{"id":1361,"date":"2013-08-28T12:15:55","date_gmt":"2013-08-28T10:15:55","guid":{"rendered":"http:\/\/blog.gocept.com\/?p=1361"},"modified":"2013-08-28T14:21:47","modified_gmt":"2013-08-28T12:21:47","slug":"run-tests-using-layers-with-py-test","status":"publish","type":"post","link":"https:\/\/blog.gocept.com\/2013\/08\/28\/run-tests-using-layers-with-py-test\/","title":{"rendered":"Run tests using layers with py.test"},"content":{"rendered":"<p><strong>TL;DR<\/strong><\/p>\n<ul>\n<li>Use <a href=\"https:\/\/pypi.python.org\/pypi\/gocept.pytestlayer\" target=\"_blank\">gocept.pytestlayer<\/a>.<\/li>\n<\/ul>\n<p><strong>Long Story<\/strong><\/p>\n<p>We have many test suites which use test layers (e. g. the ones from <a href=\"https:\/\/pypi.python.org\/pypi\/plone.testing\" target=\"_blank\">plone.testing<\/a>). We want to use <a href=\"http:\/\/pytest.org\" target=\"_blank\">py.test<\/a>\u00a0and all its fancy features to have a modern test runner. There was no way to convert such tests partly: either you have to port the whole project or you are stuck with the <a href=\"https:\/\/pypi.python.org\/pypi\/zope.testrunner\" target=\"_blank\">zope.testrunner<\/a>.<\/p>\n<p>On our <a title=\"August, 15th\u201317th: Sprinting on\u00a0Pyramid\" href=\"http:\/\/blog.gocept.com\/2013\/05\/29\/august-15th-17th-sprinting-on-pyramid\/\" target=\"_blank\">Pyramid-Sprint<\/a>\u00a0Godefroid Chapelle, Thomas Lotze and me wrote a package which wraps layers as <a href=\"http:\/\/pytest.org\/latest\/fixture.html\" target=\"_blank\">py.test fixtures<\/a>. The result is\u00a0<a href=\"https:\/\/pypi.python.org\/pypi\/gocept.pytestlayer\" target=\"_blank\">gocept.pytestlayer<\/a>.<\/p>\n<p><em>Implementation<\/em><\/p>\n<p>For each layer it creates two fixtures: one for the layer setUp\/tearDown and one for the testSetUp\/testTearDown.\u00a0The layer fixture is configured for class scope\u00a0but the plug-in orders the tests and knows about the next test so the layer is only torn down if the next test needs another fixture.<\/p>\n<p><em>Usage<\/em><\/p>\n<p>You only have to add a new section to your package buildout and running the test via<\/p>\n<blockquote><p>bin\/py.test -x<\/p><\/blockquote>\n<p>detects the layers and displays the needed setup code. See the <a href=\"https:\/\/pypi.python.org\/pypi\/gocept.pytestlayer\" target=\"_blank\">PyPI-Page<\/a>\u00a0of the package for details.<\/p>\n<p><em>Future<\/em><\/p>\n<p>Maybe it is possible to get rid of the fixture setup code, so running tests using layers gets even easier.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>TL;DR Use gocept.pytestlayer. Long Story We have many test suites which use test layers (e. g. the ones from plone.testing). We want to use py.test\u00a0and all its fancy features to have a modern test runner. There was no way to convert such tests partly: either you have to port the whole project or you are &hellip; <a href=\"https:\/\/blog.gocept.com\/2013\/08\/28\/run-tests-using-layers-with-py-test\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Run tests using layers with py.test&#8221;<\/span><\/a><\/p>\n","protected":false},"author":15344399,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","advanced_seo_description":"","jetpack_seo_html_title":"","jetpack_seo_noindex":false,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_newsletter_tier_id":0,"footnotes":"","jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[10221],"tags":[796951,47312807,832,22272,4721411,12,72208,192426512],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_likes_enabled":true,"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/pFP3y-lX","jetpack-related-posts":[{"id":2351,"url":"https:\/\/blog.gocept.com\/2017\/05\/03\/zope-2-resurrection-sprint-day-1\/","url_meta":{"origin":1361,"position":0},"title":"Zope 2 Resurrection Sprint \u2013 Day 1","author":"Michael Howitz","date":"May 3, 2017","format":false,"excerpt":"Welcome to the\u00a0Zope 2 Resurrection Sprint in Halle (Saale), Germany. We hope you enjoyed the time since the\u00a0Last call for take off to the Python 3 wonderland. We already achieved some things: Zope 4 no longer depends on\u00a0sourcecodegen\u00a0which was one of Zope's dependencies Earl Zope II\u00a0had to leave behind for\u2026","rel":"","context":"In &quot;en&quot;","block_context":{"text":"en","link":"https:\/\/blog.gocept.com\/category\/en\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":39,"url":"https:\/\/blog.gocept.com\/2011\/01\/24\/testing-pyramid-applications-with-zope-testbrowser\/","url_meta":{"origin":1361,"position":1},"title":"Testing pyramid applications with zope.testbrowser","author":"","date":"January 24, 2011","format":false,"excerpt":"The Pyramid documentation recommends using WebTest for functional tests, but coming from the Zope world, zope.testbrowser is the more familiar tool for this job (and it seems a little more high-level than WebTest at first glance). With the 3.11 release,\u00a0 zope.testbrowser gained out-of-the-box support for talking to WSGI applications (courtesy\u2026","rel":"","context":"In &quot;en&quot;","block_context":{"text":"en","link":"https:\/\/blog.gocept.com\/category\/en\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":98,"url":"https:\/\/blog.gocept.com\/2011\/08\/04\/shutting-down-an-httpserver\/","url_meta":{"origin":1361,"position":2},"title":"Shutting down an HTTPServer","author":"","date":"August 4, 2011","format":false,"excerpt":"For integration tests it can be helpful to have a fake HTTP server whose behaviour the tests can control. All necessary building blocks are even included in Python standard library. However, the BaseHTTPServer is surprisingly hard to shut down properly, so that it gives up the socket and everything. While\u2026","rel":"","context":"In &quot;en&quot;","block_context":{"text":"en","link":"https:\/\/blog.gocept.com\/category\/en\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":381,"url":"https:\/\/blog.gocept.com\/2013\/01\/16\/news-from-the-toolbox-gocept-selenium-and-our-plans-for-its-future\/","url_meta":{"origin":1361,"position":3},"title":"News from the toolbox: gocept.selenium and our plans for its future","author":"","date":"January 16, 2013","format":false,"excerpt":"For a couple of years, we at gocept have been developing a Python library, gocept.selenium, whose goal it is to integrate testing web sites in real browsers with the Python unittest framework. There exist a number of approaches to doing this; when first starting real-browser tests, we opted for using\u2026","rel":"","context":"In &quot;en&quot;","block_context":{"text":"en","link":"https:\/\/blog.gocept.com\/category\/en\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":268,"url":"https:\/\/blog.gocept.com\/2012\/11\/09\/python-2-and-3-compatible-builds-with-zc-buildout\/","url_meta":{"origin":1361,"position":4},"title":"Python 2 and 3 compatible builds with zc.buildout","author":"","date":"November 9, 2012","format":false,"excerpt":"Creating a single-source build environment with zc.buildout that works for both Python 2 and 3 is a bit of a hassle. This blog post shows how to do it for a minimal demo project. 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