test pyramid
📱 CT-MAT
⚙️ CT-TAS
📗 CTFL
Official ISTQB Definition
A graphical model representing the relationship of the amount of testing per level, with more at the bottom than at the top.
3 Ways to Think About It
The Quick Take
A model showing you should have many unit tests, fewer integration tests, and even fewer UI tests.
Look Closer
The idea that fast, cheap tests at the bottom support slower, expensive tests at the top.
The Bottom Line
A triangle diagram: lots of small tests at the base, few big tests at the peak.
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