Exception Handling In Android Unit Test Case

Question

I am doing Android Unit Test Case Execution and for Negative Test Case I should get exception, but for some API's Exception is not caught.

Please do find the example below:

public void testInsertSenderType_n() { DBSms obj = new DBSms(getContext()); obj.open(); int i =0; int a =0; boolean result = true; i=obj.GetToatlCount(); obj.insertSmsText(i+1,"Hello to testInsertSenderType_n"); a=obj.TotalcountSms("Inbox"); try { obj.insertSenderType(-100, "Richard", "Inbox", 0); } catch (Exception e) { // TODO: handle exception result = false; } assertEquals(a,obj.TotalcountSms("Inbox")); assertEquals(false,result); obj.close(); }

Here in, obj.insertSenderType(-100, "Richard", "Inbox", 0); should throw an exception. But it is not thrown.

Please do guide where can I be Wrong.

So, the method should throw an exception, and the unit test shows that it's not the case, is that right? If so, congratulations: you've just discovered a bug in the code of DBSms thanks to your unit tests. Fix it and check that the unit test passes once the fix is applied. — JB Nizet
– JB Nizet, Commented Dec 22, 2011 at 7:46

Konstantin Pribluda · Accepted Answer · 2011-12-22 07:43:09Z

I use following method to expect proper exception:

try { doSomethingToProvokeException(); fail("there ought to be an exception dude, but was not"); } catch(ExeptionIHaveProvoked ex) { doAssertionnsonThrowsException }

You do not need variables to keeps exception state. As for why no exception is thrown in your code - nobody cann tell it to you, unless you provide source of object.

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