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Django and the testing pyramid @aaronbassett

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Energy Pyramid

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Food Pyramid

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functional integration unit The testing pyramid

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Unit Tests test *1* thing in isolation

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SUPER FAST

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Integration Tests test things work together

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Functional Tests end-to-end testing

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Manual Testing people cycles not processor cycles

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Feature: Number verification Users can add verified mobile numbers to their profile Scenario: Adding a valid phone number Given I'm an authenticated user And I have a valid phone number When I go to the phone number page And I press the verify button Then I should not see the error message

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Feature: Number verification Users can add verified mobile numbers to their profile Scenario: Adding a valid phone number Given I'm an authenticated user And I have a valid phone number When I go to the phone number page And I press the verify button Then I should not see the error message

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Feature: Number verification Users can add verified mobile numbers to their profile Scenario: User enters an invalid phone number Given I'm an authenticated user When I go to the phone number page And I enter ‘not a number’ And I press the verify button Then I should see the error message

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Feature: Number verification Users can add verified mobile numbers to their profile Scenario: User enters an invalid phone number Given I'm an authenticated user When I go to the phone number page And I enter And I press the verify button Then I should see the error message Examples: | invalid_number | | foo@example.com | | 0 | | +441411111111 | | +44712345678 |

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Feature: Number verification Users can add verified mobile numbers to their profile Scenario: User enters an invalid phone number Given I'm an authenticated user When I go to the phone number page And I enter And I press the verify button Then I should see the error message Examples: | invalid_number | | foo@example.com | | 0 | | +441411111111 | | +44712345678 |

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functional integration unit

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@given("I'm an authenticated user") def authenticat_user(browser): browser.visit(urljoin(browser.url, '/login/') browser.fill('username', 'test_user') browser.fill('password', 'test_password') button = browser.find_by_css('button[name=submit]').first.click()

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@given("I'm an authenticated user") def authenticat_user(browser): browser.visit(urljoin(browser.url, '/login/') browser.fill('username', 'test_user') browser.fill('password', 'test_password') button = browser.find_by_css('button[name=submit]').first.click()

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@given("I'm an authenticated user") def authenticat_user(browser): browser.visit(urljoin(browser.url, '/login/') browser.fill('username', 'test_user') browser.fill('password', 'test_password') button = browser.find_by_css('button[name=submit]').first.click()

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@given("I'm an authenticated user") def authenticat_user(browser): browser.visit(urljoin(browser.url, '/login/') browser.fill('username', 'test_user') browser.fill('password', 'test_password') button = browser.find_by_css('button[name=submit]').first.click()

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splinter & pytest-splinter

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@when('I go to the phone number page') def go_to_number_submission_page(browser): browser.visit(urljoin(browser.url, '/number/') @when('I enter ') def enter_invalid_number(browser, invalid_number): browser.fill('number', invalid_number) @when('I press the verify button') def submit_number(browser): browser.find_by_css('button[name=verify]').first.click()

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@when('I go to the phone number page') def go_to_number_submission_page(browser): browser.visit(urljoin(browser.url, '/number/') @when('I enter ') def enter_invalid_number(browser, invalid_number): browser.fill('number', invalid_number) @when('I press the verify button') def submit_number(browser): browser.find_by_css('button[name=verify]').first.click()

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@when('I go to the phone number page') def go_to_number_submission_page(browser): browser.visit(urljoin(browser.url, '/number/') @when('I enter ') def enter_invalid_number(browser, invalid_number): browser.fill('number', invalid_number) @when('I press the verify button') def submit_number(browser): browser.find_by_css('button[name=verify]').first.click()

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@then('I should see the error message') def has_error_message(browser): browser.find_by_css('.message.error').first

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@then('I should see the error message') def has_error_message(browser): browser.find_by_css('.message.error').first

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@then('I should see the error message') def has_error_message(browser): browser.find_by_css('.message.error').first

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@given("I'm an authenticated user") def authenticat_user(browser): browser.visit(urljoin(browser.url, '/login/') browser.fill('username', 'test_user') browser.fill('password', 'test_password') button = browser.find_by_css('button[name=submit]').first.click()

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@given('I\'m logged in') @given("I'm an authenticated user") @given('I log in') def authenticat_user(browser): browser.visit(urljoin(browser.url, '/login/') browser.fill('username', 'test_user') browser.fill('password', 'test_password') button = browser.find_by_css('button[name=submit]').first.click()

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@given('I\'m logged in') @given("I'm an authenticated user") @given('I log in') def authenticat_user(browser): browser.visit(urljoin(browser.url, '/login/') browser.fill('username', 'test_user') browser.fill('password', 'test_password') button = browser.find_by_css('button[name=submit]').first.click()

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functional integration unit

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def start_number_verification(request): if request.method == "POST": if request.user.is_authenticated: number = request.POST.get("number", None) if re.search("[^0-9+-\\s]+", number): raise Exception existing_validation_requests = ValidationRequest.objects.filter( number=number, active=True ) if existing_validation_requests.exists(): raise Exception # AND SO ON...

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ryannevius.com

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functional integration unit

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def start_number_verification(request): if request.method == "POST": if request.user.is_authenticated: number = request.POST.get("number", None) if re.search("[^0-9+-\\s]+", number): raise Exception existing_validation_requests = ValidationRequest.objects.filter( number=number, active=True ) if existing_validation_requests.exists(): raise Exception # AND SO ON...

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def start_number_verification(request): if request.method == "POST": if request.user.is_authenticated: number = request.POST.get("number", None) if re.search("[^0-9+-\\s]+", number): raise Exception existing_validation_requests = ValidationRequest.objects.filter( number=number, active=True ) if existing_validation_requests.exists(): raise Exception # AND SO ON...

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mock.patch

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Connected

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Modular

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⌥⌘M

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class NumberVerificationView(View): def start_number_verification(request): if request.user.is_authenticated: number = request.POST.get("number", None) if re.search("[^0-9+-\\s]+", number): raise Exception existing_validation_requests = ValidationRequest.objects.filter( number=number, active=True ) if existing_validation_requests.exists(): raise Exception # AND SO ON...

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class NumberVerificationView(LoginRequiredMixin, View): login_url = '/login/' redirect_field_name = 'redirect_to' def start_number_verification(request): number = request.POST.get("number", None) if re.search("[^0-9+-\\s]+", number): raise Exception existing_validation_requests = ValidationRequest.objects.filter( number=number, active=True ) if existing_validation_requests.exists(): raise Exception # AND SO ON...

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class NumberVerificationView(LoginRequiredMixin, FormView): ... def form_valid(self, form): number = request.POST.get("number", None) if re.search("[^0-9+-\\s]+", number): raise Exception existing_validation_requests = ValidationRequest.objects.filter( number=number, active=True ) if existing_validation_requests.exists(): raise Exception # AND SO ON...

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class NumberVerificationView(LoginRequiredMixin, FormView): ... def form_valid(self, form): # AND SO ON... return super(ContactView, self).form_valid(form)

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def validate_phone_number_characters(value): if re.search("[^0-9+-\\s]+", value): raise ValidationError( _('%(value) contains invalid characters'), params={'value': value}, )

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def validate_no_active_verification_requests(value): existing_validation_requests = ValidationRequest.objects.filter( number=value, active=True ) if existing_validation_requests.exists(): raise ValidationError( _('There is already a pending request for %(value)'), params={'value': value}, )

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SUPER FAST

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property based testing http://hypothesis.works/

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@given(invalid_phone_number) @settings(max_examples=1000) def test_names_match_our_requirements(number): with pytest.raises(ValidationError, message="Expecting ValidationError"): validate_phone_number_characters(number)

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@given(invalid_phone_number) @settings(max_examples=1000) def test_names_match_our_requirements(number): with pytest.raises(ValidationError, message="Expecting ValidationError"): validate_phone_number_characters(number)

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httmock

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functional integration unit

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@pytest.mark.slowtest def test_function(): pass

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@pytest.mark.slowtest def test_function(): pass

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STOP!

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functional integration unit

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functional integration unit

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functional integration unit

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Grazie

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Django and the testing pyramid @aaronbassett