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bh=FvzDvrq1UMMHgygqzWp1Kvh+XEJnHp4rIrPCRPhyIpw=; b=iUrPvFgZtNuL6d8tv8kqJXrPnHI9B86esEO8bWHcnXeAUZAY4txF8fkQSFAi5ehqBwYRTf Q9IQddT46mIbAmU17uJ7JhKgnLO8HBV1F3obBSndxQ7SwNbc3Ey8Tox4FWou8tegTq6o/h eQYkhxF1mYpjfNZL+UAReng5mHKDB8Q= X-MC-Unique: exQgzM0BNAGSUN5AetVCTA-1 From: Thomas Huth To: qemu-devel@nongnu.org, Peter Maydell Subject: [PULL 8/9] docs/devel: Explain how acceptance tests can be skipped Date: Wed, 27 Jan 2021 10:54:43 +0100 Message-Id: <20210127095444.114495-9-thuth@redhat.com> In-Reply-To: <20210127095444.114495-1-thuth@redhat.com> References: <20210127095444.114495-1-thuth@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=thuth@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=63.128.21.124; envelope-from=thuth@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -30 X-Spam_score: -3.1 X-Spam_bar: --- X-Spam_report: (-3.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.255, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?UTF-8?q?Alex=20Benn=C3=A9e?= , Wainer dos Santos Moschetta Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @redhat.com) Content-Type: text/plain; charset="utf-8" From: Wainer dos Santos Moschetta Documented under the "Acceptance tests using the Avocado Framework" section in testing.rst how environment variables are used to skip tests. Signed-off-by: Wainer dos Santos Moschetta Message-Id: <20210115210022.417996-1-wainersm@redhat.com> Reviewed-by: Thomas Huth Signed-off-by: Thomas Huth --- docs/devel/testing.rst | 62 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 62 insertions(+) diff --git a/docs/devel/testing.rst b/docs/devel/testing.rst index 0aa7a13bba..9f8b77c8ec 100644 --- a/docs/devel/testing.rst +++ b/docs/devel/testing.rst @@ -871,6 +871,68 @@ qemu_bin =20 The exact QEMU binary to be used on QEMUMachine. =20 +Skipping tests +-------------- +The Avocado framework provides Python decorators which allow for easily sk= ip +tests running under certain conditions. For example, on the lack of a bina= ry +on the test system or when the running environment is a CI system. For fur= ther +information about those decorators, please refer to:: + + https://avocado-framework.readthedocs.io/en/latest/guides/writer/chapter= s/writing.html#skipping-tests + +While the conditions for skipping tests are often specifics of each one, t= here +are recurring scenarios identified by the QEMU developers and the use of +environment variables became a kind of standard way to enable/disable test= s. + +Here is a list of the most used variables: + +AVOCADO_ALLOW_LARGE_STORAGE +~~~~~~~~~~~~~~~~~~~~~~~~~~~ +Tests which are going to fetch or produce assets considered *large* are not +going to run unless that `AVOCADO_ALLOW_LARGE_STORAGE=3D1` is exported on +the environment. + +The definition of *large* is a bit arbitrary here, but it usually means an +asset which occupies at least 1GB of size on disk when uncompressed. + +AVOCADO_ALLOW_UNTRUSTED_CODE +~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +There are tests which will boot a kernel image or firmware that can be +considered not safe to run on the developer's workstation, thus they are +skipped by default. The definition of *not safe* is also arbitrary but +usually it means a blob which either its source or build process aren't +public available. + +You should export `AVOCADO_ALLOW_UNTRUSTED_CODE=3D1` on the environment in +order to allow tests which make use of those kind of assets. + +AVOCADO_TIMEOUT_EXPECTED +~~~~~~~~~~~~~~~~~~~~~~~~ +The Avocado framework has a timeout mechanism which interrupts tests to av= oid the +test suite of getting stuck. The timeout value can be set via test paramet= er or +property defined in the test class, for further details:: + + https://avocado-framework.readthedocs.io/en/latest/guides/writer/chapter= s/writing.html#setting-a-test-timeout + +Even though the timeout can be set by the test developer, there are some t= ests +that may not have a well-defined limit of time to finish under certain +conditions. For example, tests that take longer to execute when QEMU is +compiled with debug flags. Therefore, the `AVOCADO_TIMEOUT_EXPECTED` varia= ble +has been used to determine whether those tests should run or not. + +GITLAB_CI +~~~~~~~~~ +A number of tests are flagged to not run on the GitLab CI. Usually because +they proved to the flaky or there are constraints on the CI environment wh= ich +would make them fail. If you encounter a similar situation then use that +variable as shown on the code snippet below to skip the test: + +.. code:: + + @skipIf(os.getenv('GITLAB_CI'), 'Running on GitLab') + def test(self): + do_something() + Uninstalling Avocado -------------------- =20 --=20 2.27.0