- Anonymous
- Sunday, February 25th, 2007 at 11:11:06am MST
- Mock object implementation.
- This mock object implementation is meant to be very forgiving - it returns a
- new child Mock Object for every attribute accessed, and a mock object is
- returned from every method call.
- It is the tester's job to enabled the calls that they are interested in
- testing, all calls where the return value of the call and side effects are not
- recorded (logging, for example) are likely to succeed w/o effort.
- If you wish to call the actual implementation of a function on a MockObject,
- you have to enable it using enableMethod. If you wish to use an actual variable setting, you need to set it.
- All enabling/checking methods for a MockObject are done through the _mock attribute. Example:
- class Foo(object):
- def __init__(self):
- # NOTE: this initialization is not called by default with the mock
- # object.
- self.one = 'a'
- self.two = 'b'
- def method(self, param):
- # this method is enabled by calling _mock.enableMethod
- param.bar('print some data')
- self.printMe('some other data', self.one)
- return self.two
- def printMe(self, otherParam):
- # this method is not enabled and so is stubbed out in the MockInstance.
- print otherParam
- def test():
- m = MockInstance(Foo)
- m._mock.set(two=123)
- m._mock.enableMethod('method')
- param = MockObject()
- rv = m.method(param)
- assert(rv == 123) #m.two is returned
- # note that param.bar is created on the fly as it is accessed, and
- # stores how it was called.
- assert(param.bar._mock.assertCalled('print some data')
- # m.one and m.printMe were created on the fly as well
- # m.printMe remembers how it was called.
- m.printMe._mock.assertCalled('some other data', m.one)
- # attribute values are generated on the fly but are retained between
- # accesses.
- assert(m.foo is m.foo)
- TODO: set the return values for particular function calls w/ particular
- parameters.
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