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authorSteve Piercy <web@stevepiercy.com>2015-10-22 09:32:42 -0700
committerSteve Piercy <web@stevepiercy.com>2015-10-22 09:32:42 -0700
commit4ade6de3bef51483a442fc404c350b3ce9c10988 (patch)
tree6c984ce9c6164d0615640da37d844444175b53b2 /docs
parentd4221720b8409eafb65b301562be327af0196c7e (diff)
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minor grammar, rewrap 79 columns, some .rst syntax fixes
Diffstat (limited to 'docs')
-rw-r--r--docs/narr/testing.rst195
1 files changed, 95 insertions, 100 deletions
diff --git a/docs/narr/testing.rst b/docs/narr/testing.rst
index ecda57489..c05ee41ad 100644
--- a/docs/narr/testing.rst
+++ b/docs/narr/testing.rst
@@ -13,34 +13,32 @@ application. In this context, a "unit" is often a function or a method of a
class instance. The unit is also referred to as a "unit under test".
The goal of a single unit test is to test **only** some permutation of the
-"unit under test". If you write a unit test that aims to verify the result
-of a particular codepath through a Python function, you need only be
-concerned about testing the code that *lives in the function body itself*.
-If the function accepts a parameter that represents a complex application
-"domain object" (such as a resource, a database connection, or an SMTP
-server), the argument provided to this function during a unit test *need not
-be* and likely *should not be* a "real" implementation object. For example,
-although a particular function implementation may accept an argument that
-represents an SMTP server object, and the function may call a method of this
-object when the system is operating normally that would result in an email
-being sent, a unit test of this codepath of the function does *not* need to
-test that an email is actually sent. It just needs to make sure that the
-function calls the method of the object provided as an argument that *would*
-send an email if the argument happened to be the "real" implementation of an
-SMTP server object.
+"unit under test". If you write a unit test that aims to verify the result of
+a particular codepath through a Python function, you need only be concerned
+about testing the code that *lives in the function body itself*. If the
+function accepts a parameter that represents a complex application "domain
+object" (such as a resource, a database connection, or an SMTP server), the
+argument provided to this function during a unit test *need not be* and likely
+*should not be* a "real" implementation object. For example, although a
+particular function implementation may accept an argument that represents an
+SMTP server object, and the function may call a method of this object when the
+system is operating normally that would result in an email being sent, a unit
+test of this codepath of the function does *not* need to test that an email is
+actually sent. It just needs to make sure that the function calls the method
+of the object provided as an argument that *would* send an email if the
+argument happened to be the "real" implementation of an SMTP server object.
An *integration test*, on the other hand, is a different form of testing in
which the interaction between two or more "units" is explicitly tested.
-Integration tests verify that the components of your application work
-together. You *might* make sure that an email was actually sent in an
-integration test.
+Integration tests verify that the components of your application work together.
+You *might* make sure that an email was actually sent in an integration test.
A *functional test* is a form of integration test in which the application is
-run "literally". You would *have to* make sure that an email was actually
-sent in a functional test, because it tests your code end to end.
+run "literally". You would *have to* make sure that an email was actually sent
+in a functional test, because it tests your code end to end.
-It is often considered best practice to write each type of tests for any
-given codebase. Unit testing often provides the opportunity to obtain better
+It is often considered best practice to write each type of tests for any given
+codebase. Unit testing often provides the opportunity to obtain better
"coverage": it's usually possible to supply a unit under test with arguments
and/or an environment which causes *all* of its potential codepaths to be
executed. This is usually not as easy to do with a set of integration or
@@ -55,9 +53,9 @@ integration tests. A good :mod:`unittest` tutorial is available within `Dive
Into Python <http://www.diveintopython.net/unit_testing/index.html>`_ by Mark
Pilgrim.
-:app:`Pyramid` provides a number of facilities that make unit, integration,
-and functional tests easier to write. The facilities become particularly
-useful when your code calls into :app:`Pyramid` -related framework functions.
+:app:`Pyramid` provides a number of facilities that make unit, integration, and
+functional tests easier to write. The facilities become particularly useful
+when your code calls into :app:`Pyramid`-related framework functions.
.. index::
single: test setup
@@ -67,42 +65,41 @@ useful when your code calls into :app:`Pyramid` -related framework functions.
.. _test_setup_and_teardown:
Test Set Up and Tear Down
---------------------------
+-------------------------
:app:`Pyramid` uses a "global" (actually :term:`thread local`) data structure
to hold two items: the current :term:`request` and the current
:term:`application registry`. These data structures are available via the
:func:`pyramid.threadlocal.get_current_request` and
-:func:`pyramid.threadlocal.get_current_registry` functions, respectively.
-See :ref:`threadlocals_chapter` for information about these functions and the
-data structures they return.
+:func:`pyramid.threadlocal.get_current_registry` functions, respectively. See
+:ref:`threadlocals_chapter` for information about these functions and the data
+structures they return.
If your code uses these ``get_current_*`` functions or calls :app:`Pyramid`
code which uses ``get_current_*`` functions, you will need to call
:func:`pyramid.testing.setUp` in your test setup and you will need to call
:func:`pyramid.testing.tearDown` in your test teardown.
-:func:`~pyramid.testing.setUp` pushes a registry onto the :term:`thread
-local` stack, which makes the ``get_current_*`` functions work. It returns a
+:func:`~pyramid.testing.setUp` pushes a registry onto the :term:`thread local`
+stack, which makes the ``get_current_*`` functions work. It returns a
:term:`Configurator` object which can be used to perform extra configuration
required by the code under test. :func:`~pyramid.testing.tearDown` pops the
thread local stack.
-Normally when a Configurator is used directly with the ``main`` block of
-a Pyramid application, it defers performing any "real work" until its
-``.commit`` method is called (often implicitly by the
-:meth:`pyramid.config.Configurator.make_wsgi_app` method). The
-Configurator returned by :func:`~pyramid.testing.setUp` is an
-*autocommitting* Configurator, however, which performs all actions
-implied by methods called on it immediately. This is more convenient
-for unit-testing purposes than needing to call
-:meth:`pyramid.config.Configurator.commit` in each test after adding
-extra configuration statements.
+Normally when a Configurator is used directly with the ``main`` block of a
+Pyramid application, it defers performing any "real work" until its ``.commit``
+method is called (often implicitly by the
+:meth:`pyramid.config.Configurator.make_wsgi_app` method). The Configurator
+returned by :func:`~pyramid.testing.setUp` is an *autocommitting* Configurator,
+however, which performs all actions implied by methods called on it
+immediately. This is more convenient for unit testing purposes than needing to
+call :meth:`pyramid.config.Configurator.commit` in each test after adding extra
+configuration statements.
The use of the :func:`~pyramid.testing.setUp` and
-:func:`~pyramid.testing.tearDown` functions allows you to supply each unit
-test method in a test case with an environment that has an isolated registry
-and an isolated request for the duration of a single test. Here's an example
-of using this feature:
+:func:`~pyramid.testing.tearDown` functions allows you to supply each unit test
+method in a test case with an environment that has an isolated registry and an
+isolated request for the duration of a single test. Here's an example of using
+this feature:
.. code-block:: python
:linenos:
@@ -117,22 +114,21 @@ of using this feature:
def tearDown(self):
testing.tearDown()
-The above will make sure that
-:func:`~pyramid.threadlocal.get_current_registry` called within a test
-case method of ``MyTest`` will return the :term:`application registry`
-associated with the ``config`` Configurator instance. Each test case
-method attached to ``MyTest`` will use an isolated registry.
+The above will make sure that :func:`~pyramid.threadlocal.get_current_registry`
+called within a test case method of ``MyTest`` will return the
+:term:`application registry` associated with the ``config`` Configurator
+instance. Each test case method attached to ``MyTest`` will use an isolated
+registry.
The :func:`~pyramid.testing.setUp` and :func:`~pyramid.testing.tearDown`
-functions accepts various arguments that influence the environment of the
-test. See the :ref:`testing_module` API for information about the extra
-arguments supported by these functions.
+functions accept various arguments that influence the environment of the test.
+See the :ref:`testing_module` API for information about the extra arguments
+supported by these functions.
If you also want to make :func:`~pyramid.threadlocal.get_current_request`
return something other than ``None`` during the course of a single test, you
-can pass a
-:term:`request` object into the :func:`pyramid.testing.setUp` within the
-``setUp`` method of your test:
+can pass a :term:`request` object into the :func:`pyramid.testing.setUp` within
+the ``setUp`` method of your test:
.. code-block:: python
:linenos:
@@ -148,24 +144,23 @@ can pass a
def tearDown(self):
testing.tearDown()
-If you pass a :term:`request` object into :func:`pyramid.testing.setUp`
-within your test case's ``setUp``, any test method attached to the
-``MyTest`` test case that directly or indirectly calls
+If you pass a :term:`request` object into :func:`pyramid.testing.setUp` within
+your test case's ``setUp``, any test method attached to the ``MyTest`` test
+case that directly or indirectly calls
:func:`~pyramid.threadlocal.get_current_request` will receive the request
object. Otherwise, during testing,
-:func:`~pyramid.threadlocal.get_current_request` will return ``None``.
-We use a "dummy" request implementation supplied by
-:class:`pyramid.testing.DummyRequest` because it's easier to construct
-than a "real" :app:`Pyramid` request object.
+:func:`~pyramid.threadlocal.get_current_request` will return ``None``. We use a
+"dummy" request implementation supplied by
+:class:`pyramid.testing.DummyRequest` because it's easier to construct than a
+"real" :app:`Pyramid` request object.
Test setup using a context manager
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-An alternative style of setting up a test configuration is to use the
-`with` statement and :func:`pyramid.testing.testConfig` to create a
-context manager. The context manager will call
-:func:`pyramid.testing.setUp` before the code under test and
-:func:`pyramid.testing.tearDown` afterwards.
+An alternative style of setting up a test configuration is to use the ``with``
+statement and :func:`pyramid.testing.testConfig` to create a context manager.
+The context manager will call :func:`pyramid.testing.setUp` before the code
+under test and :func:`pyramid.testing.tearDown` afterwards.
This style is useful for small self-contained tests. For example:
@@ -193,8 +188,8 @@ they're used by frameworks. Sorry. So here's a rule of thumb: if you don't
about any of this, but you still want to write test code, just always call
:func:`pyramid.testing.setUp` in your test's ``setUp`` method and
:func:`pyramid.testing.tearDown` in your tests' ``tearDown`` method. This
-won't really hurt anything if the application you're testing does not call
-any ``get_current*`` function.
+won't really hurt anything if the application you're testing does not call any
+``get_current*`` function.
.. index::
single: pyramid.testing
@@ -225,15 +220,15 @@ function.
.. note::
This code implies that you have defined a renderer imperatively in a
- relevant :class:`pyramid.config.Configurator` instance,
- otherwise it would fail when run normally.
+ relevant :class:`pyramid.config.Configurator` instance, otherwise it would
+ fail when run normally.
Without doing anything special during a unit test, the call to
:meth:`~pyramid.request.Request.has_permission` in this view function will
always return a ``True`` value. When a :app:`Pyramid` application starts
-normally, it will populate a :term:`application registry` using
+normally, it will populate an :term:`application registry` using
:term:`configuration declaration` calls made against a :term:`Configurator`.
-But if this application registry is not created and populated (e.g. by
+But if this application registry is not created and populated (e.g., by
initializing the configurator with an authorization policy), like when you
invoke application code via a unit test, :app:`Pyramid` API functions will tend
to either fail or return default results. So how do you test the branch of the
@@ -283,10 +278,10 @@ In the above example, we create a ``MyTest`` test case that inherits from
be found when ``setup.py test`` is run. It has two test methods.
The first test method, ``test_view_fn_forbidden`` tests the ``view_fn`` when
-the authentication policy forbids the current user the ``edit`` permission.
-Its third line registers a "dummy" "non-permissive" authorization policy
-using the :meth:`~pyramid.config.Configurator.testing_securitypolicy` method,
-which is a special helper method for unit testing.
+the authentication policy forbids the current user the ``edit`` permission. Its
+third line registers a "dummy" "non-permissive" authorization policy using the
+:meth:`~pyramid.config.Configurator.testing_securitypolicy` method, which is a
+special helper method for unit testing.
We then create a :class:`pyramid.testing.DummyRequest` object which simulates a
WebOb request object API. A :class:`pyramid.testing.DummyRequest` is a request
@@ -300,25 +295,25 @@ access. We check that the view function raises a
The second test method, named ``test_view_fn_allowed``, tests the alternate
case, where the authentication policy allows access. Notice that we pass
-different values to
-:meth:`~pyramid.config.Configurator.testing_securitypolicy` to obtain this
-result. We assert at the end of this that the view function returns a value.
+different values to :meth:`~pyramid.config.Configurator.testing_securitypolicy`
+to obtain this result. We assert at the end of this that the view function
+returns a value.
Note that the test calls the :func:`pyramid.testing.setUp` function in its
``setUp`` method and the :func:`pyramid.testing.tearDown` function in its
-``tearDown`` method. We assign the result of :func:`pyramid.testing.setUp`
-as ``config`` on the unittest class. This is a :term:`Configurator` object
-and all methods of the configurator can be called as necessary within
-tests. If you use any of the :class:`~pyramid.config.Configurator` APIs during
-testing, be sure to use this pattern in your test case's ``setUp`` and
-``tearDown``; these methods make sure you're using a "fresh"
-:term:`application registry` per test run.
-
-See the :ref:`testing_module` chapter for the entire :app:`Pyramid` -specific
+``tearDown`` method. We assign the result of :func:`pyramid.testing.setUp` as
+``config`` on the unittest class. This is a :term:`Configurator` object and
+all methods of the configurator can be called as necessary within tests. If you
+use any of the :class:`~pyramid.config.Configurator` APIs during testing, be
+sure to use this pattern in your test case's ``setUp`` and ``tearDown``; these
+methods make sure you're using a "fresh" :term:`application registry` per test
+run.
+
+See the :ref:`testing_module` chapter for the entire :app:`Pyramid`-specific
testing API. This chapter describes APIs for registering a security policy,
-registering resources at paths, registering event listeners, registering
-views and view permissions, and classes representing "dummy" implementations
-of a request and a resource.
+registering resources at paths, registering event listeners, registering views
+and view permissions, and classes representing "dummy" implementations of a
+request and a resource.
.. seealso::
@@ -392,7 +387,7 @@ In Pyramid, functional tests are typically written using the :term:`WebTest`
package, which provides APIs for invoking HTTP(S) requests to your application.
Regardless of which testing :term:`package` you use, ensure to add a
-``tests_require`` dependency on that package to to your application's
+``tests_require`` dependency on that package to your application's
``setup.py`` file:
.. literalinclude:: MyProject/setup.py
@@ -400,7 +395,7 @@ Regardless of which testing :term:`package` you use, ensure to add a
:emphasize-lines: 26-28,48
:language: python
-Assuming your :term:`package` is named ``myproject``, which contains a
+Let us assume your :term:`package` is named ``myproject`` which contains a
``views`` module, which in turn contains a :term:`view` function ``my_view``
that returns a HTML body when the root URL is invoked:
@@ -408,8 +403,8 @@ that returns a HTML body when the root URL is invoked:
:linenos:
:language: python
-Then the following example functional test (shown below) demonstrates invoking
-the :term:`view` shown above:
+Then the following example functional test demonstrates invoking the above
+:term:`view`:
.. literalinclude:: MyProject/myproject/tests.py
:linenos:
@@ -419,9 +414,9 @@ the :term:`view` shown above:
When this test is run, each test method creates a "real" :term:`WSGI`
application using the ``main`` function in your ``myproject.__init__`` module,
using :term:`WebTest` to wrap that WSGI application. It assigns the result to
-``self.testapp``. In the test named ``test_root``. The ``TestApp``'s ``get``
+``self.testapp``. In the test named ``test_root``. The ``TestApp``'s ``GET``
method is used to invoke the root URL. Finally, an assertion is made that the
returned HTML contains the text ``MyProject``.
-See the :term:`WebTest` documentation for further information about the
-methods available to a :class:`webtest.app.TestApp` instance.
+See the :term:`WebTest` documentation for further information about the methods
+available to a :class:`webtest.app.TestApp` instance.