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test_lambda_runtime_client.py
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"""
Copyright 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
"""
import http
import http.client
import unittest.mock
from unittest.mock import MagicMock, patch
from awslambdaric import __version__
from awslambdaric.lambda_runtime_client import (
LambdaRuntimeClient,
LambdaRuntimeClientError,
InvocationRequest,
_user_agent,
)
class TestInvocationRequest(unittest.TestCase):
def test_constructor(self):
invocation_request = InvocationRequest(
invoke_id="Lambda-Runtime-Aws-Request-Id",
x_amzn_trace_id="Lambda-Runtime-Trace-Id",
invoked_function_arn="Lambda-Runtime-Invoked-Function-Arn",
deadline_time_in_ms="Lambda-Runtime-Deadline-Ms",
client_context="Lambda-Runtime-Client-Context",
cognito_identity="Lambda-Runtime-Cognito-Identity",
content_type="Content-Type",
event_body="response_body",
)
equal_invocation_request = InvocationRequest(
invoke_id="Lambda-Runtime-Aws-Request-Id",
x_amzn_trace_id="Lambda-Runtime-Trace-Id",
invoked_function_arn="Lambda-Runtime-Invoked-Function-Arn",
deadline_time_in_ms="Lambda-Runtime-Deadline-Ms",
client_context="Lambda-Runtime-Client-Context",
cognito_identity="Lambda-Runtime-Cognito-Identity",
content_type="Content-Type",
event_body="response_body",
)
different_invocation_request = InvocationRequest(
invoke_id="Lambda-Runtime-Aws-Request-Id",
x_amzn_trace_id="Lambda-Runtime-Trace-Id",
invoked_function_arn="Lambda-Runtime-Invoked-Function-Arn",
deadline_time_in_ms="Lambda-Runtime-Deadline-Ms",
client_context="Lambda-Runtime-Client-Context",
cognito_identity="Lambda-Runtime-Cognito-Identity",
content_type="Content-Type",
event_body="another_response_body",
)
self.assertTrue(invocation_request == invocation_request)
self.assertTrue(invocation_request == equal_invocation_request)
self.assertFalse(invocation_request == different_invocation_request)
class TestLambdaRuntime(unittest.TestCase):
@patch("awslambdaric.lambda_runtime_client.runtime_client")
def test_wait_next_invocation(self, mock_runtime_client):
response_body = b"{}"
headears = {
"Lambda-Runtime-Aws-Request-Id": "RID1234",
"Lambda-Runtime-Trace-Id": "TID1234",
"Lambda-Runtime-Invoked-Function-Arn": "FARN1234",
"Lambda-Runtime-Deadline-Ms": 12,
"Lambda-Runtime-Client-Context": "client_context",
"Lambda-Runtime-Cognito-Identity": "cognito_identity",
"Content-Type": "application/json",
}
mock_runtime_client.next.return_value = response_body, headears
runtime_client = LambdaRuntimeClient("localhost:1234")
event_request = runtime_client.wait_next_invocation()
self.assertIsNotNone(event_request)
self.assertEqual(event_request.invoke_id, "RID1234")
self.assertEqual(event_request.x_amzn_trace_id, "TID1234")
self.assertEqual(event_request.invoked_function_arn, "FARN1234")
self.assertEqual(event_request.deadline_time_in_ms, 12)
self.assertEqual(event_request.client_context, "client_context")
self.assertEqual(event_request.cognito_identity, "cognito_identity")
self.assertEqual(event_request.content_type, "application/json")
self.assertEqual(event_request.event_body, response_body)
@patch("http.client.HTTPConnection", autospec=http.client.HTTPConnection)
def test_post_init_error(self, MockHTTPConnection):
mock_conn = MockHTTPConnection.return_value
mock_response = MagicMock(autospec=http.client.HTTPResponse)
mock_conn.getresponse.return_value = mock_response
mock_response.read.return_value = b""
mock_response.code = http.HTTPStatus.ACCEPTED
runtime_client = LambdaRuntimeClient("localhost:1234")
runtime_client.post_init_error("error_data")
MockHTTPConnection.assert_called_with("localhost:1234")
mock_conn.request.assert_called_once_with(
"POST", "/2018-06-01/runtime/init/error", "error_data"
)
mock_response.read.assert_called_once()
@patch("http.client.HTTPConnection", autospec=http.client.HTTPConnection)
def test_post_init_error_non_accepted_status_code(self, MockHTTPConnection):
mock_conn = MockHTTPConnection.return_value
mock_response = MagicMock(autospec=http.client.HTTPResponse)
mock_conn.getresponse.return_value = mock_response
mock_response.read.return_value = b""
mock_response.code = http.HTTPStatus.IM_USED
runtime_client = LambdaRuntimeClient("localhost:1234")
with self.assertRaises(LambdaRuntimeClientError) as cm:
runtime_client.post_init_error("error_data")
returned_exception = cm.exception
self.assertEqual(returned_exception.endpoint, "/2018-06-01/runtime/init/error")
self.assertEqual(returned_exception.response_code, http.HTTPStatus.IM_USED)
@patch("awslambdaric.lambda_runtime_client.runtime_client")
def test_post_invocation_result(self, mock_runtime_client):
runtime_client = LambdaRuntimeClient("localhost:1234")
response_data = "data"
invoke_id = "1234"
runtime_client.post_invocation_result(invoke_id, response_data)
mock_runtime_client.post_invocation_result.assert_called_once_with(
invoke_id, response_data.encode("utf-8"), "application/json"
)
@patch("awslambdaric.lambda_runtime_client.runtime_client")
def test_post_invocation_result_binary_data(self, mock_runtime_client):
runtime_client = LambdaRuntimeClient("localhost:1234")
response_data = b"binary_data"
invoke_id = "1234"
content_type = "application/octet-stream"
runtime_client.post_invocation_result(invoke_id, response_data, content_type)
mock_runtime_client.post_invocation_result.assert_called_once_with(
invoke_id, response_data, content_type
)
@patch("awslambdaric.lambda_runtime_client.runtime_client")
def test_post_invocation_result_failure(self, mock_runtime_client):
runtime_client = LambdaRuntimeClient("localhost:1234")
response_data = "data"
invoke_id = "1234"
mock_runtime_client.post_invocation_result.side_effect = RuntimeError(
"Failed to post invocation response"
)
with self.assertRaisesRegex(RuntimeError, "Failed to post invocation response"):
runtime_client.post_invocation_result(invoke_id, response_data)
@patch("awslambdaric.lambda_runtime_client.runtime_client")
def test_post_invocation_error(self, mock_runtime_client):
runtime_client = LambdaRuntimeClient("localhost:1234")
error_data = "data"
invoke_id = "1234"
xray_fault = "xray_fault"
runtime_client.post_invocation_error(invoke_id, error_data, xray_fault)
mock_runtime_client.post_error.assert_called_once_with(
invoke_id, error_data, xray_fault
)
@patch("awslambdaric.lambda_runtime_client.runtime_client")
def test_post_invocation_error_with_large_xray_cause(self, mock_runtime_client):
runtime_client = LambdaRuntimeClient("localhost:1234")
error_data = "data"
invoke_id = "1234"
large_xray_fault = ("a" * int(1024 * 1024))[:-1]
runtime_client.post_invocation_error(invoke_id, error_data, large_xray_fault)
mock_runtime_client.post_error.assert_called_once_with(
invoke_id, error_data, large_xray_fault
)
@patch("awslambdaric.lambda_runtime_client.runtime_client")
def test_post_invocation_error_with_too_large_xray_cause(self, mock_runtime_client):
runtime_client = LambdaRuntimeClient("localhost:1234")
error_data = "data"
invoke_id = "1234"
too_large_xray_fault = "a" * int(1024 * 1024)
runtime_client.post_invocation_error(
invoke_id, error_data, too_large_xray_fault
)
mock_runtime_client.post_error.assert_called_once_with(
invoke_id, error_data, ""
)
def test_connection_refused(self):
with self.assertRaises(ConnectionRefusedError):
runtime_client = LambdaRuntimeClient("127.0.0.1:1")
runtime_client.post_init_error("error")
def test_invalid_addr(self):
with self.assertRaises(OSError):
runtime_client = LambdaRuntimeClient("::::")
runtime_client.post_init_error("error")
def test_lambdaric_version(self):
self.assertTrue(_user_agent().endswith(__version__))
class TestLambdaRuntimeClientError(unittest.TestCase):
def test_constructor(self):
expected_endpoint = ""
expected_response_code = ""
expected_response_body = ""
lambda_runtime_client_error = LambdaRuntimeClientError(
expected_endpoint, expected_response_code, expected_response_body
)
self.assertIsInstance(lambda_runtime_client_error, Exception)
self.assertEqual(lambda_runtime_client_error.endpoint, expected_endpoint)
if __name__ == "__main__":
unittest.main()