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import pytest
import re

from tests.common.custom_cluster_test_suite import CustomClusterTestSuite
from tests.util.filesystem_utils import get_fs_path
from tests.util.parse_util import parse_duration_string_ms


class TestObservability(CustomClusterTestSuite):
  @classmethod
  def get_workload(self):
    return 'functional-query'

  @pytest.mark.execute_serially
  def test_host_profile_jvm_gc_metrics(self, unique_database):
    self.execute_query_expect_success(self.client,
        "create function {0}.gc(int) returns int location '{1}' \
        symbol='org.apache.impala.JavaGcUdfTest'".format(
            unique_database, get_fs_path('/test-warehouse/impala-hive-udfs.jar')))
    profile = self.execute_query_expect_success(self.client,
        "select {0}.gc(int_col) from functional.alltypes limit 1000".format(
            unique_database)).runtime_profile

    gc_count_regex = "GcCount:.*\((.*)\)"
    gc_count_match = re.search(gc_count_regex, profile)
    assert gc_count_match, profile
    assert int(gc_count_match.group(1)) > 0, profile

    gc_time_millis_regex = "GcTimeMillis: (.*)"
    gc_time_millis_match = re.search(gc_time_millis_regex, profile)
    assert gc_time_millis_match, profile
    assert parse_duration_string_ms(gc_time_millis_match.group(1)) > 0