docstr: ReportSchedule Api: Test create report schedule with unsaved chart
docstr_tok: ["ReportSchedule","Api",":","Test","create","report","schedule","with","unsaved","chart"]
code: def test_unsaved_report_schedule_schema(self):
      """
      ReportSchedule Api: Test create report schedule with unsaved chart
      """
      self.login(username="admin")
      chart = db.session.query(Slice).first()
      dashboard = db.session.query(Dashboard).first()
      example_db = get_example_database()
  
      report_schedule_data = {
          "type": ReportScheduleType.REPORT,
          "name": "name3",
          "description": "description",
          "creation_method": ReportCreationMethod.CHARTS,
          "crontab": "0 9 * * *",
          "chart": 0,
      }
      uri = "api/v1/report/"
      rv = self.post_assert_metric(uri, report_schedule_data, "post")
      data = json.loads(rv.data.decode("utf-8"))
      assert rv.status_code == 422
      assert (
          data["message"]["chart"]
          == "Please save your chart first, then try creating a new email report."
      )
  
imports: from datetime import datetime
  import json
  import pytz
  import pytest
  import prison
  from parameterized import parameterized
  from sqlalchemy.sql import func
  from superset import db, security_manager
  from superset.models.core import Database
  from superset.models.slice import Slice
  from superset.models.dashboard import Dashboard
  from superset.reports.models import ReportSchedule, ReportCreationMethod, ReportRecipients, ReportExecutionLog, ReportScheduleType, ReportRecipientType, ReportState
  from superset.utils.database import get_example_database
  from tests.integration_tests.base_tests import SupersetTestCase
  from tests.integration_tests.conftest import with_feature_flags
  from tests.integration_tests.fixtures.birth_names_dashboard import load_birth_names_dashboard_with_slices, load_birth_names_data
  from tests.integration_tests.reports.utils import insert_report_schedule
label_desc: Use image node_id 24 for calling the TestReportSchedulesApi obj's underlying member method code with example usage: obj.test_unsaved_report_schedule_schema() without return types