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How long will they take to catch all fish? a)Less than 1 hour b)Around 1 hour c)About 100 hours d)Forever [Extra] 100 fish If 100 people trying to catch 100 piranha fish in a lake. On average, one person can catch one fish within 1 hour

[Extra] 100 fish

System testing SUT

System testing SUT

System testing SUT

Do you want maximum publicity for your mistakes? [Extra] who wants maximum publicity

Do you want maximum publicity for your mistakes?

Never too early to test: An Introduction to Early Developer Testing CS2103/T, Lecture 4, Part 2, [Sep 4, 2015]

UI MSLogic Storage History UI MSLogic Storage History

UI MSLogic Storage History UI MSLogic Storage History

UI MSLogic Storage History SUT Unit testing

UI MSLogic Storage History SUT Unit testing

UI MSLogic Storage History SUT Stub Test Driver Unit testing

UI MSLogic Storage History SUT== MSLogic Stub String retrieveFromDatabase (int key){ if(key==1) return “Item for key 1”; if(key==2) return “Item for key 2”; … Unit testing

UI MSLogic Storage History SUT== MSLogic Stub Test Driver String item = msLogic.getItem(1); if(!item.equals(“Item1”) print(“Case 1 failed”); … Unit testing

UI MSLogic Storage History SUT== MSLogic Stub Test Driver String item = msLogic.getItem(1); if(!item.equals(“Item1”) print(“Case 1 failed”); … Unit testing

String item = msLogic.getItem(1); if(!item.equals(“Item1”) print(“Case 1 failed”); … assertEquals(msLogic.getItem(1), “Item1”); JUnit (Java) Visual Studio Native Tests (C++)

UI MSLogic Storage History

UI MSLogic Storage History

UI MSLogic Storage History

UI MSLogic Storage History

UI MSLogic Storage History

UI MSLogic Storage History

SUT

Write a failing test Write code to pass test

CityConnect.java CityConnectTest.java

CityConnect.java CityConnectTest.java

CityConnect.java CityConnectTest.java Clementi, Eunos, 20 Eunos, Novena, 40 Clementi  true Novena  true Eunos  true Changi  false Write the java/c++/pseudo code for the above

CityConnect.java CityConnectTest.java

CityConnect.java CityConnectTest.java

CityConnect.java CityConnectTest.java

CityConnect.java CityConnectTest.java

CityConnect.java CityConnectTest.java

CityConnect.java CityConnectTest.java

CityConnect.java CityConnectTest.java

CityConnect.java CityConnectTest.java

CityConnect.java CityConnectTest.java

CityConnect.java CityConnectTest.java

CityConnect.java CityConnectTest.java

CityConnect.java CityConnectTest.java

CityConnect.java CityConnectTest.java

CityConnect.java CityConnectTest.java

CityConnect.java CityConnectTest.java

CityConnect.java CityConnectTest.java

CityConnect.java CityConnectTest.java

CityConnect.java CityConnectTest.java Note: more test cases required. Refactor as necessary.

Write a failing test Write code to pass test

100+ developers 300,000 Lines of Code

Automated tests

[extra] Mozilla patch policy 58

When the system test fails...

Must have automated developer tests!

Only system testing? NO It can save your career. Use automated test driver frameworks Can do in TDD fashion Must do developer testing

Should do this too Everyone should do some Use these Do in CE2, Optional in project