Call In

The following examples assume that the test expectations object t has been created:

with doppel.TestExpectations() as t:

To call into the code under test:

t.call(examples.fn1)

To call into the code under test with args:

t.call(examples.fn2).args('arg1', 'arg2', arg3='arg3', arg4='arg4')

To not verify the return value:

t.call(examples.fn1)

To verify the return value as a literal:

t.call(examples.fn1).returns('fn1 called')

To verify the return value using a function:

def verify_fn(result):
    return result == 'fn1 called'
t.call(examples.get_string).returns(verify_fn)

Call Out

The following examples assume that fn_replaced has been replaced:

class TestExamples(doppel.TestCaseReplacing('examples.fn_replaced')):

Further, they assume that the test expectations object t has been created and that the code under test has been called:

with doppel.TestExpectations() as t:
    t.call(examples.fn3).args('arg1', 'arg2', arg3='arg3', arg4='arg4')

To expect a call out with args not verified:

examples.fn_replaced()

To expect a call out with args verified as a literal:

examples.fn_replaced('arg1', 'arg2', arg3='arg3', arg4='arg4')

To expect a call out with args verified using a function:

def verify_fn(*args, **kwargs):
    return args == ('arg1', 'arg2') and kwargs == {'arg3': 'arg3', 'arg4': 'arg4'}
examples.fn_replaced(verify_fn)

To return a doppel:

examples.fn_replaced()

To return a literal:

examples.fn_replaced().returns('ret1')

To return a value supplied by a function:

def returns_fn():
    return 'ret1'
examples.fn_replaced().returns(returns_fn)

To raise an exception:

examples.fn_replaced().raises(Exception('exception1'))