28 lines
1,003 B
Markdown
28 lines
1,003 B
Markdown
---
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title: >
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Increasing test coverage with regression tests
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pubDate: 2023-09-18
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permalink: >-
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archive/2023/09/18/increasing-test-coverage-with-regression-tests
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tags:
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- software-development
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- automated-testing
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- test-driven-development
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---
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Automated test suites don't tell you everything works - they tell you what you've tested isn't broken.
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Having tests doesn't mean your code is bug-free. There could be edge cases or scenarios you haven't tested for that contain bugs, even though your test suite is passing.
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## What do we do?
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When you find a bug, try replicating it within an automated test before attempting to fix it.
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Once you have a failing test and can replicate the issue, go ahead and fix it.
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If the test passes, you know you've fixed the bug and solved the issue.
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## Here's the thing
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Now you have this test, you cannot re-add the bug again without the test failing. You've prevented anyone from accidentally re-introducing it in the future and increased your test coverage.
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