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Copy pathtest_handler.py
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72 lines (57 loc) · 2.71 KB
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import os
import sys
import unittest
from unittest.mock import patch
from tests.utils import get_mock_context
class TestHandler(unittest.TestCase):
def tearDown(self):
for mod in sys.modules.copy():
if mod.startswith("datadog_lambda.handler"):
del sys.modules[mod]
def test_dd_lambda_handler_env_var_none(self):
with self.assertRaises(Exception) as context:
import datadog_lambda.handler as handler
assert context.exception == handler.HandlerError(
"DD_LAMBDA_HANDLER is not defined. Can't use prebuilt datadog handler"
)
@patch.dict(os.environ, {"DD_LAMBDA_HANDLER": "malformed"}, clear=True)
def test_dd_lambda_handler_env_var_malformed(self):
with self.assertRaises(Exception) as context:
import datadog_lambda.handler as handler
assert context.exception == handler.HandlerError(
"Value malformed for DD_LAMBDA_HANDLER has invalid format."
)
@patch.dict(os.environ, {"DD_LAMBDA_HANDLER": "nonsense.nonsense"}, clear=True)
@patch("datadog_lambda.tracing.emit_telemetry_on_exception_outside_of_handler")
@patch("time.time_ns", return_value=42)
def test_exception_importing_module(self, mock_time, mock_emit_telemetry):
with self.assertRaises(ModuleNotFoundError) as test_context:
import datadog_lambda.handler
mock_emit_telemetry.assert_called_once_with(
test_context.exception, "nonsense", 42
)
@patch.dict(os.environ, {"DD_LAMBDA_HANDLER": "nonsense.nonsense"}, clear=True)
@patch("importlib.import_module", return_value=None)
@patch("datadog_lambda.tracing.emit_telemetry_on_exception_outside_of_handler")
@patch("time.time_ns", return_value=42)
def test_exception_getting_handler_func(
self, mock_time, mock_emit_telemetry, mock_import
):
with self.assertRaises(AttributeError) as test_context:
import datadog_lambda.handler
mock_emit_telemetry.assert_called_once_with(
test_context.exception, "nonsense", 42
)
@patch.dict(os.environ, {"DD_LAMBDA_HANDLER": "nonsense.nonsense"}, clear=True)
@patch("importlib.import_module")
@patch("datadog_lambda.tracing.emit_telemetry_on_exception_outside_of_handler")
@patch("datadog_lambda.wrapper.datadog_lambda_wrapper")
def test_handler_success(
self, mock_lambda_wrapper, mock_emit_telemetry, mock_import
):
def nonsense():
pass
mock_import.nonsense.return_value = nonsense
import datadog_lambda.handler
mock_emit_telemetry.assert_not_called()
mock_lambda_wrapper.assert_called_once_with(mock_import().nonsense)