#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

"""Unit tests for BigQuery sources and sinks."""
# pytype: skip-file

from __future__ import absolute_import

import datetime
import decimal
import json
import logging
import os
import pickle
import random
import re
import time
import unittest
import uuid

# patches unittest.TestCase to be python3 compatible
import future.tests.base  # pylint: disable=unused-import
import hamcrest as hc
import mock
import pytz
from nose.plugins.attrib import attr
from parameterized import param
from parameterized import parameterized

import apache_beam as beam
from apache_beam.internal import pickler
from apache_beam.internal.gcp.json_value import to_json_value
from apache_beam.io.filebasedsink_test import _TestCaseWithTempDirCleanUp
from apache_beam.io.gcp import bigquery_tools
from apache_beam.io.gcp.bigquery import TableRowJsonCoder
from apache_beam.io.gcp.bigquery import WriteToBigQuery
from apache_beam.io.gcp.bigquery import _StreamToBigQuery
from apache_beam.io.gcp.bigquery_file_loads_test import _ELEMENTS
from apache_beam.io.gcp.bigquery_read_internal import _JsonToDictCoder
from apache_beam.io.gcp.bigquery_read_internal import bigquery_export_destination_uri
from apache_beam.io.gcp.bigquery_tools import JSON_COMPLIANCE_ERROR
from apache_beam.io.gcp.bigquery_tools import BigQueryWrapper
from apache_beam.io.gcp.bigquery_tools import RetryStrategy
from apache_beam.io.gcp.internal.clients import bigquery
from apache_beam.io.gcp.pubsub import ReadFromPubSub
from apache_beam.io.gcp.tests import utils
from apache_beam.io.gcp.tests.bigquery_matcher import BigqueryFullResultMatcher
from apache_beam.io.gcp.tests.bigquery_matcher import BigqueryFullResultStreamingMatcher
from apache_beam.io.gcp.tests.bigquery_matcher import BigQueryTableMatcher
from apache_beam.options import value_provider
from apache_beam.options.pipeline_options import PipelineOptions
from apache_beam.options.pipeline_options import StandardOptions
from apache_beam.options.value_provider import RuntimeValueProvider
from apache_beam.options.value_provider import StaticValueProvider
from apache_beam.runners.dataflow.test_dataflow_runner import TestDataflowRunner
from apache_beam.runners.runner import PipelineState
from apache_beam.testing import test_utils
from apache_beam.testing.pipeline_verifiers import PipelineStateMatcher
from apache_beam.testing.test_pipeline import TestPipeline
from apache_beam.testing.test_stream import TestStream
from apache_beam.testing.util import assert_that
from apache_beam.testing.util import equal_to
from apache_beam.transforms.display import DisplayData
from apache_beam.transforms.display_test import DisplayDataItemMatcher

# Protect against environments where bigquery library is not available.
# pylint: disable=wrong-import-order, wrong-import-position
try:
  from apitools.base.py.exceptions import HttpError
except ImportError:
  HttpError = None
# pylint: enable=wrong-import-order, wrong-import-position

_LOGGER = logging.getLogger(__name__)


@unittest.skipIf(HttpError is None, 'GCP dependencies are not installed')
class TestTableRowJsonCoder(unittest.TestCase):
  def test_row_as_table_row(self):
    schema_definition = [('s', 'STRING'), ('i', 'INTEGER'), ('f', 'FLOAT'),
                         ('b', 'BOOLEAN'), ('n', 'NUMERIC'), ('r', 'RECORD'),
                         ('g', 'GEOGRAPHY')]
    data_definition = [
        'abc',
        123,
        123.456,
        True,
        decimal.Decimal('987654321.987654321'), {
            'a': 'b'
        },
        'LINESTRING(1 2, 3 4, 5 6, 7 8)'
    ]
    str_def = (
        '{"s": "abc", '
        '"i": 123, '
        '"f": 123.456, '
        '"b": true, '
        '"n": "987654321.987654321", '
        '"r": {"a": "b"}, '
        '"g": "LINESTRING(1 2, 3 4, 5 6, 7 8)"}')
    schema = bigquery.TableSchema(
        fields=[
            bigquery.TableFieldSchema(name=k, type=v) for k,
            v in schema_definition
        ])
    coder = TableRowJsonCoder(table_schema=schema)

    def value_or_decimal_to_json(val):
      if isinstance(val, decimal.Decimal):
        return to_json_value(str(val))
      else:
        return to_json_value(val)

    test_row = bigquery.TableRow(
        f=[
            bigquery.TableCell(v=value_or_decimal_to_json(e))
            for e in data_definition
        ])

    self.assertEqual(str_def, coder.encode(test_row))
    self.assertEqual(test_row, coder.decode(coder.encode(test_row)))
    # A coder without schema can still decode.
    self.assertEqual(
        test_row, TableRowJsonCoder().decode(coder.encode(test_row)))

  def test_row_and_no_schema(self):
    coder = TableRowJsonCoder()
    test_row = bigquery.TableRow(
        f=[
            bigquery.TableCell(v=to_json_value(e))
            for e in ['abc', 123, 123.456, True]
        ])
    with self.assertRaisesRegex(AttributeError,
                                r'^The TableRowJsonCoder requires'):
      coder.encode(test_row)

  def json_compliance_exception(self, value):
    with self.assertRaisesRegex(ValueError, re.escape(JSON_COMPLIANCE_ERROR)):
      schema_definition = [('f', 'FLOAT')]
      schema = bigquery.TableSchema(
          fields=[
              bigquery.TableFieldSchema(name=k, type=v) for k,
              v in schema_definition
          ])
      coder = TableRowJsonCoder(table_schema=schema)
      test_row = bigquery.TableRow(
          f=[bigquery.TableCell(v=to_json_value(value))])
      coder.encode(test_row)

  def test_invalid_json_nan(self):
    self.json_compliance_exception(float('nan'))

  def test_invalid_json_inf(self):
    self.json_compliance_exception(float('inf'))

  def test_invalid_json_neg_inf(self):
    self.json_compliance_exception(float('-inf'))


@unittest.skipIf(HttpError is None, 'GCP dependencies are not installed')
class TestBigQuerySource(unittest.TestCase):
  def test_display_data_item_on_validate_true(self):
    source = beam.io.BigQuerySource(
        'dataset.table', validate=True, use_dataflow_native_source=True)

    dd = DisplayData.create_from(source)
    expected_items = [
        DisplayDataItemMatcher('validation', True),
        DisplayDataItemMatcher('table', 'dataset.table')
    ]
    hc.assert_that(dd.items, hc.contains_inanyorder(*expected_items))

  def test_table_reference_display_data(self):
    source = beam.io.BigQuerySource(
        'dataset.table', use_dataflow_native_source=True)
    dd = DisplayData.create_from(source)
    expected_items = [
        DisplayDataItemMatcher('validation', False),
        DisplayDataItemMatcher('table', 'dataset.table')
    ]
    hc.assert_that(dd.items, hc.contains_inanyorder(*expected_items))

    source = beam.io.BigQuerySource(
        'project:dataset.table', use_dataflow_native_source=True)
    dd = DisplayData.create_from(source)
    expected_items = [
        DisplayDataItemMatcher('validation', False),
        DisplayDataItemMatcher('table', 'project:dataset.table')
    ]
    hc.assert_that(dd.items, hc.contains_inanyorder(*expected_items))

    source = beam.io.BigQuerySource(
        'xyz.com:project:dataset.table', use_dataflow_native_source=True)
    dd = DisplayData.create_from(source)
    expected_items = [
        DisplayDataItemMatcher('validation', False),
        DisplayDataItemMatcher('table', 'xyz.com:project:dataset.table')
    ]
    hc.assert_that(dd.items, hc.contains_inanyorder(*expected_items))

  def test_parse_table_reference(self):
    source = beam.io.BigQuerySource(
        'dataset.table', use_dataflow_native_source=True)
    self.assertEqual(source.table_reference.datasetId, 'dataset')
    self.assertEqual(source.table_reference.tableId, 'table')

    source = beam.io.BigQuerySource(
        'project:dataset.table', use_dataflow_native_source=True)
    self.assertEqual(source.table_reference.projectId, 'project')
    self.assertEqual(source.table_reference.datasetId, 'dataset')
    self.assertEqual(source.table_reference.tableId, 'table')

    source = beam.io.BigQuerySource(
        'xyz.com:project:dataset.table', use_dataflow_native_source=True)
    self.assertEqual(source.table_reference.projectId, 'xyz.com:project')
    self.assertEqual(source.table_reference.datasetId, 'dataset')
    self.assertEqual(source.table_reference.tableId, 'table')

    source = beam.io.BigQuerySource(
        query='my_query', use_dataflow_native_source=True)
    self.assertEqual(source.query, 'my_query')
    self.assertIsNone(source.table_reference)
    self.assertTrue(source.use_legacy_sql)

  def test_query_only_display_data(self):
    source = beam.io.BigQuerySource(
        query='my_query', use_dataflow_native_source=True)
    dd = DisplayData.create_from(source)
    expected_items = [
        DisplayDataItemMatcher('validation', False),
        DisplayDataItemMatcher('query', 'my_query')
    ]
    hc.assert_that(dd.items, hc.contains_inanyorder(*expected_items))

  def test_specify_query_sql_format(self):
    source = beam.io.BigQuerySource(
        query='my_query',
        use_standard_sql=True,
        use_dataflow_native_source=True)
    self.assertEqual(source.query, 'my_query')
    self.assertFalse(source.use_legacy_sql)

  def test_specify_query_flattened_records(self):
    source = beam.io.BigQuerySource(
        query='my_query',
        flatten_results=False,
        use_dataflow_native_source=True)
    self.assertFalse(source.flatten_results)

  def test_specify_query_unflattened_records(self):
    source = beam.io.BigQuerySource(
        query='my_query', flatten_results=True, use_dataflow_native_source=True)
    self.assertTrue(source.flatten_results)

  def test_specify_query_without_table(self):
    source = beam.io.BigQuerySource(
        query='my_query', use_dataflow_native_source=True)
    self.assertEqual(source.query, 'my_query')
    self.assertIsNone(source.table_reference)

  def test_date_partitioned_table_name(self):
    source = beam.io.BigQuerySource(
        'dataset.table$20030102',
        validate=True,
        use_dataflow_native_source=True)
    dd = DisplayData.create_from(source)
    expected_items = [
        DisplayDataItemMatcher('validation', True),
        DisplayDataItemMatcher('table', 'dataset.table$20030102')
    ]
    hc.assert_that(dd.items, hc.contains_inanyorder(*expected_items))


@unittest.skipIf(HttpError is None, 'GCP dependencies are not installed')
class TestJsonToDictCoder(unittest.TestCase):
  @staticmethod
  def _make_schema(fields):
    def _fill_schema(fields):
      for field in fields:
        table_field = bigquery.TableFieldSchema()
        table_field.name, table_field.type, table_field.mode, nested_fields, \
          = field
        if nested_fields:
          table_field.fields = list(_fill_schema(nested_fields))
        yield table_field

    schema = bigquery.TableSchema()
    schema.fields = list(_fill_schema(fields))
    return schema

  def test_coder_is_pickable(self):
    try:
      schema = self._make_schema([
          (
              'record',
              'RECORD',
              'NULLABLE', [
                  ('float', 'FLOAT', 'NULLABLE', []),
              ]),
          ('integer', 'INTEGER', 'NULLABLE', []),
      ])
      coder = _JsonToDictCoder(schema)
      pickler.loads(pickler.dumps(coder))
    except pickle.PicklingError:
      self.fail('{} is not pickable'.format(coder.__class__.__name__))

  def test_values_are_converted(self):
    input_row = b'{"float": "10.5", "string": "abc"}'
    expected_row = {'float': 10.5, 'string': 'abc'}
    schema = self._make_schema([('float', 'FLOAT', 'NULLABLE', []),
                                ('string', 'STRING', 'NULLABLE', [])])
    coder = _JsonToDictCoder(schema)

    actual = coder.decode(input_row)
    self.assertEqual(expected_row, actual)

  def test_null_fields_are_preserved(self):
    input_row = b'{"float": "10.5"}'
    expected_row = {'float': 10.5, 'string': None}
    schema = self._make_schema([('float', 'FLOAT', 'NULLABLE', []),
                                ('string', 'STRING', 'NULLABLE', [])])
    coder = _JsonToDictCoder(schema)

    actual = coder.decode(input_row)
    self.assertEqual(expected_row, actual)

  def test_record_field_is_properly_converted(self):
    input_row = b'{"record": {"float": "55.5"}, "integer": 10}'
    expected_row = {'record': {'float': 55.5}, 'integer': 10}
    schema = self._make_schema([
        (
            'record',
            'RECORD',
            'NULLABLE', [
                ('float', 'FLOAT', 'NULLABLE', []),
            ]),
        ('integer', 'INTEGER', 'NULLABLE', []),
    ])
    coder = _JsonToDictCoder(schema)

    actual = coder.decode(input_row)
    self.assertEqual(expected_row, actual)

  def test_record_and_repeatable_field_is_properly_converted(self):
    input_row = b'{"record": [{"float": "55.5"}, {"float": "65.5"}], ' \
                b'"integer": 10}'
    expected_row = {'record': [{'float': 55.5}, {'float': 65.5}], 'integer': 10}
    schema = self._make_schema([
        (
            'record',
            'RECORD',
            'REPEATED', [
                ('float', 'FLOAT', 'NULLABLE', []),
            ]),
        ('integer', 'INTEGER', 'NULLABLE', []),
    ])
    coder = _JsonToDictCoder(schema)

    actual = coder.decode(input_row)
    self.assertEqual(expected_row, actual)

  def test_repeatable_field_is_properly_converted(self):
    input_row = b'{"repeated": ["55.5", "65.5"], "integer": "10"}'
    expected_row = {'repeated': [55.5, 65.5], 'integer': 10}
    schema = self._make_schema([
        ('repeated', 'FLOAT', 'REPEATED', []),
        ('integer', 'INTEGER', 'NULLABLE', []),
    ])
    coder = _JsonToDictCoder(schema)

    actual = coder.decode(input_row)
    self.assertEqual(expected_row, actual)


@unittest.skipIf(HttpError is None, 'GCP dependencies are not installed')
class TestReadFromBigQuery(unittest.TestCase):
  @classmethod
  def setUpClass(cls):
    class UserDefinedOptions(PipelineOptions):
      @classmethod
      def _add_argparse_args(cls, parser):
        parser.add_value_provider_argument('--gcs_location')

    cls.UserDefinedOptions = UserDefinedOptions

  def tearDown(self):
    # Reset runtime options to avoid side-effects caused by other tests.
    RuntimeValueProvider.set_runtime_options(None)

  def test_get_destination_uri_empty_runtime_vp(self):
    with self.assertRaisesRegex(ValueError,
                                '^ReadFromBigQuery requires a GCS '
                                'location to be provided'):
      # Don't provide any runtime values.
      RuntimeValueProvider.set_runtime_options({})
      options = self.UserDefinedOptions()

      bigquery_export_destination_uri(
          options.gcs_location, None, uuid.uuid4().hex)

  def test_get_destination_uri_none(self):
    with self.assertRaisesRegex(ValueError,
                                '^ReadFromBigQuery requires a GCS '
                                'location to be provided'):
      bigquery_export_destination_uri(None, None, uuid.uuid4().hex)

  def test_get_destination_uri_runtime_vp(self):
    # Provide values at job-execution time.
    RuntimeValueProvider.set_runtime_options({'gcs_location': 'gs://bucket'})
    options = self.UserDefinedOptions()
    unique_id = uuid.uuid4().hex

    uri = bigquery_export_destination_uri(options.gcs_location, None, unique_id)
    self.assertEqual(
        uri, 'gs://bucket/' + unique_id + '/bigquery-table-dump-*.json')

  def test_get_destination_uri_static_vp(self):
    unique_id = uuid.uuid4().hex
    uri = bigquery_export_destination_uri(
        StaticValueProvider(str, 'gs://bucket'), None, unique_id)
    self.assertEqual(
        uri, 'gs://bucket/' + unique_id + '/bigquery-table-dump-*.json')

  def test_get_destination_uri_fallback_temp_location(self):
    # Don't provide any runtime values.
    RuntimeValueProvider.set_runtime_options({})
    options = self.UserDefinedOptions()

    with self.assertLogs('apache_beam.io.gcp.bigquery_read_internal',
                         level='DEBUG') as context:
      bigquery_export_destination_uri(
          options.gcs_location, 'gs://bucket', uuid.uuid4().hex)
    self.assertEqual(
        context.output,
        [
            'DEBUG:apache_beam.io.gcp.bigquery_read_internal:gcs_location is '
            'empty, using temp_location instead'
        ])

  @mock.patch.object(BigQueryWrapper, '_delete_dataset')
  @mock.patch('apache_beam.io.gcp.internal.clients.bigquery.BigqueryV2')
  def test_temp_dataset_location_is_configurable(self, api, delete_dataset):
    temp_dataset = bigquery.DatasetReference(
        projectId='temp-project', datasetId='bq_dataset')
    bq = BigQueryWrapper(client=api, temp_dataset_id=temp_dataset.datasetId)
    gcs_location = 'gs://gcs_location'

    # bq.get_or_create_dataset.return_value = temp_dataset
    c = beam.io.gcp.bigquery._CustomBigQuerySource(
        query='select * from test_table',
        gcs_location=gcs_location,
        validate=True,
        pipeline_options=beam.options.pipeline_options.PipelineOptions(),
        job_name='job_name',
        step_name='step_name',
        project='execution_project',
        **{'temp_dataset': temp_dataset})

    api.datasets.Get.side_effect = HttpError({
        'status_code': 404, 'status': 404
    },
                                             '',
                                             '')

    c._setup_temporary_dataset(bq)
    api.datasets.Insert.assert_called_with(
        bigquery.BigqueryDatasetsInsertRequest(
            dataset=bigquery.Dataset(datasetReference=temp_dataset),
            projectId=temp_dataset.projectId))

    api.datasets.Get.return_value = temp_dataset
    api.datasets.Get.side_effect = None
    bq.clean_up_temporary_dataset(temp_dataset.projectId)
    delete_dataset.assert_called_with(
        temp_dataset.projectId, temp_dataset.datasetId, True)

    self.assertEqual(
        bq._get_temp_table(temp_dataset.projectId),
        bigquery.TableReference(
            projectId=temp_dataset.projectId,
            datasetId=temp_dataset.datasetId,
            tableId=BigQueryWrapper.TEMP_TABLE + bq._temporary_table_suffix))


@unittest.skipIf(HttpError is None, 'GCP dependencies are not installed')
class TestBigQuerySink(unittest.TestCase):
  def test_table_spec_display_data(self):
    sink = beam.io.BigQuerySink('dataset.table')
    dd = DisplayData.create_from(sink)
    expected_items = [
        DisplayDataItemMatcher('table', 'dataset.table'),
        DisplayDataItemMatcher('validation', False)
    ]
    hc.assert_that(dd.items, hc.contains_inanyorder(*expected_items))

  def test_parse_schema_descriptor(self):
    sink = beam.io.BigQuerySink('dataset.table', schema='s:STRING, n:INTEGER')
    self.assertEqual(sink.table_reference.datasetId, 'dataset')
    self.assertEqual(sink.table_reference.tableId, 'table')
    result_schema = {
        field.name: field.type
        for field in sink.table_schema.fields
    }
    self.assertEqual({'n': 'INTEGER', 's': 'STRING'}, result_schema)

  def test_project_table_display_data(self):
    sinkq = beam.io.BigQuerySink('PROJECT:dataset.table')
    dd = DisplayData.create_from(sinkq)
    expected_items = [
        DisplayDataItemMatcher('table', 'PROJECT:dataset.table'),
        DisplayDataItemMatcher('validation', False)
    ]
    hc.assert_that(dd.items, hc.contains_inanyorder(*expected_items))

  def test_simple_schema_as_json(self):
    sink = beam.io.BigQuerySink(
        'PROJECT:dataset.table', schema='s:STRING, n:INTEGER')
    self.assertEqual(
        json.dumps({
            'fields': [{
                'name': 's', 'type': 'STRING', 'mode': 'NULLABLE'
            }, {
                'name': 'n', 'type': 'INTEGER', 'mode': 'NULLABLE'
            }]
        }),
        sink.schema_as_json())

  def test_nested_schema_as_json(self):
    string_field = bigquery.TableFieldSchema(
        name='s', type='STRING', mode='NULLABLE', description='s description')
    number_field = bigquery.TableFieldSchema(
        name='n', type='INTEGER', mode='REQUIRED', description='n description')
    record_field = bigquery.TableFieldSchema(
        name='r',
        type='RECORD',
        mode='REQUIRED',
        description='r description',
        fields=[string_field, number_field])
    schema = bigquery.TableSchema(fields=[record_field])
    sink = beam.io.BigQuerySink('dataset.table', schema=schema)
    self.assertEqual({
        'fields': [{
            'name': 'r',
            'type': 'RECORD',
            'mode': 'REQUIRED',
            'description': 'r description',
            'fields': [{
                'name': 's',
                'type': 'STRING',
                'mode': 'NULLABLE',
                'description': 's description'
            },
                       {
                           'name': 'n',
                           'type': 'INTEGER',
                           'mode': 'REQUIRED',
                           'description': 'n description'
                       }]
        }]
    },
                     json.loads(sink.schema_as_json()))


@unittest.skipIf(HttpError is None, 'GCP dependencies are not installed')
class TestWriteToBigQuery(unittest.TestCase):
  def _cleanup_files(self):
    if os.path.exists('insert_calls1'):
      os.remove('insert_calls1')

    if os.path.exists('insert_calls2'):
      os.remove('insert_calls2')

  def setUp(self):
    self._cleanup_files()

  def tearDown(self):
    self._cleanup_files()

  def test_noop_schema_parsing(self):
    expected_table_schema = None
    table_schema = beam.io.gcp.bigquery.BigQueryWriteFn.get_table_schema(
        schema=None)
    self.assertEqual(expected_table_schema, table_schema)

  def test_dict_schema_parsing(self):
    schema = {
        'fields': [{
            'name': 's', 'type': 'STRING', 'mode': 'NULLABLE'
        }, {
            'name': 'n', 'type': 'INTEGER', 'mode': 'NULLABLE'
        },
                   {
                       'name': 'r',
                       'type': 'RECORD',
                       'mode': 'NULLABLE',
                       'fields': [{
                           'name': 'x', 'type': 'INTEGER', 'mode': 'NULLABLE'
                       }]
                   }]
    }
    table_schema = beam.io.gcp.bigquery.BigQueryWriteFn.get_table_schema(schema)
    string_field = bigquery.TableFieldSchema(
        name='s', type='STRING', mode='NULLABLE')
    nested_field = bigquery.TableFieldSchema(
        name='x', type='INTEGER', mode='NULLABLE')
    number_field = bigquery.TableFieldSchema(
        name='n', type='INTEGER', mode='NULLABLE')
    record_field = bigquery.TableFieldSchema(
        name='r', type='RECORD', mode='NULLABLE', fields=[nested_field])
    expected_table_schema = bigquery.TableSchema(
        fields=[string_field, number_field, record_field])
    self.assertEqual(expected_table_schema, table_schema)

  def test_string_schema_parsing(self):
    schema = 's:STRING, n:INTEGER'
    expected_dict_schema = {
        'fields': [{
            'name': 's', 'type': 'STRING', 'mode': 'NULLABLE'
        }, {
            'name': 'n', 'type': 'INTEGER', 'mode': 'NULLABLE'
        }]
    }
    dict_schema = (
        beam.io.gcp.bigquery.WriteToBigQuery.get_dict_table_schema(schema))
    self.assertEqual(expected_dict_schema, dict_schema)

  def test_table_schema_parsing(self):
    string_field = bigquery.TableFieldSchema(
        name='s', type='STRING', mode='NULLABLE')
    nested_field = bigquery.TableFieldSchema(
        name='x', type='INTEGER', mode='NULLABLE')
    number_field = bigquery.TableFieldSchema(
        name='n', type='INTEGER', mode='NULLABLE')
    record_field = bigquery.TableFieldSchema(
        name='r', type='RECORD', mode='NULLABLE', fields=[nested_field])
    schema = bigquery.TableSchema(
        fields=[string_field, number_field, record_field])
    expected_dict_schema = {
        'fields': [{
            'name': 's', 'type': 'STRING', 'mode': 'NULLABLE'
        }, {
            'name': 'n', 'type': 'INTEGER', 'mode': 'NULLABLE'
        },
                   {
                       'name': 'r',
                       'type': 'RECORD',
                       'mode': 'NULLABLE',
                       'fields': [{
                           'name': 'x', 'type': 'INTEGER', 'mode': 'NULLABLE'
                       }]
                   }]
    }
    dict_schema = (
        beam.io.gcp.bigquery.WriteToBigQuery.get_dict_table_schema(schema))
    self.assertEqual(expected_dict_schema, dict_schema)

  def test_table_schema_parsing_end_to_end(self):
    string_field = bigquery.TableFieldSchema(
        name='s', type='STRING', mode='NULLABLE')
    nested_field = bigquery.TableFieldSchema(
        name='x', type='INTEGER', mode='NULLABLE')
    number_field = bigquery.TableFieldSchema(
        name='n', type='INTEGER', mode='NULLABLE')
    record_field = bigquery.TableFieldSchema(
        name='r', type='RECORD', mode='NULLABLE', fields=[nested_field])
    schema = bigquery.TableSchema(
        fields=[string_field, number_field, record_field])
    table_schema = beam.io.gcp.bigquery.BigQueryWriteFn.get_table_schema(
        beam.io.gcp.bigquery.WriteToBigQuery.get_dict_table_schema(schema))
    self.assertEqual(table_schema, schema)

  def test_none_schema_parsing(self):
    schema = None
    expected_dict_schema = None
    dict_schema = (
        beam.io.gcp.bigquery.WriteToBigQuery.get_dict_table_schema(schema))
    self.assertEqual(expected_dict_schema, dict_schema)

  def test_noop_dict_schema_parsing(self):
    schema = {
        'fields': [{
            'name': 's', 'type': 'STRING', 'mode': 'NULLABLE'
        }, {
            'name': 'n', 'type': 'INTEGER', 'mode': 'NULLABLE'
        }]
    }
    expected_dict_schema = schema
    dict_schema = (
        beam.io.gcp.bigquery.WriteToBigQuery.get_dict_table_schema(schema))
    self.assertEqual(expected_dict_schema, dict_schema)

  def test_schema_autodetect_not_allowed_with_avro_file_loads(self):
    with TestPipeline() as p:
      pc = p | beam.Impulse()

      with self.assertRaisesRegex(ValueError, '^A schema must be provided'):
        _ = (
            pc
            | 'No Schema' >> beam.io.gcp.bigquery.WriteToBigQuery(
                "dataset.table",
                schema=None,
                temp_file_format=bigquery_tools.FileFormat.AVRO))

      with self.assertRaisesRegex(ValueError,
                                  '^Schema auto-detection is not supported'):
        _ = (
            pc
            | 'Schema Autodetected' >> beam.io.gcp.bigquery.WriteToBigQuery(
                "dataset.table",
                schema=beam.io.gcp.bigquery.SCHEMA_AUTODETECT,
                temp_file_format=bigquery_tools.FileFormat.AVRO))

  def test_to_from_runner_api(self):
    """Tests that serialization of WriteToBigQuery is correct.

    This is not intended to be a change-detector test. As such, this only tests
    the more complicated serialization logic of parameters: ValueProviders,
    callables, and side inputs.
    """
    FULL_OUTPUT_TABLE = 'test_project:output_table'

    p = TestPipeline()

    # Used for testing side input parameters.
    table_record_pcv = beam.pvalue.AsDict(
        p | "MakeTable" >> beam.Create([('table', FULL_OUTPUT_TABLE)]))

    # Used for testing value provider parameters.
    schema = value_provider.StaticValueProvider(str, '"a:str"')

    original = WriteToBigQuery(
        table=lambda _,
        side_input: side_input['table'],
        table_side_inputs=(table_record_pcv, ),
        schema=schema)

    # pylint: disable=expression-not-assigned
    p | 'MyWriteToBigQuery' >> original

    # Run the pipeline through to generate a pipeline proto from an empty
    # context. This ensures that the serialization code ran.
    pipeline_proto, context = TestPipeline.from_runner_api(
        p.to_runner_api(), p.runner, p.get_pipeline_options()).to_runner_api(
            return_context=True)

    # Find the transform from the context.
    write_to_bq_id = [
        k for k,
        v in pipeline_proto.components.transforms.items()
        if v.unique_name == 'MyWriteToBigQuery'
    ][0]
    deserialized_node = context.transforms.get_by_id(write_to_bq_id)
    deserialized = deserialized_node.transform
    self.assertIsInstance(deserialized, WriteToBigQuery)

    # Test that the serialization of a value provider is correct.
    self.assertEqual(original.schema, deserialized.schema)

    # Test that the serialization of a callable is correct.
    self.assertEqual(
        deserialized._table(None, {'table': FULL_OUTPUT_TABLE}),
        FULL_OUTPUT_TABLE)

    # Test that the serialization of a side input is correct.
    self.assertEqual(
        len(original.table_side_inputs), len(deserialized.table_side_inputs))
    original_side_input_data = original.table_side_inputs[0]._side_input_data()
    deserialized_side_input_data = deserialized.table_side_inputs[
        0]._side_input_data()
    self.assertEqual(
        original_side_input_data.access_pattern,
        deserialized_side_input_data.access_pattern)
    self.assertEqual(
        original_side_input_data.window_mapping_fn,
        deserialized_side_input_data.window_mapping_fn)
    self.assertEqual(
        original_side_input_data.view_fn, deserialized_side_input_data.view_fn)


@unittest.skipIf(HttpError is None, 'GCP dependencies are not installed')
class BigQueryStreamingInsertTransformTests(unittest.TestCase):
  def test_dofn_client_process_performs_batching(self):
    client = mock.Mock()
    client.tables.Get.return_value = bigquery.Table(
        tableReference=bigquery.TableReference(
            projectId='project_id', datasetId='dataset_id', tableId='table_id'))
    client.tabledata.InsertAll.return_value = \
      bigquery.TableDataInsertAllResponse(insertErrors=[])
    create_disposition = beam.io.BigQueryDisposition.CREATE_NEVER
    write_disposition = beam.io.BigQueryDisposition.WRITE_APPEND

    fn = beam.io.gcp.bigquery.BigQueryWriteFn(
        batch_size=2,
        create_disposition=create_disposition,
        write_disposition=write_disposition,
        kms_key=None,
        test_client=client)

    fn.process(('project_id:dataset_id.table_id', {'month': 1}))

    # InsertRows not called as batch size is not hit yet
    self.assertFalse(client.tabledata.InsertAll.called)

  def test_dofn_client_process_flush_called(self):
    client = mock.Mock()
    client.tables.Get.return_value = bigquery.Table(
        tableReference=bigquery.TableReference(
            projectId='project_id', datasetId='dataset_id', tableId='table_id'))
    client.tabledata.InsertAll.return_value = (
        bigquery.TableDataInsertAllResponse(insertErrors=[]))
    create_disposition = beam.io.BigQueryDisposition.CREATE_NEVER
    write_disposition = beam.io.BigQueryDisposition.WRITE_APPEND

    fn = beam.io.gcp.bigquery.BigQueryWriteFn(
        batch_size=2,
        create_disposition=create_disposition,
        write_disposition=write_disposition,
        kms_key=None,
        test_client=client)

    fn.start_bundle()
    fn.process(('project_id:dataset_id.table_id', ({'month': 1}, 'insertid1')))
    fn.process(('project_id:dataset_id.table_id', ({'month': 2}, 'insertid2')))
    # InsertRows called as batch size is hit
    self.assertTrue(client.tabledata.InsertAll.called)

  def test_dofn_client_finish_bundle_flush_called(self):
    client = mock.Mock()
    client.tables.Get.return_value = bigquery.Table(
        tableReference=bigquery.TableReference(
            projectId='project_id', datasetId='dataset_id', tableId='table_id'))
    client.tabledata.InsertAll.return_value = \
      bigquery.TableDataInsertAllResponse(insertErrors=[])
    create_disposition = beam.io.BigQueryDisposition.CREATE_IF_NEEDED
    write_disposition = beam.io.BigQueryDisposition.WRITE_APPEND

    fn = beam.io.gcp.bigquery.BigQueryWriteFn(
        batch_size=2,
        create_disposition=create_disposition,
        write_disposition=write_disposition,
        kms_key=None,
        test_client=client)

    fn.start_bundle()

    # Destination is a tuple of (destination, schema) to ensure the table is
    # created.
    fn.process(('project_id:dataset_id.table_id', ({'month': 1}, 'insertid3')))

    self.assertTrue(client.tables.Get.called)
    # InsertRows not called as batch size is not hit
    self.assertFalse(client.tabledata.InsertAll.called)

    fn.finish_bundle()
    # InsertRows called in finish bundle
    self.assertTrue(client.tabledata.InsertAll.called)

  def test_dofn_client_no_records(self):
    client = mock.Mock()
    client.tables.Get.return_value = bigquery.Table(
        tableReference=bigquery.TableReference(
            projectId='project_id', datasetId='dataset_id', tableId='table_id'))
    client.tabledata.InsertAll.return_value = \
      bigquery.TableDataInsertAllResponse(insertErrors=[])
    create_disposition = beam.io.BigQueryDisposition.CREATE_NEVER
    write_disposition = beam.io.BigQueryDisposition.WRITE_APPEND

    fn = beam.io.gcp.bigquery.BigQueryWriteFn(
        batch_size=2,
        create_disposition=create_disposition,
        write_disposition=write_disposition,
        kms_key=None,
        test_client=client)

    fn.start_bundle()
    # InsertRows not called as batch size is not hit
    self.assertFalse(client.tabledata.InsertAll.called)

    fn.finish_bundle()
    # InsertRows not called in finish bundle as no records
    self.assertFalse(client.tabledata.InsertAll.called)

  def test_with_batched_input(self):
    client = mock.Mock()
    client.tables.Get.return_value = bigquery.Table(
        tableReference=bigquery.TableReference(
            projectId='project_id', datasetId='dataset_id', tableId='table_id'))
    client.tabledata.InsertAll.return_value = \
      bigquery.TableDataInsertAllResponse(insertErrors=[])
    create_disposition = beam.io.BigQueryDisposition.CREATE_IF_NEEDED
    write_disposition = beam.io.BigQueryDisposition.WRITE_APPEND

    fn = beam.io.gcp.bigquery.BigQueryWriteFn(
        batch_size=10,
        create_disposition=create_disposition,
        write_disposition=write_disposition,
        kms_key=None,
        with_batched_input=True,
        test_client=client)

    fn.start_bundle()

    # Destination is a tuple of (destination, schema) to ensure the table is
    # created.
    fn.process((
        'project_id:dataset_id.table_id',
        [({
            'month': 1
        }, 'insertid3'), ({
            'month': 2
        }, 'insertid2'), ({
            'month': 3
        }, 'insertid1')]))

    # InsertRows called since the input is already batched.
    self.assertTrue(client.tabledata.InsertAll.called)


@unittest.skipIf(HttpError is None, 'GCP dependencies are not installed')
class PipelineBasedStreamingInsertTest(_TestCaseWithTempDirCleanUp):
  def test_failure_has_same_insert_ids(self):
    tempdir = '%s%s' % (self._new_tempdir(), os.sep)
    file_name_1 = os.path.join(tempdir, 'file1')
    file_name_2 = os.path.join(tempdir, 'file2')

    def store_callback(arg):
      insert_ids = [r.insertId for r in arg.tableDataInsertAllRequest.rows]
      colA_values = [
          r.json.additionalProperties[0].value.string_value
          for r in arg.tableDataInsertAllRequest.rows
      ]
      json_output = {'insertIds': insert_ids, 'colA_values': colA_values}
      # The first time we try to insert, we save those insertions in
      # file insert_calls1.
      if not os.path.exists(file_name_1):
        with open(file_name_1, 'w') as f:
          json.dump(json_output, f)
        raise RuntimeError()
      else:
        with open(file_name_2, 'w') as f:
          json.dump(json_output, f)

      res = mock.Mock()
      res.insertErrors = []
      return res

    client = mock.Mock()
    client.tabledata.InsertAll = mock.Mock(side_effect=store_callback)

    # Using the bundle based direct runner to avoid pickling problems
    # with mocks.
    with beam.Pipeline(runner='BundleBasedDirectRunner') as p:
      _ = (
          p
          | beam.Create([{
              'columnA': 'value1', 'columnB': 'value2'
          }, {
              'columnA': 'value3', 'columnB': 'value4'
          }, {
              'columnA': 'value5', 'columnB': 'value6'
          }])
          | _StreamToBigQuery(
              table_reference='project:dataset.table',
              table_side_inputs=[],
              schema_side_inputs=[],
              schema='anyschema',
              batch_size=None,
              create_disposition='CREATE_NEVER',
              write_disposition=None,
              kms_key=None,
              retry_strategy=None,
              additional_bq_parameters=[],
              ignore_insert_ids=False,
              with_auto_sharding=False,
              test_client=client))

    with open(file_name_1) as f1, open(file_name_2) as f2:
      self.assertEqual(json.load(f1), json.load(f2))

  @parameterized.expand([
      param(with_auto_sharding=False),
      param(with_auto_sharding=True),
  ])
  def test_batch_size_with_auto_sharding(self, with_auto_sharding):
    tempdir = '%s%s' % (self._new_tempdir(), os.sep)
    file_name_1 = os.path.join(tempdir, 'file1')
    file_name_2 = os.path.join(tempdir, 'file2')

    def store_callback(arg):
      insert_ids = [r.insertId for r in arg.tableDataInsertAllRequest.rows]
      colA_values = [
          r.json.additionalProperties[0].value.string_value
          for r in arg.tableDataInsertAllRequest.rows
      ]
      json_output = {'insertIds': insert_ids, 'colA_values': colA_values}
      # Expect two batches of rows will be inserted. Store them separately.
      if not os.path.exists(file_name_1):
        with open(file_name_1, 'w') as f:
          json.dump(json_output, f)
      else:
        with open(file_name_2, 'w') as f:
          json.dump(json_output, f)

      res = mock.Mock()
      res.insertErrors = []
      return res

    client = mock.Mock()
    client.tabledata.InsertAll = mock.Mock(side_effect=store_callback)

    # Using the bundle based direct runner to avoid pickling problems
    # with mocks.
    with beam.Pipeline(runner='BundleBasedDirectRunner') as p:
      _ = (
          p
          | beam.Create([{
              'columnA': 'value1', 'columnB': 'value2'
          }, {
              'columnA': 'value3', 'columnB': 'value4'
          }, {
              'columnA': 'value5', 'columnB': 'value6'
          }])
          | _StreamToBigQuery(
              table_reference='project:dataset.table',
              table_side_inputs=[],
              schema_side_inputs=[],
              schema='anyschema',
              # Set a batch size such that the input elements will be inserted
              # in 2 batches.
              batch_size=2,
              create_disposition='CREATE_NEVER',
              write_disposition=None,
              kms_key=None,
              retry_strategy=None,
              additional_bq_parameters=[],
              ignore_insert_ids=False,
              with_auto_sharding=with_auto_sharding,
              test_client=client))

    with open(file_name_1) as f1, open(file_name_2) as f2:
      out1 = json.load(f1)
      self.assertEqual(out1['colA_values'], ['value1', 'value3'])
      out2 = json.load(f2)
      self.assertEqual(out2['colA_values'], ['value5'])


class BigQueryStreamingInsertTransformIntegrationTests(unittest.TestCase):
  BIG_QUERY_DATASET_ID = 'python_bq_streaming_inserts_'

  # Prevent nose from finding and running tests that were not
  # specified in the Gradle file.
  # See "More tests may be found" in:
  # https://nose.readthedocs.io/en/latest/doc_tests/test_multiprocess
  # /multiprocess.html#other-differences-in-test-running
  _multiprocess_can_split_ = True

  def setUp(self):
    self.test_pipeline = TestPipeline(is_integration_test=True)
    self.runner_name = type(self.test_pipeline.runner).__name__
    self.project = self.test_pipeline.get_option('project')

    self.dataset_id = '%s%s%d' % (
        self.BIG_QUERY_DATASET_ID,
        str(int(time.time())),
        random.randint(0, 10000))
    self.bigquery_client = bigquery_tools.BigQueryWrapper()
    self.bigquery_client.get_or_create_dataset(self.project, self.dataset_id)
    self.output_table = "%s.output_table" % (self.dataset_id)
    _LOGGER.info(
        "Created dataset %s in project %s", self.dataset_id, self.project)

  @attr('IT')
  def test_value_provider_transform(self):
    output_table_1 = '%s%s' % (self.output_table, 1)
    output_table_2 = '%s%s' % (self.output_table, 2)
    schema = {
        'fields': [{
            'name': 'name', 'type': 'STRING', 'mode': 'NULLABLE'
        }, {
            'name': 'language', 'type': 'STRING', 'mode': 'NULLABLE'
        }]
    }

    additional_bq_parameters = {
        'timePartitioning': {
            'type': 'DAY'
        },
        'clustering': {
            'fields': ['language']
        }
    }

    table_ref = bigquery_tools.parse_table_reference(output_table_1)
    table_ref2 = bigquery_tools.parse_table_reference(output_table_2)

    pipeline_verifiers = [
        BigQueryTableMatcher(
            project=self.project,
            dataset=table_ref.datasetId,
            table=table_ref.tableId,
            expected_properties=additional_bq_parameters),
        BigQueryTableMatcher(
            project=self.project,
            dataset=table_ref2.datasetId,
            table=table_ref2.tableId,
            expected_properties=additional_bq_parameters),
        BigqueryFullResultMatcher(
            project=self.project,
            query="SELECT name, language FROM %s" % output_table_1,
            data=[(d['name'], d['language']) for d in _ELEMENTS
                  if 'language' in d]),
        BigqueryFullResultMatcher(
            project=self.project,
            query="SELECT name, language FROM %s" % output_table_2,
            data=[(d['name'], d['language']) for d in _ELEMENTS
                  if 'language' in d])
    ]

    args = self.test_pipeline.get_full_options_as_args(
        on_success_matcher=hc.all_of(*pipeline_verifiers))

    with beam.Pipeline(argv=args) as p:
      input = p | beam.Create([row for row in _ELEMENTS if 'language' in row])

      _ = (
          input
          | "WriteWithMultipleDests" >> beam.io.gcp.bigquery.WriteToBigQuery(
              table=value_provider.StaticValueProvider(
                  str, '%s:%s' % (self.project, output_table_1)),
              schema=value_provider.StaticValueProvider(dict, schema),
              additional_bq_parameters=additional_bq_parameters,
              method='STREAMING_INSERTS'))
      _ = (
          input
          | "WriteWithMultipleDests2" >> beam.io.gcp.bigquery.WriteToBigQuery(
              table=value_provider.StaticValueProvider(
                  str, '%s:%s' % (self.project, output_table_2)),
              schema=beam.io.gcp.bigquery.SCHEMA_AUTODETECT,
              additional_bq_parameters=lambda _: additional_bq_parameters,
              method='FILE_LOADS'))

  @attr('IT')
  def test_multiple_destinations_transform(self):
    streaming = self.test_pipeline.options.view_as(StandardOptions).streaming
    if streaming and isinstance(self.test_pipeline.runner, TestDataflowRunner):
      self.skipTest("TestStream is not supported on TestDataflowRunner")

    output_table_1 = '%s%s' % (self.output_table, 1)
    output_table_2 = '%s%s' % (self.output_table, 2)

    full_output_table_1 = '%s:%s' % (self.project, output_table_1)
    full_output_table_2 = '%s:%s' % (self.project, output_table_2)

    schema1 = {
        'fields': [{
            'name': 'name', 'type': 'STRING', 'mode': 'NULLABLE'
        }, {
            'name': 'language', 'type': 'STRING', 'mode': 'NULLABLE'
        }]
    }
    schema2 = {
        'fields': [{
            'name': 'name', 'type': 'STRING', 'mode': 'NULLABLE'
        }, {
            'name': 'foundation', 'type': 'STRING', 'mode': 'NULLABLE'
        }]
    }

    bad_record = {'language': 1, 'manguage': 2}

    if streaming:
      pipeline_verifiers = [
          PipelineStateMatcher(PipelineState.RUNNING),
          BigqueryFullResultStreamingMatcher(
              project=self.project,
              query="SELECT name, language FROM %s" % output_table_1,
              data=[(d['name'], d['language']) for d in _ELEMENTS
                    if 'language' in d]),
          BigqueryFullResultStreamingMatcher(
              project=self.project,
              query="SELECT name, foundation FROM %s" % output_table_2,
              data=[(d['name'], d['foundation']) for d in _ELEMENTS
                    if 'foundation' in d])
      ]
    else:
      pipeline_verifiers = [
          BigqueryFullResultMatcher(
              project=self.project,
              query="SELECT name, language FROM %s" % output_table_1,
              data=[(d['name'], d['language']) for d in _ELEMENTS
                    if 'language' in d]),
          BigqueryFullResultMatcher(
              project=self.project,
              query="SELECT name, foundation FROM %s" % output_table_2,
              data=[(d['name'], d['foundation']) for d in _ELEMENTS
                    if 'foundation' in d])
      ]

    args = self.test_pipeline.get_full_options_as_args(
        on_success_matcher=hc.all_of(*pipeline_verifiers))

    with beam.Pipeline(argv=args) as p:
      if streaming:
        _SIZE = len(_ELEMENTS)
        test_stream = (
            TestStream().advance_watermark_to(0).add_elements(
                _ELEMENTS[:_SIZE // 2]).advance_watermark_to(100).add_elements(
                    _ELEMENTS[_SIZE // 2:]).advance_watermark_to_infinity())
        input = p | test_stream
      else:
        input = p | beam.Create(_ELEMENTS)

      schema_table_pcv = beam.pvalue.AsDict(
          p | "MakeSchemas" >> beam.Create([(full_output_table_1, schema1),
                                            (full_output_table_2, schema2)]))

      table_record_pcv = beam.pvalue.AsDict(
          p | "MakeTables" >> beam.Create([('table1', full_output_table_1),
                                           ('table2', full_output_table_2)]))

      input2 = p | "Broken record" >> beam.Create([bad_record])

      input = (input, input2) | beam.Flatten()

      r = (
          input
          | "WriteWithMultipleDests" >> beam.io.gcp.bigquery.WriteToBigQuery(
              table=lambda x,
              tables:
              (tables['table1'] if 'language' in x else tables['table2']),
              table_side_inputs=(table_record_pcv, ),
              schema=lambda dest,
              table_map: table_map.get(dest, None),
              schema_side_inputs=(schema_table_pcv, ),
              insert_retry_strategy=RetryStrategy.RETRY_ON_TRANSIENT_ERROR,
              method='STREAMING_INSERTS'))

      assert_that(
          r[beam.io.gcp.bigquery.BigQueryWriteFn.FAILED_ROWS],
          equal_to([(full_output_table_1, bad_record)]))

  def tearDown(self):
    request = bigquery.BigqueryDatasetsDeleteRequest(
        projectId=self.project, datasetId=self.dataset_id, deleteContents=True)
    try:
      _LOGGER.info(
          "Deleting dataset %s in project %s", self.dataset_id, self.project)
      self.bigquery_client.client.datasets.Delete(request)
    except HttpError:
      _LOGGER.debug(
          'Failed to clean up dataset %s in project %s',
          self.dataset_id,
          self.project)


@unittest.skipIf(HttpError is None, 'GCP dependencies are not installed')
class PubSubBigQueryIT(unittest.TestCase):

  INPUT_TOPIC = 'psit_topic_output'
  INPUT_SUB = 'psit_subscription_input'

  BIG_QUERY_DATASET_ID = 'python_pubsub_bq_'
  SCHEMA = {
      'fields': [{
          'name': 'number', 'type': 'INTEGER', 'mode': 'NULLABLE'
      }]
  }

  _SIZE = 4

  WAIT_UNTIL_FINISH_DURATION = 15 * 60 * 1000

  def setUp(self):
    # Set up PubSub
    self.test_pipeline = TestPipeline(is_integration_test=True)
    self.runner_name = type(self.test_pipeline.runner).__name__
    self.project = self.test_pipeline.get_option('project')
    self.uuid = str(uuid.uuid4())
    from google.cloud import pubsub
    self.pub_client = pubsub.PublisherClient()
    self.input_topic = self.pub_client.create_topic(
        self.pub_client.topic_path(self.project, self.INPUT_TOPIC + self.uuid))
    self.sub_client = pubsub.SubscriberClient()
    self.input_sub = self.sub_client.create_subscription(
        self.sub_client.subscription_path(
            self.project, self.INPUT_SUB + self.uuid),
        self.input_topic.name)

    # Set up BQ
    self.dataset_ref = utils.create_bq_dataset(
        self.project, self.BIG_QUERY_DATASET_ID)
    self.output_table = "%s.output_table" % (self.dataset_ref.dataset_id)

  def tearDown(self):
    # Tear down PubSub
    test_utils.cleanup_topics(self.pub_client, [self.input_topic])
    test_utils.cleanup_subscriptions(self.sub_client, [self.input_sub])
    # Tear down BigQuery
    utils.delete_bq_dataset(self.project, self.dataset_ref)

  def _run_pubsub_bq_pipeline(self, method, triggering_frequency=None):
    l = [i for i in range(self._SIZE)]

    matchers = [
        PipelineStateMatcher(PipelineState.RUNNING),
        BigqueryFullResultStreamingMatcher(
            project=self.project,
            query="SELECT number FROM %s" % self.output_table,
            data=[(i, ) for i in l])
    ]

    args = self.test_pipeline.get_full_options_as_args(
        on_success_matcher=hc.all_of(*matchers),
        wait_until_finish_duration=self.WAIT_UNTIL_FINISH_DURATION,
        streaming=True)

    def add_schema_info(element):
      yield {'number': element}

    messages = [str(i).encode('utf-8') for i in l]
    for message in messages:
      self.pub_client.publish(self.input_topic.name, message)

    with beam.Pipeline(argv=args) as p:
      mesages = (
          p
          | ReadFromPubSub(subscription=self.input_sub.name)
          | beam.ParDo(add_schema_info))
      _ = mesages | WriteToBigQuery(
          self.output_table,
          schema=self.SCHEMA,
          method=method,
          triggering_frequency=triggering_frequency)

  @attr('IT')
  def test_streaming_inserts(self):
    self._run_pubsub_bq_pipeline(WriteToBigQuery.Method.STREAMING_INSERTS)

  @attr('IT')
  def test_file_loads(self):
    self._run_pubsub_bq_pipeline(
        WriteToBigQuery.Method.FILE_LOADS, triggering_frequency=20)


class BigQueryFileLoadsIntegrationTests(unittest.TestCase):
  BIG_QUERY_DATASET_ID = 'python_bq_file_loads_'

  def setUp(self):
    self.test_pipeline = TestPipeline(is_integration_test=True)
    self.runner_name = type(self.test_pipeline.runner).__name__
    self.project = self.test_pipeline.get_option('project')

    self.dataset_id = '%s%s%s' % (
        self.BIG_QUERY_DATASET_ID,
        str(int(time.time())),
        random.randint(0, 10000))
    self.bigquery_client = bigquery_tools.BigQueryWrapper()
    self.bigquery_client.get_or_create_dataset(self.project, self.dataset_id)
    self.output_table = '%s.output_table' % (self.dataset_id)
    self.table_ref = bigquery_tools.parse_table_reference(self.output_table)
    _LOGGER.info(
        'Created dataset %s in project %s', self.dataset_id, self.project)

  @attr('IT')
  def test_avro_file_load(self):
    # Construct elements such that they can be written via Avro but not via
    # JSON. See BEAM-8841.
    from apache_beam.io.gcp import bigquery_file_loads
    old_max_files = bigquery_file_loads._MAXIMUM_SOURCE_URIS
    old_max_file_size = bigquery_file_loads._DEFAULT_MAX_FILE_SIZE
    bigquery_file_loads._MAXIMUM_SOURCE_URIS = 1
    bigquery_file_loads._DEFAULT_MAX_FILE_SIZE = 100
    elements = [
        {
            'name': u'Negative infinity',
            'value': -float('inf'),
            'timestamp': datetime.datetime(1970, 1, 1, tzinfo=pytz.utc),
        },
        {
            'name': u'Not a number',
            'value': float('nan'),
            'timestamp': datetime.datetime(2930, 12, 9, tzinfo=pytz.utc),
        },
    ]

    schema = beam.io.gcp.bigquery.WriteToBigQuery.get_dict_table_schema(
        bigquery.TableSchema(
            fields=[
                bigquery.TableFieldSchema(
                    name='name', type='STRING', mode='REQUIRED'),
                bigquery.TableFieldSchema(
                    name='value', type='FLOAT', mode='REQUIRED'),
                bigquery.TableFieldSchema(
                    name='timestamp', type='TIMESTAMP', mode='REQUIRED'),
            ]))

    pipeline_verifiers = [
        # Some gymnastics here to avoid comparing NaN since NaN is not equal to
        # anything, including itself.
        BigqueryFullResultMatcher(
            project=self.project,
            query="SELECT name, value, timestamp FROM {} WHERE value<0".format(
                self.output_table),
            data=[(d['name'], d['value'], d['timestamp'])
                  for d in elements[:1]],
        ),
        BigqueryFullResultMatcher(
            project=self.project,
            query="SELECT name, timestamp FROM {}".format(self.output_table),
            data=[(d['name'], d['timestamp']) for d in elements],
        ),
    ]

    args = self.test_pipeline.get_full_options_as_args(
        on_success_matcher=hc.all_of(*pipeline_verifiers),
    )

    with beam.Pipeline(argv=args) as p:
      input = p | 'CreateInput' >> beam.Create(elements)
      schema_pc = p | 'CreateSchema' >> beam.Create([schema])

      _ = (
          input
          | 'WriteToBigQuery' >> beam.io.gcp.bigquery.WriteToBigQuery(
              table='%s:%s' % (self.project, self.output_table),
              schema=lambda _,
              schema: schema,
              schema_side_inputs=(beam.pvalue.AsSingleton(schema_pc), ),
              method='FILE_LOADS',
              temp_file_format=bigquery_tools.FileFormat.AVRO,
          ))
    bigquery_file_loads._MAXIMUM_SOURCE_URIS = old_max_files
    bigquery_file_loads._DEFAULT_MAX_FILE_SIZE = old_max_file_size

  def tearDown(self):
    request = bigquery.BigqueryDatasetsDeleteRequest(
        projectId=self.project, datasetId=self.dataset_id, deleteContents=True)
    try:
      _LOGGER.info(
          "Deleting dataset %s in project %s", self.dataset_id, self.project)
      self.bigquery_client.client.datasets.Delete(request)
    except HttpError:
      _LOGGER.debug(
          'Failed to clean up dataset %s in project %s',
          self.dataset_id,
          self.project)


if __name__ == '__main__':
  logging.getLogger().setLevel(logging.INFO)
  unittest.main()
