[test theory] test phase analysis (unit, integration, system test)

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Preface

Some test process details summarized from my work and study

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Related articles

【 Test theory 】 Test professional thinking
【 Test theory 】 Test process management

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One 、 Testing phase

From the previous test process management , Know the commonly used testing stages , Analyze in order

1. unit testing

1.1 brief introduction

Test the correctness of the smallest component unit of product realization , for example ： A function or a class method .

1.2 Test purpose

• The implementation content conforms to the detailed design document
• The earliest intervention test , Ensure fewer defects in subsequent stages , Reduce repair costs
• Testers are clear about code logic , Locate problems faster , Avoid problems
• Test-driven development

1.3 The test method

• White box test method

1.4 Test evaluation

• Logical coverage ：
  1、 The execution rate of unit test cases is 100%, The pass rate is 95%
  2、 The coverage of the subject sentence reaches 100%
  3、 The coverage of branch statements reaches 85%

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2. Integration testing

2.1 brief introduction

On a unit test basis , Integrate all modules into subsystems or systems according to the outline design documents , Verify whether the logic between modules is correct .

2.2 Test purpose

• The content of the implementation conforms to the outline design document
• Step in early to test , Ensure fewer defects in subsequent stages , Reduce repair costs
• Testers should be clear about the logic between modules , Locate problems faster , Avoid problems

2.3 The test method

• Grey box test method

2.4 Test evaluation

• Interface coverage ：
  1、 The execution rate of test cases is 100%, The pass rate is 95%
  2、 Interface equivalence class 、 The coverage of boundary value reaches 85%

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3. The system test

3.1 brief introduction

product （ The system integrated in the previous stage ） And hardware 、 Third party software 、 Data and personnel are combined , In the actual operating environment , Carry out a series of tests on the product .

3.2 Test purpose

• The content of the implementation conforms to the requirements analysis document
• The final phase of testing , Ensure the minimum defects online
• Close to the user environment

3.3 The test method

• Black box test method

3.4 Test evaluation

• Demand coverage ：P0 The use case coverage is 100%, Other coverage rates can be adjusted flexibly according to the product stage
• Code coverage
• Defect rate
• Missing rate