Elevator dispatching (pairing project) ④

One 、 software test

1.1 unit testing

In the development process , In order to reduce the logic error in the function, the program will bug Probability , We use JUnit3 Unit test the functions of some classes . The functions for unit testing include GetPeopleIn(), GetPeopleOut(), HasPeopleOut(), GetNearestPsg(), GetMaxFloorPsg() etc. . Here is one of the tests

public void testGetMaxFloorPsg()
    {
    
        EleController controller = new EleController();
        Passenger passenger1 = new Passenger(100, 2, 6, 1, 1);
        Passenger passenger2 = new Passenger(100, 1, 8, 2, 1);
        Passenger passenger3 = new Passenger(40, 8, 1, 3, -1);
        List<Passenger> passengers = new LinkedList<>();
        passengers.add(passenger1);
        passengers.add(passenger2);
        passengers.add(passenger3);
        controller.setPsgRequestList(passengers);

        assertEquals(8, controller.getMaxFloorPsg(1, 1, 1));

        passengers.remove(0);
        controller.setPsgRequestList(passengers);

        assertEquals(2, controller.getMaxFloorPsg(1, 1, 1));

        passengers.remove(0);
        controller.setPsgRequestList(passengers);

        assertEquals(1, controller.getMaxFloorPsg(1, 1, 1));
    }

The test results are shown in the figure

1.2 Black box testing

Here is 10 Test cases

The test case	describe
No input	The elevator operates normally
weight 70 Starting floor 1 Terminal floor 10	The elevator receives passengers normally
weight 100*5 people	Elevator receives passengers normally in case of multiple requests
weight 100*5 people The elevator 2 individual	Pick up passengers normally when there are many elevators
weight 100*10 people	Unable to pick up passengers when overweight
Starting floor -2	The starting floor is illegal
Terminal floor 21	The terminal floor is illegal
Starting floor 1 Terminal floor -1	In the passenger carrying state, the elevator does not pick up passengers in the opposite direction of its own operation
Starting floor 1 Key floors -1	No passengers sstf The algorithm changes from uplink to downlink
Change any legal elevator parameters	The elevator parameters can be changed and run smoothly

Two 、 Performance comparison

Because passengers are randomly generated , The values are not necessarily consistent .

The evaluation standard is that the total number of people reaches 50 Number of people served per hour / The total number of

Bus:0.3

SSTF:0.48

LOOK:0.34

3、 ... and 、 Pairing project summary

2.1 The advantages of pair programming

Through pair programming , Developers can urge and encourage each other . meanwhile , The fields that two people are good at can also complement each other , When one of the developers encountered a difficult point , You can also ask another person , This saves development time , Improved development efficiency .
However , Pair programming also has some disadvantages . When the code styles of two developers are not unified , It's easy to find it difficult to understand each other's code , And then affect further development . meanwhile , If the content that a person is responsible for himself appears bug Not familiar enough , It will also lead to other bug.

2.2 Personal strengths and weaknesses

Deng Shengyu
advantage ： Involved in Java Language project development , Familiar with the development process . Good code habits .
shortcoming ： Procrastination is too serious , Delay the development process .

Cui Wenguang ：
advantage ： Strong ability to collect data . Good at communication , Fast programming speed, clear thinking , No drag .
shortcoming ： Not familiar with multi-threaded development .

2.3 Pairing process

As the development period coincides with the winter vacation , Cuiwenguang and I cannot meet offline , Therefore, online communication is adopted to complete the project development . We are 1 month 27 Finish the discussion on the day , Determine and start the development process . Due to git I'm not familiar with , The initial progress was not submitted to the warehouse on time , Instead, it was used after the medium-term code volume gradually increased git Project management .
In pair development , I finished the definition of the first stage class , And basically completed the second stage bus Scheduling algorithm . Cuiwenguang has improved bus Scheduling algorithm , And completed sstf、look Scheduling algorithm and ui Interface development . meanwhile , I am right. ui The interface logic has been adjusted and improved , Unit test is carried out . Besides , We worked together to complete the writing of blogs and documents .
Because you can only communicate online , We can't provide the offline version of the pair photos they are discussing , So I took a screenshot of the online pairing discussion process and recorded it as follows .

2.4 Technical highlights and difficulties

Technical highlights

• Support real-time display of various information
• The algorithm is efficient

Technical key points

• Using multithreading technology , Prevent the process from crashing
• A lot of unit tests are used , Improve code robustness

Technical difficulties encountered

• Process creation problem
• Synchronization function problem

To be improved

• The interface is chaotic
• The function still needs to be improved
• The front end style can be further beautified

2.5 Other gains

Through this pairing project , I realized that procrastination is a terrible bad habit , It will seriously affect the progress of cooperative development . meanwhile , My ability to collect data has also been improved , Yes java Object oriented design 、 Multithreading 、 The understanding of unit testing has been deepened . On the whole , It has benefited me a lot .