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Behaviour Driven Development with PHPSpec Zvonimir Spajic
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Behaviour Driven Development
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Behaviour Driven Development technique derived from test-first development
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Behaviour Driven Development focus on behaviour not implementation technique derived from test-first development
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It's using examples to talk through how an application behaves... And having conversations about those examples. Dan North
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a tool which can help you write clean and working PHP code using Behaviour Driven Development
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a tool which can help you write clean and working PHP code using Behaviour Driven Development at the spec level
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{ "require-dev": { "phpspec/phpspec": "^4.0" }, "config": { "bin-dir": "bin" }, "autoload": {"psr-0": {"": "src"}} }
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requirement:
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Dog requirement:
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shouldHaveType(Dog::class); } }
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behaviour:
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Dog can make a sound behaviour:
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makeSound()->shouldBe('Vuf Vuf'); } }
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Matchers describe how an object should behave
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// Identity matchers $this->getRating()->shouldBe(5); $this->getTitle()->shouldBeEqualTo("Star Wars"); $this->getReleaseDate()->shouldReturn(233366400); $this->getDescription()->shouldEqual("Inexplicably popular children's film"); // Comparison Matcher $this->getRating()->shouldBeLike('5'); // Type Matcher $this->shouldHaveType('Movie'); $this->shouldReturnAnInstanceOf('Movie'); $this->shouldBeAnInstanceOf('Movie'); $this->shouldImplement('Movie'); // Count Matcher $this->getDirectors()->shouldHaveCount(1); // IterableContain Matcher¶ $this->getCast()->shouldContain('Jane Smith'); // Throw Matcher $this->shouldThrow('\InvalidArgumentException')->duringSetRating(-3); $this->shouldThrow('\InvalidArgumentException')->during('setRating', array(-3)); $this->shouldThrow('\InvalidArgumentException')->duringInstantiation(); // ...
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behaviour:
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Dog can greet a Person behaviour:
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Stubs describe how we interact with object we query
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name()->willReturn('Mike'); $this->greet($person)->shouldBe('Hello Mike, Vuf Vuf'); } }
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name()->willReturn('Mike'); $this->greet($person)->shouldBe('Hello Mike, Vuf Vuf'); } }
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name() . 'Vuf Vuf'; } }
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spec:
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Person has a name spec:
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beConstructedWith('Mike'); $this->name()->shouldBe('Mike'); } }
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name = $name; } public function name() { return $this->name; } }
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spec:
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Person can change it's name spec:
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beConstructedWith('Mike'); $this->renameTo ('Mary'); $this->name()->shouldBe('Mary'); } }
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name = $name; } public function name() { return $this->name; } public function renameTo($argument1) { // TODO: write logic here } }
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name = $name; } public function name() { return $this->name; } public function renameTo(string $name) { $this->name = $name; } }
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beConstructedWith('Mike'); $this->name()->shouldBe('Mike'); } function it_returns_new_name_if_renamed() { $this->beConstructedWith('Mike'); $this->renameTo ('Mary'); $this->name()->shouldBe('Mary'); } }
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beConstructedWith('Mike'); } function it_returns_the_name_it_was_constructed_with() { $this->name()->shouldBe('Mike'); } function it_returns_new_name_if_renamed() { $this->renameTo ('Mary'); $this->name()->shouldBe('Mary'); } }
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behaviour:
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When a Dog greets a Person, it should be logged behaviour:
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Mocks and Spies describe how we interact with object we command
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beConstructedWith($logger); } // ... function it_logs_the_greeting(Named $named, Logger $logger) { $named->name()->willReturn('Mike'); $logger->log('Hello Mike, Vuf Vuf')->shouldBeCalled(); $this->greet($named); } }
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name() . ', Vuf Vuf'; return $greeting; } }
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logger = $logger; } public function makeSound() { return 'Vuf Vuf'; } public function greet(Named $named) { $greeting = 'Hello ' . $named->name() . ', Vuf Vuf'; $this->logger->log($greeting); return $greeting; } }
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Resources Driving quality with PhpSpec by Ciaran McNulty phpspec: Testing... *Designing* with a Bite Introducing BDD
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Thank You!