People who know the automotive electronics industry , In recent years, I may often see a word “SOA”, that SOA What is it ？ What should a tester test ？ This article will briefly introduce you .

01 SOA What is it? ？

SOA（Service Oriented Architecture） It's a service-oriented architecture , First applied to IT industry , Although in the industry SOA There is no unified description of the definition of , But overall ,SOA Define functions as services , Services have explicit callable interfaces , And can be called through the network .

In the field of automobiles , For high-performance computing platforms , In order to realize the interconnection and separation of hardware and software between domain controllers and regional controllers 、 Shorten the development cycle and other advantages , It has also been introduced. SOA The concept of , and SOME/IP(Scalable service-Oriented MiddlewarE over IP) The agreement is It is realized in the automotive field SOA A commonly used middleware protocol .

02 SOME/IP Communication mechanism of service

A service is a method or function that implements a function , be based on C/S Architecture can be divided into server（ service provider ） and client（ Service consumer ）, Describe the service and its content through the service interface , The interface type and communication mechanism are as follows ：

Method：Client To the end Server The client sends a request message

· RR-Method——Server End reply response message

· FF-Method——Server The end does not reply to the response message

RR-Method

(Request/Response)

FF-Method

(Fire&Forget)

Event：Client End subscribe to a service ,Server The client publishes the service

Event

Field：

· Setter/Getter——Client End request get / Set a property / state

· Notifier——Client End subscribe to a certain attribute / Post state ,Server The client publishes the service , The release conditions are the same as Event, The difference is that after subscription Server The client will immediately send this Field The content of

Get/Set Field

Notifier Field

03  SOA Service test content and environment construction

SOME/IP The bottom layer of the protocol is realized through Ethernet , be based on service The calling process of services between controllers , And based on service Controller and signal based (signal) The transmission of information between controllers , All need to be verified in the process of software development , General division 5 Three aspects of testing SOA Performance of .

SD test ： Service subscription / Release tests

Interface and parameter testing ： Test each of the services Interface, as well as Interface The corresponding parameter

A functional test ： Test specific inputs / In the scene SOA Function output

Pressure test ： Multiple clients call the test of a service at the same time

The system test ： Nested invocation of services

Conduct SOA The test should first be able to work with DUT Establish communication （CAN(FD)/LIN/ Ethernet ）, Can control DUT Power on and off and wake up , You can refer to the following test topology to monitor DUT Communication of , At the same time, it simulates the traditional CAN(FD)/LIN Network nodes , And the service client/server And DUT Establishing a connection , test DUT Realization SOME/IP Status of the service .

04  SOA Service interface testing

Now? , Explain through an example SOA Content and method of interface test .

First , Need to provide the requirement specification of service interface 、 Service matrix (Ethernet Matrix)、 Service database (Arxml), If it involves S2S（service to signal） The interface of , Also provide relevant CAN(FD)/LIN Database files .

Test requirements

With BodyDoorLock Service RR method Interface LockReq For example ,DUT As server,Tester simulation client. The interface contains two request parameters （Source,Req）, And a response parameter （Result）.

Test specifications

Design test cases according to the description of the requirements specification , Test cases need to cover the communication mechanism of the interface , Interface parameter values and S2S. You can refer to mind mapping to analyze requirements , And design test cases .

Test Engineering

First , To be in CANoe Add... To the project SOME/IP Database files , stay CANoe Interface Click “Simulation > System and Communication Setup > Import Data Source > Select corresponding Arxml file > Finish”.

And then in “System Explorer” in , binding BodyDoorLock by SOME/IP service .

CANoe After the project is imported into the corresponding database , Can follow DUT Automatically establish service publishing and subscription , You can also automatically parse the parameters of the service interface . Test engineers do not need to consider the implementation of the underlying logic , Service discovery （Service Discovery） And serialization , Just consider the use of the interface layer .

How to be in CAPL The script implements the call of the interface and the check of the response parameters , You can refer to vector An example of , The development test script is as follows , Yes CAN The signal inspection will not be repeated .

05  matters needing attention

During the whole test process , There will be some testing problems more or less , Here is a simple summary based on common problems ：

Tips1 

client and server The correspondence has been sent find service and offer service, however CANoe and DUT Service subscription cannot be automatically completed between ？

►  This should be done in log in Check IP Address 、MAC Address 、VLAN、ServiceID、InstanceID、MajorVersion、MinorVersion、TP Port etc. Whether the parameters are consistent with the defined service , If not, it can be in “Edit System Data > Model Editor” Modify these parameters . It can also be in Model Editor Modify the interface parameters of the service , Subscription relationship, etc .

Tips2

When the parameter sent by the simulation is an array of indefinite length ,canoe Failed to send message ？

►  When sending an array with an indefinite length, you need to define the length of the array first .

Tips3

When defining parameter names key,message And so on canoe Keywords used , When calling this parameter ,CANoe Report errors ？

►  If you find that the parameters in the database contain these keywords , Can be in Model Editor Modify the name of the parameter , Call again .

That's all SOA The main content of the test , Limited space , I won't go into more details , If you have other questions , Welcome message discussion ！