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

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

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

System testing SUT

System testing SUT

System testing SUT

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

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

An Introduction to Early Developer Testing Never too early to test: An Introduction to Early Developer Testing

MSLogic Unit testing History UI MSLogic History UI Storage Storage

MSLogic Unit testing History UI MSLogic History UI Storage Storage

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

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

Testing frameworks String item = msLogic.getItem(1); if(!item.equals(“Item1”) print(“Case 1 failed”); … Testing frameworks assertEquals(msLogic.getItem(1), “Item1”); JUnit

Unit testing Developer testing Automated A type of UI History MSLogic Storage Developer testing A type of

Test-Driven Development (TDD) SUT

Test-Driven Development (TDD) Write a failing test Write code to pass test

CityConnectTest.java CityConnect.java

CityConnectTest.java CityConnect.java

Write the java code for the above CityConnectTest.java CityConnect.java We want have this. Clementi  true Novena  true Eunos  true Changi  false Clementi, Eunos, 20 Eunos, Novena, 40 Write the java code for the above

CityConnectTest.java CityConnect.java Rule 1/3: Do not write functional code unless there is a failing test case.

CityConnectTest.java CityConnect.java

CityConnectTest.java CityConnect.java Rule 2/3: Write minimal code to pass the test cases.

CityConnectTest.java CityConnect.java Rule: No more test code than is necessary to fail.

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. CityConnect.java Refactor as necessary.

Test-Driven Development (TDD) Write a failing test Write code to pass test

[Extra] who wants maximum publicity When the system test fails... Do you want maximum publicity for your mistakes?

Must have automated developer tests!

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