+  run bash -c "dokku ps:stop $TEST_APP"
+  echo "output: "$output
+  echo "status: "$status
+  assert_success
+  run bash -c "docker ps -q --no-trunc | grep -q $(< $DOKKU_ROOT/$TEST_APP/CONTAINER)"
+  echo "output: "$output
+  echo "status: "$status
+  assert_failure
+}
+
+@test "ps:restart" {
+  run bash -c "dokku ps:restart $TEST_APP"
+  echo "output: "$output
+  echo "status: "$status
+  assert_success
+  run bash -c "docker ps -q --no-trunc | grep -q $(< $DOKKU_ROOT/$TEST_APP/CONTAINER)"
+  echo "output: "$output
+  echo "status: "$status
+  assert_success
+}