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The main historical stages of software testing

1. Debugging-oriented era (1950s)

• This stage was born when there was no difference between testing and debugging;
• Attention to error correction during code analysis;
• There was no clear concept of “software tester” or “software testing”.

2. Demonstration-oriented era (1957-1978)

• The difference between debugging and testing has been developed;
• Testing is conducted as a separate activity;
• Testing aimed at verifying the fulfillment of software requirements.
• “The more you test, the more likely you are to find a bug.”

3. Destruction-oriented era (1979-1982)

• Cracking the code and searching for errors;
• Glenford J. Myers introduced the separation of debugging from testing (1979);
• The “destruction” approach failed; lack of defect prevention; the risk of never releasing the software due to constant bug-finding.

4. Evaluation-oriented era (1983-1987)

• Special attention to evaluation and measurement of software quality;
• Testing continued until an acceptable level of error detection was achieved, especially for large software.

5. Prevention-oriented era (1988-2000)

• A new approach, where the main emphasis is on demonstrating conformity to specifications, identifying faults and preventing defects;
• There are now 2 types of code: test and non-test (it was important that the tested code had fewer errors than the code that is difficult to test);
• Identification of test methods became crucial and exploratory testing emerged for a deep understanding of software to detect bugs.

The peak of evolution in the history of software testing was in 2004. It was then that automated testing tools appeared, such as Selenium.

And of course, nowadays there are different types of testing, for example, unit testing, integration testing, acceptance testing, etc. We would also like to draw your attention to the fact that the current era is moving towards testing with the help of artificial intelligence (AI) tools. But will AI ever replace the software tester or not? Interesting question, isn’t it?

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