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    1. POHow to write test code before write source code when they are objects dependencies?
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    1. COTo make a strict unit test we must use mocking else it's not longer unit test but integration or functional test. using mocking imply to know internal behavior of ur class under the test as showing in my example. it's not possible to know internal behavior during specification time, then it's not possible to write usable unit-test before writing source code
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    2. COunit tests are not written during specification time. As you would know that The goal of unit testing is to isolate each part of the program and show that the individual parts are correct. A unit test provides a strict, written contract that the piece of code must satisfy.Unit testing allows the programmer to refactor code at a later date, and make sure the module still works correctly (e.g., in regression testing). The procedure is to write test cases for all functions and methods so that whenever a change causes a fault, it can be quickly identified and fixed.
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    3. COContinuing on my previous comment what i meant was that if the object behaviour is going to change extensively as your software process continues it is futile or extensive work to write unit test cases for those objects because the criteria with which they were written would not be satisfied. but unit tests are definitely not written during specification time. they are written when the specification has been absorbed into a functional requirement and the functional requirement has been used to identify the behaviour of the actors of your system using OO Methodologies.
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Guidance
A row detail

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