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Infec&on: PHP Muta&on Tes&ng Framework by Michelangelo van Dam (@DragonBe)
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MICHELANGELO VAN DAM
I'm a senior #php architect, co-founder
and #ceo of @in2itvof, #community leader
at @phpbenelux, coach
at @CoderDojoBelgium, #MVP, #digitalnomad,
likes #coffee.
Infec&on: PHP Muta&on Tes&ng Framework by Michelangelo van Dam (@DragonBe)
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Infec&on: PHP Muta&on Tes&ng Framework by Michelangelo van Dam (@DragonBe)
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Infec&on: PHP Muta&on Tes&ng Framework by Michelangelo van Dam (@DragonBe)
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Small, impactful changes
• Function Signature (public,
protected visibility)
• Unwrapping functions and arrays
• Binary Arithmetic
• Rounding
• Boolean substitution
• Conditional boundaries
• Equal or identical checks
• Negated conditionals
• Increments
• Return values
• Removal mutators
• Loops
• Sorting
• Literal numbers
• Exceptions
• Type casting
• Regex
• Extensions
Infec&on: PHP Muta&on Tes&ng Framework by Michelangelo van Dam (@DragonBe)
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An example of a mutation
id = (string) $data['id'];
}
$this->rsvp = 0;
if (array_key_exists('yes_rsvp_count', $data)) {
$this->rsvp = $data['yes_rsvp_count'];
}
Infec&on: PHP Muta&on Tes&ng Framework by Michelangelo van Dam (@DragonBe)
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An example of a mutation
id = (string) $data['id'];
}
$this->rsvp = 1;
if (array_key_exists('yes_rsvp_count', $data)) {
$this->rsvp = $data['yes_rsvp_count'];
}
Infec&on: PHP Muta&on Tes&ng Framework by Michelangelo van Dam (@DragonBe)
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An example of a mutation
id = (string) $data['id'];
}
$this->rsvp = 1;
if (array_key_exists('yes_rsvp_count', $data)) {
$this->rsvp = $data['yes_rsvp_count'];
}
Infec&on: PHP Muta&on Tes&ng Framework by Michelangelo van Dam (@DragonBe)
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Infec&on: PHP Muta&on Tes&ng Framework by Michelangelo van Dam (@DragonBe)
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Infec&on: PHP Muta&on Tes&ng Framework by Michelangelo van Dam (@DragonBe)
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Infec&on: PHP Muta&on Tes&ng Framework by Michelangelo van Dam (@DragonBe)
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Live Demo
Infec&on: PHP Muta&on Tes&ng Framework by Michelangelo van Dam (@DragonBe)
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Conclusion
• Write tests!
• Cover mutations
• Repeat
Infec&on: PHP Muta&on Tes&ng Framework by Michelangelo van Dam (@DragonBe)
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Get started today!
composer require --dev infection/infection
./vendor/bin/infection
Infec&on: PHP Muta&on Tes&ng Framework by Michelangelo van Dam (@DragonBe)
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Improving quality one test at a &me
www.in2it.be
Infec&on: PHP Muta&on Tes&ng Framework by Michelangelo van Dam (@DragonBe)