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What is the one most common mistake you make while writing unit tests? Coupling? Lack of cohesion? Try to test too much functionality at once? Not testing enough functionality?
Post some example code if you have an example of that mistake
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Unit testing considerations What errors are commonly found during Unit Testing? (1) Misunderstood or incorrect arithmetic precedence, (2) Mixed mode operations, (3) Incorrect initialization, (4) Precision inaccuracy, (5) Incorrect symbolic representation of an expression.
Developers experience Unit Testing as difficult when they run into these kinds of problems: Classes are tightly coupled to other classes, which makes it hard to test because you need to control those other classes as well when you are writing your tests. This is very, very difficult and very error prone.
Not writing them at all.
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Testing too much in one test. My unit tests often take on more of the character of integration tests by not confining themselves to the method under test.
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