AWS supports the following Ruby runtimes:

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Name | Identifier | SDK for Ruby | Operating system
-- | -- | -- | --
Ruby 2.7 | ruby2.7 | 3.0.1 | Amazon Linux 2
Ruby 2.5 | ruby2.5 | 3.0.1 | Amazon Linux

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Currently, `localstack/lambda` only contains the `ruby2.5` tag. Will the 2.7 runtime be supported in the (near) future?
result = self.lambda_client.invoke(
            FunctionName=TEST_LAMBDA_NAME_JAVA, InvocationType='Event',
            Payload=b'{"Records": [{"dynamodb": {"Message": "{}"}}]}')
        self.assertEqual(result['StatusCode'], 202)
    def test_kinesis_invocation(self):
        payload = b'{"Records": [{"kinesis": {"data": "dGVzdA==", "partitionKey": "partition"}}]}'
        result = self.lambda_client.invoke(FunctionName=TEST_LAMBDA_NAME_JAVA_KINESIS, Payload=payload)
        result_data = result['Payload'].read()
        self.assertEqual(result['StatusCode'], 200)
        self.assertEqual(to_str(result_data).strip(), '"test "')
    def test_kinesis_event(self):
        result = self.lambda_client.invoke(
            FunctionName=TEST_LAMBDA_NAME_JAVA, InvocationType='Event',
            Payload=b'{"Records": [{"Kinesis": {"Data": "data", "PartitionKey": "partition"}}]}')
        result_data = result['Payload'].read()
        self.assertEqual(result['StatusCode'], 202)
        self.assertEqual(to_str(result_data).strip(), '')
    def test_stream_handler(self):
        result = self.lambda_client.invoke(
            FunctionName=TEST_LAMBDA_NAME_JAVA_STREAM, Payload=b'{}')
        result_data = result['Payload'].read()
        self.assertEqual(result['StatusCode'], 200)
        self.assertEqual(to_str(result_data).strip(), '{}')
    def test_serializable_input_object(self):
        result = self.lambda_client.invoke(
            FunctionName=TEST_LAMBDA_NAME_JAVA_SERIALIZABLE,
            Payload=b'{"bucket": "test_bucket", "key": "test_key"}')
        result_data = result['Payload'].read()
        self.assertEqual(result['StatusCode'], 200)
        self.assertDictEqual(