Automated Testing: Benefits and Costs

A discussion on the values of automated testing brings and the cost of doing it.

Transcript

1. Automate Testing: Benefits and Costs malcolm-kee
2. The Daily Life of a Programmer 1. Write Some Code for New Features or Bug Fix 2. Open Browser, Click Few Buttons 3. Verify It Works. If No, Go Back Step 1. 4. Handover to Next Step (Tester/ Operations to Deploy)
3. The Daily Life of a Programmer Automating Test 1. Write Some Code for New Features or Bug Fix 2. Open Browser, Click Few Buttons 3. Verify It Works. If No, Go Back Step 1. 4. Write Tests to Repeat Step 2 and 3. 5. Handover to Next Step (Tester/ Operations to Deploy)
4. Benefits - You need it to grow your testing as your code grows - You need it to have maintainable code when your code changes
5. Things to test = new changes + regression testing Things to test = new changes + regression testing Things to test = new changes + regression testin
6. Why Most Software Stinks as It Grows When you get to rewrite a legacy app but you just build another legacy app
7. - Initial Design Decision that No Longer Adequate as Business Rules/Directions Changes Recipes of Legacy Code
8. - Initial Design Decision that No Longer Adequate as Business Rules/Directions Changes - No Housekeeping. Dependencies are not keep up-to-date, missing out bug fixes and improvements. Recipes of Legacy Code
9. - Initial Design Decision that No Longer Adequate as Business Rules/Directions Changes - No Housekeeping. Dependencies are not keep up-to-date, missing out bug fixes and improvements. - Bad Code that seems working. Everyone writes bad code once in a while, but you don’t dare to change it “since it’s working”. Recipes of Legacy Code
10. Code Refactoring to improve outdated design and remove bad code. Keep dependencies up-to-date.
11. Code Refactoring to improve outdated design and remove bad code. Keep dependencies up-to-date. Automated Tests is Prerequisite to do them safely.
12. Costs - Automated Tests are code as well, you need skill and time to maintain it.
13. Costs - Automated Tests are code as well, you need skill and time to maintain it. - Badly written tests may slow you down, worse than no tests.
14. Benefits - Grows your testing as your code grows - Prerequisite to stop building legacy code Costs - Tests take skill/times to maintain - It is worse if done wrongly.