add [test] "extra" to install testing-only dependencies

closes ticket:2776

.travis.yml

@@ -13,9 +13,9 @@ before_install:
   - git fetch --depth=1000
   - python misc/build_helpers/show-tool-versions.py
 install:
-  - pip install coverage coveralls
+  - pip install coveralls
 before_script:
-  - pip install -e .
+  - pip install -e .[test]
 script:
   - coverage run --branch --source=src/allmydata `which tahoe` --version-and-path debug trial --rterrors --reporter=timing
 after_success:

docs/INSTALL.rst

@@ -203,15 +203,16 @@ Hacking On Tahoe-LAFS
 ---------------------
 
 To modify the Tahoe source code, you should get a git checkout, and install
-with the ``--editable`` flag::
+with the ``--editable`` flag. You should also use the ``[test]`` extra to get
+the additional libraries needed to run the unit tests::
 
  % git clone https://github.com/tahoe-lafs/tahoe-lafs.git
  
  % cd tahoe-lafs
  
  % virtualenv venv
  
- % venv/bin/pip install --editable .
+ % venv/bin/pip install --editable .[test]
  Obtaining file::~/tahoe-lafs
  ...
  Successfully installed ...
@@ -257,11 +258,11 @@ into your tahoe-specific virtualenv with ``pip install tox``.
 
 Then just run ``tox``. This will create a new fresh virtualenv, install Tahoe
 (from the source tree, including any changes you have made) and all its
-dependencies into the virtualenv, then run the unit tests. This ensures that
-the tests are repeatable and match the results of other users, unaffected by
-any other Python packages installed on your machine. On a modern computer
-this will take 5-10 minutes, and should result in a "all tests passed"
-mesage::
+dependencies (including testing-only dependencies) into the virtualenv, then
+run the unit tests. This ensures that the tests are repeatable and match the
+results of other users, unaffected by any other Python packages installed on
+your machine. On a modern computer this will take 5-10 minutes, and should
+result in a "all tests passed" mesage::
 
  % tox
  GLOB sdist-make: ~/tahoe-lafs/setup.py

setup.py

@@ -267,6 +267,8 @@ def try_from_git(self):
       classifiers=trove_classifiers,
       test_suite="allmydata.test",
       install_requires=install_requires,
+      extras_require={"test": ["pyflakes", "coverage"],
+                      },
       package_data={"allmydata.web": ["*.xhtml",
                                       "static/*.js", "static/*.png", "static/*.css",
                                       "static/img/*.png",

topfiles/2776.change

@@ -0,0 +1,5 @@
+Tahoe's testing-only dependencies can now be installed by asking for the
+[test] extra, so if you want to set up a virtualenv for testing, use "pip
+install -e .[test]" instead just of "pip install -e ." . At the moment this
+only includes "coverage" and "pyflakes", but in the future it might include
+"mock" and other utility libraries.

tox.ini

@@ -8,13 +8,15 @@ envlist = py27
 
 [testenv]
 passenv = USERPROFILE HOMEDRIVE HOMEPATH
+deps = .[test]
 commands =
          tahoe --version
          trial --rterrors {posargs:allmydata}
 
 [testenv:deprecations]
 basepython=python2.7
 passenv = USERPROFILE HOMEDRIVE HOMEPATH
+deps = .[test]
 setenv =
          PYTHONWARNINGS=default::DeprecationWarning
 commands =
@@ -26,6 +28,7 @@ passenv = USERPROFILE HOMEDRIVE HOMEPATH
 setenv =
          PYTHONWARNINGS=default::DeprecationWarning
 deps =
+     .[test]
      git+https://github.com/twisted/twisted
      git+https://github.com/warner/foolscap
 commands =