Cyclomatic Complexity

Transcript

1. 1.

   foolab.ca | @foolabca Cyclomatic Complexity Bulgaria PHP, Sofia - October

   8, 2016
2. 2.

   Execution Paths public function getShipping() { if ($this->subtotal >= 40)

   { return 0; } return $this->standardShipping; } 2
3. 3.

   Execution Paths public function getShipping() { if ($this->subtotal >= 40)

   { return 0; } return $this->standardShipping; } 3 Path 1 Path 2
4. 4.

   Decision Branches 4 start product loop free shipping? end

5. 5.

   Decision Branches 5 start product loop free shipping? end

6. 6.

   Cyclomatic complexity = edges − nodes +
 2 * connected

   components
7. 7.

   Decision Branches 7 start product loop free shipping? end ◦

   Edges ◦ Nodes ◦ Connected components.
8. 8.

   Decision Branches 8 start product loop free shipping? end ◦

   Edges ◦ Nodes ◦ Connected components.
9. 9.

   Decision Branches 9 start product loop free shipping? end ◦

   Edges ◦ Nodes ◦ Connected components.
10. 10.

    Cyclomatic complexity = 9 − 8 + 2 * 1

    = 3
11. 11.

    Zero Times foreach ($products as $product) { $total = $product->price

    * $product->quantity; } $tax = $total * ... 11
12. 12.

    Multiple Times $total = 0; foreach ($products as $product) {

    $total = $product->price * $product->quantity; } $tax = $total * ... 12
13. 13.

    Multiple Times $total = 0; foreach ($products as $product) {

    $total += $product->price * $product->quantity; } $tax = $total * ... 13
14. 14.

    @afilina afilina.com