Python-Learning-UnitTest

• unittest — Unit testing framework

To achieve this, unittest supports some important concepts:

test fixture

A test fixture represents the preparation needed to perform one or moretests, and any associate cleanup actions. This may involve, for example,creating temporary or proxy databases, directories, or starting a serverprocess.

test case

A test case is the smallest unit of testing. It checks for a specificresponse to a particular set of inputs. unittest provides a base class, TestCase, which may be used to create new test cases.

test suite

A test suite is a collection of test cases, test suites, or both. It isused to aggregate tests that should be executed together.

test runner

A test runner is a component which orchestrates the execution of testsand provides the outcome to the user. The runner may use a graphical interface,a textual interface, or return a special value to indicate the results ofexecuting the tests.

• 详解Python的单元测试 (Quote)  
  单元测试可以有效地测试某个程序模块的行为，是未来重构代码的信心保证。

  单元测试的测试用例要覆盖常用的输入组合、边界条件和异常。

  单元测试代码要非常简单，如果测试代码太复杂，那么测试代码本身就可能有bug。

  单元测试通过了并不意味着程序就没有bug了，但是不通过程序肯定有bug。

  
  

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• Questions
  1.  When using 'assertRaise' , the function is not executed.
     

     class TestSolver(TestCase):
         def test_negative_discr(self):
             s = Solver
             self.assertRaises(Exception,s.demo,3,0,1) #s.demo not executed
         def test_demo(self):
             self.fail()

  2.