Add support for flags on the service:info command

tests/service_info.bats

@@ -21,12 +21,43 @@ teardown() {
 
 @test "($PLUGIN_COMMAND_PREFIX:info) success" {
   run dokku "$PLUGIN_COMMAND_PREFIX:info" l
-  assert_contains "${lines[*]}" "DSN: redis://dokku-redis-l:6379"
+  assert_contains "${lines[*]}" "redis://dokku-redis-l:6379"
 }
 
 @test "($PLUGIN_COMMAND_PREFIX:info) replaces underscores by dash in hostname" {
   dokku "$PLUGIN_COMMAND_PREFIX:create" test_with_underscores
   run dokku "$PLUGIN_COMMAND_PREFIX:info" test_with_underscores
-  assert_contains "${lines[*]}" "DSN: redis://dokku-redis-test-with-underscores:6379"
+  assert_contains "${lines[*]}" "redis://dokku-redis-test-with-underscores:6379"
   dokku --force "$PLUGIN_COMMAND_PREFIX:destroy" test_with_underscores
 }
+
+@test "($PLUGIN_COMMAND_PREFIX:info) success with flag" {
+  run dokku "$PLUGIN_COMMAND_PREFIX:info" l --dsn
+  assert_output "redis://dokku-redis-l:6379"
+
+  run dokku "$PLUGIN_COMMAND_PREFIX:info" l --config-dir
+  assert_success
+
+  run dokku "$PLUGIN_COMMAND_PREFIX:info" l --data-dir
+  assert_success
+
+  run dokku "$PLUGIN_COMMAND_PREFIX:info" l --dsn
+  assert_success
+
+  run dokku "$PLUGIN_COMMAND_PREFIX:info" l --exposed-ports
+  assert_success
+
+  run dokku "$PLUGIN_COMMAND_PREFIX:info" l --links
+  assert_success
+
+  run dokku "$PLUGIN_COMMAND_PREFIX:info" l --status
+  assert_success
+
+  run dokku "$PLUGIN_COMMAND_PREFIX:info" l --version
+  assert_success
+}
+
+@test "($PLUGIN_COMMAND_PREFIX:info) error when invalid flag" {
+  run dokku "$PLUGIN_COMMAND_PREFIX:info" l --invalid-flag
+  assert_failure
+}

tests/test_helper.bash

@@ -47,6 +47,14 @@ assert_success() {
   fi
 }
 
+assert_failure() {
+  if [[ "$status" -eq 0 ]]; then
+    flunk "expected failed exit status"
+  elif [[ "$#" -gt 0 ]]; then
+    assert_output "$1"
+  fi
+}
+
 assert_exists() {
   if [ ! -f "$1" ]; then
     flunk "expected file to exist: $1"