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TDD Performance Kata
1.
Live TDD Demo Arithmetic
Expression Evaluator Ionut G. Stan & Andrei Savu
2.
3.
Mindset change Think about
the smallest feature that you want to implement and express it in test code. Implement it. This leads to emergent design.
4.
Problem 1 + 2
* 5 - 4 = ? Tools Python, unittest, TextMate Data Flow Expression > Split in tokens > Postfix notation > Evaluate 1+2*5-4 > (1, +, 2, *, 5, -, 4) > (1, 2, 5, *, +, 4, -) > 7
5.
Postfix Notation !?
1 + 2 > 1 2 + 1 + 2 - 3 > 1 2 + 3 - 1 + 2 * 3 > 1 2 3 * + 1 + 2 * 3 - 4 > 1 2 3 * + 4 -
6.
Conclusions
TDD is no silver bullet
7.
Questions? thanks
:)
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