Forcing Failure

How will your program react if, say, the database connection fails?

Force a failure in your test and see what happens.

• This might involve setting a global

• Or maybe replacing a function

use DBI;
{
    local *DBI::connect = sub {
        return 0;
    };

    ...test for graceful failure here...
}

...test for graceful recovery here...

• Or maybe mocking a DBI object

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