diff options
Diffstat (limited to 'test/doc')
| -rw-r--r-- | test/doc/Makefile | 243 | ||||
| -rw-r--r-- | test/doc/conf.py | 342 | ||||
| -rw-r--r-- | test/doc/index.rst | 11 | ||||
| -rw-r--r-- | test/doc/indices.rst | 6 | ||||
| -rw-r--r-- | test/doc/overview.rst | 418 |
5 files changed, 1020 insertions, 0 deletions
diff --git a/test/doc/Makefile b/test/doc/Makefile new file mode 100644 index 00000000..ff96b5fd --- /dev/null +++ b/test/doc/Makefile @@ -0,0 +1,243 @@ +# Makefile for Sphinx documentation +# + +# You can set these variables from the command line. +SPHINXOPTS = +SRC_DOC_DIR = $(WS_ROOT)/test/doc +SPHINXBUILD = sphinx-build +PAPER = +BUILD_DOC_ROOT = $(BR)/test-doc +BUILD_DOC_DIR = $(BUILD_DOC_ROOT)/build +API_DOC_GEN_DIR = $(BUILD_DOC_ROOT)/apidoc + +# Internal variables. +PAPEROPT_a4 = -D latex_paper_size=a4 +PAPEROPT_letter = -D latex_paper_size=letter +ALLSPHINXOPTS = -d $(BUILD_DOC_DIR)/.sphinx-cache $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) $(API_DOC_GEN_DIR) -c $(SRC_DOC_DIR) +# the i18n builder cannot share the environment and doctrees with the others +I18NSPHINXOPTS = $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) . +IN_VENV:=$(shell if pip -V | grep "virtualenv" 2>&1 > /dev/null; then echo 1; else echo 0; fi) + +.PHONY: verify-virtualenv +verify-virtualenv: +ifeq ($(IN_VENV),0) + $(error "Not running inside virtualenv (are you running 'make test-doc' from root?)") +endif + +.PHONY: regen-api-doc +regen-api-doc: verify-virtualenv + @mkdir -p $(API_DOC_GEN_DIR) + @cp $(SRC_DOC_DIR)/index.rst $(API_DOC_GEN_DIR) + @cp $(SRC_DOC_DIR)/indices.rst $(API_DOC_GEN_DIR) + @cp $(SRC_DOC_DIR)/overview.rst $(API_DOC_GEN_DIR) + sphinx-apidoc -o $(API_DOC_GEN_DIR) -H "Module documentation" .. + +.PHONY: help +help: + @echo "Please use \`make <target>' where <target> is one of" + @echo " html to make standalone HTML files" + @echo " dirhtml to make HTML files named index.html in directories" + @echo " singlehtml to make a single large HTML file" + @echo " pickle to make pickle files" + @echo " json to make JSON files" + @echo " htmlhelp to make HTML files and a HTML help project" + @echo " qthelp to make HTML files and a qthelp project" + @echo " applehelp to make an Apple Help Book" + @echo " devhelp to make HTML files and a Devhelp project" + @echo " epub to make an epub" + @echo " epub3 to make an epub3" + @echo " latex to make LaTeX files, you can set PAPER=a4 or PAPER=letter" + @echo " latexpdf to make LaTeX files and run them through pdflatex" + @echo " latexpdfja to make LaTeX files and run them through platex/dvipdfmx" + @echo " text to make text files" + @echo " man to make manual pages" + @echo " texinfo to make Texinfo files" + @echo " info to make Texinfo files and run them through makeinfo" + @echo " gettext to make PO message catalogs" + @echo " changes to make an overview of all changed/added/deprecated items" + @echo " xml to make Docutils-native XML files" + @echo " pseudoxml to make pseudoxml-XML files for display purposes" + @echo " linkcheck to check all external links for integrity" + @echo " doctest to run all doctests embedded in the documentation (if enabled)" + @echo " coverage to run coverage check of the documentation (if enabled)" + @echo " dummy to check syntax errors of document sources" + +.PHONY: wipe +wipe: + rm -rf $(BUILD_DOC_ROOT) + +.PHONY: html +html: regen-api-doc verify-virtualenv + $(SPHINXBUILD) -b html $(ALLSPHINXOPTS) $(BUILD_DOC_DIR)/html + @echo + @echo "Build finished. The HTML pages are in $(BUILD_DOC_DIR)/html." + +.PHONY: dirhtml +dirhtml: regen-api-doc verify-virtualenv + $(SPHINXBUILD) -b dirhtml $(ALLSPHINXOPTS) $(BUILD_DOC_DIR)/dirhtml + @echo + @echo "Build finished. The HTML pages are in $(BUILD_DOC_DIR)/dirhtml." + +.PHONY: singlehtml +singlehtml: regen-api-doc verify-virtualenv + $(SPHINXBUILD) -b singlehtml $(ALLSPHINXOPTS) $(BUILD_DOC_DIR)/singlehtml + @echo + @echo "Build finished. The HTML page is in $(BUILD_DOC_DIR)/singlehtml." + +.PHONY: pickle +pickle: regen-api-doc verify-virtualenv + $(SPHINXBUILD) -b pickle $(ALLSPHINXOPTS) $(BUILD_DOC_DIR)/pickle + @echo + @echo "Build finished; now you can process the pickle files." + +.PHONY: json +json: regen-api-doc verify-virtualenv + $(SPHINXBUILD) -b json $(ALLSPHINXOPTS) $(BUILD_DOC_DIR)/json + @echo + @echo "Build finished; now you can process the JSON files." + +.PHONY: htmlhelp +htmlhelp: regen-api-doc verify-virtualenv + $(SPHINXBUILD) -b htmlhelp $(ALLSPHINXOPTS) $(BUILD_DOC_DIR)/htmlhelp + @echo + @echo "Build finished; now you can run HTML Help Workshop with the" \ + ".hhp project file in $(BUILD_DOC_DIR)/htmlhelp." + +.PHONY: qthelp +qthelp: regen-api-doc verify-virtualenv + $(SPHINXBUILD) -b qthelp $(ALLSPHINXOPTS) $(BUILD_DOC_DIR)/qthelp + @echo + @echo "Build finished; now you can run "qcollectiongenerator" with the" \ + ".qhcp project file in $(BUILD_DOC_DIR)/qthelp, like this:" + @echo "# qcollectiongenerator $(BUILD_DOC_DIR)/qthelp/VPPtestframework.qhcp" + @echo "To view the help file:" + @echo "# assistant -collectionFile $(BUILD_DOC_DIR)/qthelp/VPPtestframework.qhc" + +.PHONY: applehelp +applehelp: regen-api-doc verify-virtualenv + $(SPHINXBUILD) -b applehelp $(ALLSPHINXOPTS) $(BUILD_DOC_DIR)/applehelp + @echo + @echo "Build finished. The help book is in $(BUILD_DOC_DIR)/applehelp." + @echo "N.B. You won't be able to view it unless you put it in" \ + "~/Library/Documentation/Help or install it in your application" \ + "bundle." + +.PHONY: devhelp +devhelp: regen-api-doc verify-virtualenv + $(SPHINXBUILD) -b devhelp $(ALLSPHINXOPTS) $(BUILD_DOC_DIR)/devhelp + @echo + @echo "Build finished." + @echo "To view the help file:" + @echo "# mkdir -p $$HOME/.local/share/devhelp/VPPtestframework" + @echo "# ln -s $(BUILD_DOC_DIR)/devhelp $$HOME/.local/share/devhelp/VPPtestframework" + @echo "# devhelp" + +.PHONY: epub +epub: regen-api-doc verify-virtualenv + $(SPHINXBUILD) -b epub $(ALLSPHINXOPTS) $(BUILD_DOC_DIR)/epub + @echo + @echo "Build finished. The epub file is in $(BUILD_DOC_DIR)/epub." + +.PHONY: epub3 +epub3: + $(SPHINXBUILD) -b epub3 $(ALLSPHINXOPTS) $(BUILD_DOC_DIR)/epub3 + @echo + @echo "Build finished. The epub3 file is in $(BUILD_DOC_DIR)/epub3." + +.PHONY: latex +latex: regen-api-doc verify-virtualenv + $(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILD_DOC_DIR)/latex + @echo + @echo "Build finished; the LaTeX files are in $(BUILD_DOC_DIR)/latex." + @echo "Run \`make' in that directory to run these through (pdf)latex" \ + "(use \`make latexpdf' here to do that automatically)." + +.PHONY: latexpdf +latexpdf: regen-api-doc verify-virtualenv + $(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILD_DOC_DIR)/latex + @echo "Running LaTeX files through pdflatex..." + $(MAKE) -C $(BUILD_DOC_DIR)/latex all-pdf + @echo "pdflatex finished; the PDF files are in $(BUILD_DOC_DIR)/latex." + +.PHONY: latexpdfja +latexpdfja: regen-api-doc verify-virtualenv + $(SPHINXBUILD) -b latex $(ALLSPHINXOPTS) $(BUILD_DOC_DIR)/latex + @echo "Running LaTeX files through platex and dvipdfmx..." + $(MAKE) -C $(BUILD_DOC_DIR)/latex all-pdf-ja + @echo "pdflatex finished; the PDF files are in $(BUILD_DOC_DIR)/latex." + +.PHONY: text +text: regen-api-doc verify-virtualenv + $(SPHINXBUILD) -b text $(ALLSPHINXOPTS) $(BUILD_DOC_DIR)/text + @echo + @echo "Build finished. The text files are in $(BUILD_DOC_DIR)/text." + +.PHONY: man +man: regen-api-doc verify-virtualenv + $(SPHINXBUILD) -b man $(ALLSPHINXOPTS) $(BUILD_DOC_DIR)/man + @echo + @echo "Build finished. The manual pages are in $(BUILD_DOC_DIR)/man." + +.PHONY: texinfo +texinfo: regen-api-doc verify-virtualenv + $(SPHINXBUILD) -b texinfo $(ALLSPHINXOPTS) $(BUILD_DOC_DIR)/texinfo + @echo + @echo "Build finished. The Texinfo files are in $(BUILD_DOC_DIR)/texinfo." + @echo "Run \`make' in that directory to run these through makeinfo" \ + "(use \`make info' here to do that automatically)." + +.PHONY: info +info: regen-api-doc verify-virtualenv + $(SPHINXBUILD) -b texinfo $(ALLSPHINXOPTS) $(BUILD_DOC_DIR)/texinfo + @echo "Running Texinfo files through makeinfo..." + make -C $(BUILD_DOC_DIR)/texinfo info + @echo "makeinfo finished; the Info files are in $(BUILD_DOC_DIR)/texinfo." + +.PHONY: gettext +gettext: regen-api-doc verify-virtualenv + $(SPHINXBUILD) -b gettext $(I18NSPHINXOPTS) $(BUILD_DOC_DIR)/locale + @echo + @echo "Build finished. The message catalogs are in $(BUILD_DOC_DIR)/locale." + +.PHONY: changes +changes: regen-api-doc verify-virtualenv + $(SPHINXBUILD) -b changes $(ALLSPHINXOPTS) $(BUILD_DOC_DIR)/changes + @echo + @echo "The overview file is in $(BUILD_DOC_DIR)/changes." + +.PHONY: linkcheck +linkcheck: regen-api-doc verify-virtualenv + $(SPHINXBUILD) -b linkcheck $(ALLSPHINXOPTS) $(BUILD_DOC_DIR)/linkcheck + @echo + @echo "Link check complete; look for any errors in the above output " \ + "or in $(BUILD_DOC_DIR)/linkcheck/output.txt." + +.PHONY: doctest +doctest: regen-api-doc verify-virtualenv + $(SPHINXBUILD) -b doctest $(ALLSPHINXOPTS) $(BUILD_DOC_DIR)/doctest + @echo "Testing of doctests in the sources finished, look at the " \ + "results in $(BUILD_DOC_DIR)/doctest/output.txt." + +.PHONY: coverage +coverage: regen-api-doc verify-virtualenv + $(SPHINXBUILD) -b coverage $(ALLSPHINXOPTS) $(BUILD_DOC_DIR)/coverage + @echo "Testing of coverage in the sources finished, look at the " \ + "results in $(BUILD_DOC_DIR)/coverage/python.txt." + +.PHONY: xml +xml: regen-api-doc verify-virtualenv + $(SPHINXBUILD) -b xml $(ALLSPHINXOPTS) $(BUILD_DOC_DIR)/xml + @echo + @echo "Build finished. The XML files are in $(BUILD_DOC_DIR)/xml." + +.PHONY: pseudoxml +pseudoxml: regen-api-doc verify-virtualenv + $(SPHINXBUILD) -b pseudoxml $(ALLSPHINXOPTS) $(BUILD_DOC_DIR)/pseudoxml + @echo + @echo "Build finished. The pseudo-XML files are in $(BUILD_DOC_DIR)/pseudoxml." + +.PHONY: dummy +dummy: regen-api-doc verify-virtualenv + $(SPHINXBUILD) -b dummy $(ALLSPHINXOPTS) $(BUILD_DOC_DIR)/dummy + @echo + @echo "Build finished. Dummy builder generates no files." diff --git a/test/doc/conf.py b/test/doc/conf.py new file mode 100644 index 00000000..ec8958ea --- /dev/null +++ b/test/doc/conf.py @@ -0,0 +1,342 @@ +# -*- coding: utf-8 -*- +# +# VPP test framework documentation build configuration file, created by +# sphinx-quickstart on Thu Oct 13 08:45:03 2016. +# +# This file is execfile()d with the current directory set to its +# containing dir. +# +# Note that not all possible configuration values are present in this +# autogenerated file. +# +# All configuration values have a default; values that are commented out +# serve to show the default. + +# If extensions (or modules to document with autodoc) are in another directory, +# add these directories to sys.path here. If the directory is relative to the +# documentation root, use os.path.abspath to make it absolute, like shown here. +# +import os +import sys +sys.path.insert(0, os.path.abspath('..')) + + +# -- General configuration ------------------------------------------------ + +# If your documentation needs a minimal Sphinx version, state it here. +# +# needs_sphinx = '1.0' + +# Add any Sphinx extension module names here, as strings. They can be +# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom +# ones. +extensions = [ + 'sphinx.ext.autodoc', +] + +# Add any paths that contain templates here, relative to this directory. +templates_path = ['_templates'] + +# The suffix(es) of source filenames. +# You can specify multiple suffix as a list of string: +# +# source_suffix = ['.rst', '.md'] +source_suffix = '.rst' + +# The encoding of source files. +# +# source_encoding = 'utf-8-sig' + +# The master toctree document. +master_doc = 'index' + +# General information about the project. +project = u'VPP test framework' +copyright = u'2016, VPP team' +author = u'VPP team' + +# The version info for the project you're documenting, acts as replacement for +# |version| and |release|, also used in various other places throughout the +# built documents. +# +# The short X.Y version. +version = u'0.1' +# The full version, including alpha/beta/rc tags. +release = u'0.1' + +# The language for content autogenerated by Sphinx. Refer to documentation +# for a list of supported languages. +# +# This is also used if you do content translation via gettext catalogs. +# Usually you set "language" from the command line for these cases. +language = None + +# There are two options for replacing |today|: either, you set today to some +# non-false value, then it is used: +# +# today = '' +# +# Else, today_fmt is used as the format for a strftime call. +# +# today_fmt = '%B %d, %Y' + +# List of patterns, relative to source directory, that match files and +# directories to ignore when looking for source files. +# This patterns also effect to html_static_path and html_extra_path +exclude_patterns = ['_build', 'Thumbs.db', '.DS_Store'] + +# The reST default role (used for this markup: `text`) to use for all +# documents. +# +default_role = 'any' + +# If true, '()' will be appended to :func: etc. cross-reference text. +# +add_function_parentheses = True + +# If true, the current module name will be prepended to all description +# unit titles (such as .. function::). +# +# add_module_names = True + +# If true, sectionauthor and moduleauthor directives will be shown in the +# output. They are ignored by default. +# +# show_authors = False + +# The name of the Pygments (syntax highlighting) style to use. +pygments_style = 'sphinx' + +# A list of ignored prefixes for module index sorting. +# modindex_common_prefix = [] + +# If true, keep warnings as "system message" paragraphs in the built documents. +# keep_warnings = False + +# If true, `todo` and `todoList` produce output, else they produce nothing. +todo_include_todos = False + + +# -- Options for HTML output ---------------------------------------------- + +# The theme to use for HTML and HTML Help pages. See the documentation for +# a list of builtin themes. +# +#html_theme = 'alabaster' +html_theme = 'sphinx_rtd_theme' + +# Theme options are theme-specific and customize the look and feel of a theme +# further. For a list of options available for each theme, see the +# documentation. +# +# html_theme_options = {} + +# Add any paths that contain custom themes here, relative to this directory. +# html_theme_path = [] + +# The name for this set of Sphinx documents. +# "<project> v<release> documentation" by default. +# +# html_title = u'VPP test framework v0.1' + +# A shorter title for the navigation bar. Default is the same as html_title. +# +# html_short_title = None + +# The name of an image file (relative to this directory) to place at the top +# of the sidebar. +# +# html_logo = None + +# The name of an image file (relative to this directory) to use as a favicon of +# the docs. This file should be a Windows icon file (.ico) being 16x16 or 32x32 +# pixels large. +# +# html_favicon = None + +# Add any paths that contain custom static files (such as style sheets) here, +# relative to this directory. They are copied after the builtin static files, +# so a file named "default.css" will overwrite the builtin "default.css". +# html_static_path = [] + +# Add any extra paths that contain custom files (such as robots.txt or +# .htaccess) here, relative to this directory. These files are copied +# directly to the root of the documentation. +# +# html_extra_path = [] + +# If not None, a 'Last updated on:' timestamp is inserted at every page +# bottom, using the given strftime format. +# The empty string is equivalent to '%b %d, %Y'. +# +# html_last_updated_fmt = None + +# If true, SmartyPants will be used to convert quotes and dashes to +# typographically correct entities. +# +# html_use_smartypants = True + +# Custom sidebar templates, maps document names to template names. +# +# html_sidebars = {} + +# Additional templates that should be rendered to pages, maps page names to +# template names. +# +# html_additional_pages = {} + +# If false, no module index is generated. +# +# html_domain_indices = True + +# If false, no index is generated. +# +# html_use_index = True + +# If true, the index is split into individual pages for each letter. +# +# html_split_index = False + +# If true, links to the reST sources are added to the pages. +# +# html_show_sourcelink = True + +# If true, "Created using Sphinx" is shown in the HTML footer. Default is True. +# +# html_show_sphinx = True + +# If true, "(C) Copyright ..." is shown in the HTML footer. Default is True. +# +# html_show_copyright = True + +# If true, an OpenSearch description file will be output, and all pages will +# contain a <link> tag referring to it. The value of this option must be the +# base URL from which the finished HTML is served. +# +# html_use_opensearch = '' + +# This is the file name suffix for HTML files (e.g. ".xhtml"). +# html_file_suffix = None + +# Language to be used for generating the HTML full-text search index. +# Sphinx supports the following languages: +# 'da', 'de', 'en', 'es', 'fi', 'fr', 'hu', 'it', 'ja' +# 'nl', 'no', 'pt', 'ro', 'ru', 'sv', 'tr', 'zh' +# +# html_search_language = 'en' + +# A dictionary with options for the search language support, empty by default. +# 'ja' uses this config value. +# 'zh' user can custom change `jieba` dictionary path. +# +# html_search_options = {'type': 'default'} + +# The name of a javascript file (relative to the configuration directory) that +# implements a search results scorer. If empty, the default will be used. +# +# html_search_scorer = 'scorer.js' + +# Output file base name for HTML help builder. +htmlhelp_basename = 'VPPtestframeworkdoc' + +# -- Options for LaTeX output --------------------------------------------- + +latex_elements = { + # The paper size ('letterpaper' or 'a4paper'). + # + # 'papersize': 'letterpaper', + + # The font size ('10pt', '11pt' or '12pt'). + # + # 'pointsize': '10pt', + + # Additional stuff for the LaTeX preamble. + # + # 'preamble': '', + + # Latex figure (float) alignment + # + # 'figure_align': 'htbp', +} + +# Grouping the document tree into LaTeX files. List of tuples +# (source start file, target name, title, +# author, documentclass [howto, manual, or own class]). +latex_documents = [ + (master_doc, 'VPPtestframework.tex', u'VPP test framework Documentation', + u'VPP team', 'manual'), +] + +# The name of an image file (relative to this directory) to place at the top of +# the title page. +# +# latex_logo = None + +# For "manual" documents, if this is true, then toplevel headings are parts, +# not chapters. +# +# latex_use_parts = False + +# If true, show page references after internal links. +# +# latex_show_pagerefs = False + +# If true, show URL addresses after external links. +# +# latex_show_urls = False + +# Documents to append as an appendix to all manuals. +# +# latex_appendices = [] + +# It false, will not define \strong, \code, itleref, \crossref ... but only +# \sphinxstrong, ..., \sphinxtitleref, ... To help avoid clash with user added +# packages. +# +# latex_keep_old_macro_names = True + +# If false, no module index is generated. +# +# latex_domain_indices = True + + +# -- Options for manual page output --------------------------------------- + +# One entry per manual page. List of tuples +# (source start file, name, description, authors, manual section). +man_pages = [ + (master_doc, 'vpptestframework', u'VPP test framework Documentation', + [author], 1) +] + +# If true, show URL addresses after external links. +# +# man_show_urls = False + + +# -- Options for Texinfo output ------------------------------------------- + +# Grouping the document tree into Texinfo files. List of tuples +# (source start file, target name, title, author, +# dir menu entry, description, category) +texinfo_documents = [ + (master_doc, 'VPPtestframework', u'VPP test framework Documentation', + author, 'VPPtestframework', 'One line description of project.', + 'Miscellaneous'), +] + +# Documents to append as an appendix to all manuals. +# +# texinfo_appendices = [] + +# If false, no module index is generated. +# +# texinfo_domain_indices = True + +# How to display URL addresses: 'footnote', 'no', or 'inline'. +# +# texinfo_show_urls = 'footnote' + +# If true, do not generate a @detailmenu in the "Top" node's menu. +# +# texinfo_no_detailmenu = False diff --git a/test/doc/index.rst b/test/doc/index.rst new file mode 100644 index 00000000..62e348cd --- /dev/null +++ b/test/doc/index.rst @@ -0,0 +1,11 @@ +Contents +======== + +.. toctree:: + :numbered: + :maxdepth: 2 + :glob: + + overview + modules + indices diff --git a/test/doc/indices.rst b/test/doc/indices.rst new file mode 100644 index 00000000..d46b839f --- /dev/null +++ b/test/doc/indices.rst @@ -0,0 +1,6 @@ +Indices and tables +================== + +* :ref:`genindex` +* :ref:`modindex` +* :ref:`search` diff --git a/test/doc/overview.rst b/test/doc/overview.rst new file mode 100644 index 00000000..7b70eded --- /dev/null +++ b/test/doc/overview.rst @@ -0,0 +1,418 @@ +.. _unittest: https://docs.python.org/2/library/unittest.html +.. _TestCase: https://docs.python.org/2/library/unittest.html#unittest.TestCase +.. _AssertionError: https://docs.python.org/2/library/exceptions.html#exceptions.AssertionError +.. _SkipTest: https://docs.python.org/2/library/unittest.html#unittest.SkipTest +.. _virtualenv: http://docs.python-guide.org/en/latest/dev/virtualenvs/ +.. _scapy: http://www.secdev.org/projects/scapy/ +.. _logging: https://docs.python.org/2/library/logging.html + +.. |vtf| replace:: VPP Test Framework + +|vtf| +===== + +.. contents:: + :local: + :depth: 1 + +Overview +######## + +The goal of the |vtf| is to ease writing, running and debugging +unit tests for the VPP. For this, python was chosen as a high level language +allowing rapid development with scapy_ providing the necessary tool for creating +and dissecting packets. + +Anatomy of a test case +###################### + +Python's unittest_ is used as the base framework upon which the VPP test +framework is built. A test suite in the |vtf| consists of multiple classes +derived from `VppTestCase`, which is itself derived from TestCase_. +The test class defines one or more test functions, which act as test cases. + +Function flow when running a test case is: + +1. `setUpClass <VppTestCase.setUpClass>`: + This function is called once for each test class, allowing a one-time test + setup to be executed. If this functions throws an exception, + none of the test functions are executed. +2. `setUp <VppTestCase.setUp>`: + The setUp function runs before each of the test functions. If this function + throws an exception other than AssertionError_ or SkipTest_, then this is + considered an error, not a test failure. +3. *test_<name>*: + This is the guts of the test case. It should execute the test scenario + and use the various assert functions from the unittest framework to check + necessary. Multiple test_<name> methods can exist in a test case. +4. `tearDown <VppTestCase.tearDown>`: + The tearDown function is called after each test function with the purpose + of doing partial cleanup. +5. `tearDownClass <VppTestCase.tearDownClass>`: + Method called once after running all of the test functions to perform + the final cleanup. + +Logging +####### + +Each test case has a logger automatically created for it, stored in +'logger' property, based on logging_. Use the logger's standard methods +debug(), info(), error(), ... to emit log messages to the logger. + +All the log messages go always into a log file in temporary directory +(see below). + +To control the messages printed to console, specify the V= parameter. + +.. code-block:: shell + + make test # minimum verbosity + make test V=1 # moderate verbosity + make test V=2 # maximum verbosity + +Test temporary directory and VPP life cycle +########################################### + +Test separation is achieved by separating the test files and vpp instances. +Each test creates a temporary directory and it's name is used to create +a shared memory prefix which is used to run a VPP instance. +The temporary directory name contains the testcase class name for easy +reference, so for testcase named 'TestVxlan' the directory could be named +e.g. vpp-unittest-TestVxlan-UNUP3j. +This way, there is no conflict between any other VPP instances running +on the box and the test VPP. Any temporary files created by the test case +are stored in this temporary test directory. + +The test temporary directory holds the following interesting files: + +* log.txt - this contains the logger output on max verbosity +* pg*_in.pcap - last injected packet stream into VPP, named after the interface, + so for pg0, the file will be named pg0_in.pcap +* pg*_out.pcap - last capture file created by VPP for interface, similarly, + named after the interface, so for e.g. pg1, the file will be named + pg1_out.pcap +* history files - whenever the capture is restarted or a new stream is added, + the existing files are rotated and renamed, soo all the pcap files + are always saved for later debugging if needed +* core - if vpp dumps a core, it'll be stored in the temporary directory +* vpp_stdout.txt - file containing output which vpp printed to stdout +* vpp_stderr.txt - file containing output which vpp printed to stderr + +*NOTE*: existing temporary directories named vpp-unittest-* are automatically +removed when invoking 'make test*' or 'make retest*' to keep the temporary +directory clean. + +Virtual environment +################### + +Virtualenv_ is a python module which provides a means to create an environment +containing the dependencies required by the |vtf|, allowing a separation +from any existing system-wide packages. |vtf|'s Makefile automatically +creates a virtualenv_ inside build-root and installs the required packages +in that environment. The environment is entered whenever executing a test +via one of the make test targets. + +Naming conventions +################## + +Most unit tests do some kind of packet manipulation - sending and receiving +packets between VPP and virtual hosts connected to the VPP. Referring +to the sides, addresses, etc. is always done as if looking from the VPP side, +thus: + +* *local_* prefix is used for the VPP side. + So e.g. `local_ip4 <VppInterface.local_ip4>` address is the IPv4 address + assigned to the VPP interface. +* *remote_* prefix is used for the virtual host side. + So e.g. `remote_mac <VppInterface.remote_mac>` address is the MAC address + assigned to the virtual host connected to the VPP. + +Automatically generated addresses +################################# + +To send packets, one needs to typically provide some addresses, otherwise +the packets will be dropped. The interface objects in |vtf| automatically +provide addresses based on (typically) their indexes, which ensures +there are no conflicts and eases debugging by making the addressing scheme +consistent. + +The developer of a test case typically doesn't need to work with the actual +numbers, rather using the properties of the objects. The addresses typically +come in two flavors: '<address>' and '<address>n' - note the 'n' suffix. +The former address is a Python string, while the latter is translated using +socket.inet_pton to raw format in network byte order - this format is suitable +for passing as an argument to VPP APIs. + +e.g. for the IPv4 address assigned to the VPP interface: + +* local_ip4 - Local IPv4 address on VPP interface (string) +* local_ip4n - Local IPv4 address - raw, suitable as API parameter. + +These addresses need to be configured in VPP to be usable using e.g. +`config_ip4` API. Please see the documentation to `VppInterface` for more +details. + +By default, there is one remote address of each kind created for L3: +remote_ip4 and remote_ip6. If the test needs more addresses, because it's +simulating more remote hosts, they can be generated using +`generate_remote_hosts` API and the entries for them inserted into the ARP +table using `configure_ipv4_neighbors` API. + +Packet flow in the |vtf| +######################## + +Test framework -> VPP +~~~~~~~~~~~~~~~~~~~~~ + +|vtf| doesn't send any packets to VPP directly. Traffic is instead injected +using packet-generator interfaces, represented by the `VppPGInterface` class. +Packets are written into a temporary .pcap file, which is then read by the VPP +and the packets are injected into the VPP world. + +To add a list of packets to an interface, call the `add_stream` method on that +interface. Once everything is prepared, call `pg_start` method to start +the packet generator on the VPP side. + +VPP -> test framework +~~~~~~~~~~~~~~~~~~~~~ + +Similarly, VPP doesn't send any packets to |vtf| directly. Instead, packet +capture feature is used to capture and write traffic to a temporary .pcap file, +which is then read and analyzed by the |vtf|. + +The following APIs are available to the test case for reading pcap files. + +* `get_capture`: this API is suitable for bulk & batch style of test, where + a list of packets is prepared & sent, then the received packets are read + and verified. The API needs the number of packets which are expected to + be captured (ignoring filtered packets - see below) to know when the pcap + file is completely written by the VPP. If using packet infos for verifying + packets, then the counts of the packet infos can be automatically used + by `get_capture` to get the proper count (in this case the default value + None can be supplied as expected_count or ommitted altogether). +* `wait_for_packet`: this API is suitable for interactive style of test, + e.g. when doing session management, three-way handsakes, etc. This API waits + for and returns a single packet, keeping the capture file in place + and remembering context. Repeated invocations return following packets + (or raise Exception if timeout is reached) from the same capture file + (= packets arriving on the same interface). + +*NOTE*: it is not recommended to mix these APIs unless you understand how they +work internally. None of these APIs rotate the pcap capture file, so calling +e.g. `get_capture` after `wait_for_packet` will return already read packets. +It is safe to switch from one API to another after calling `enable_capture` +as that API rotates the capture file. + +Automatic filtering of packets: +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Both APIs (`get_capture` and `wait_for_packet`) by default filter the packet +capture, removing known uninteresting packets from it - these are IPv6 Router +Advertisments and IPv6 Router Alerts. These packets are unsolicitated +and from the point of |vtf| are random. If a test wants to receive these +packets, it should specify either None or a custom filtering function +as the value to the 'filter_out_fn' argument. + +Common API flow for sending/receiving packets: +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +We will describe a simple scenario, where packets are sent from pg0 to pg1 +interface, assuming that the interfaces were created using +`create_pg_interfaces` API. + +1. Create a list of packets for pg0:: + + packet_count = 10 + packets = create_packets(src=self.pg0, dst=self.pg1, + count=packet_count) + +2. Add that list of packets to the source interface:: + + self.pg0.add_stream(packets) + +3. Enable capture on the destination interface:: + + self.pg1.enable_capture() + +4. Start the packet generator:: + + self.pg_start() + +5. Wait for capture file to appear and read it:: + + capture = self.pg1.get_capture(expected_count=packet_count) + +6. Verify packets match sent packets:: + + self.verify_capture(send=packets, captured=capture) + +Test framework objects +###################### + +The following objects provide VPP abstraction and provide a means to do +common tasks easily in the test cases. + +* `VppInterface`: abstract class representing generic VPP interface + and contains some common functionality, which is then used by derived classes +* `VppPGInterface`: class representing VPP packet-generator interface. + The interface is created/destroyed when the object is created/destroyed. +* `VppSubInterface`: VPP sub-interface abstract class, containing common + functionality for e.g. `VppDot1QSubint` and `VppDot1ADSubint` classes + +How VPP APIs/CLIs are called +############################ + +Vpp provides python bindings in a python module called vpp-papi, which the test +framework installs in the virtual environment. A shim layer represented by +the `VppPapiProvider` class is built on top of the vpp-papi, serving these +purposes: + +1. Automatic return value checks: + After each API is called, the return value is checked against the expected + return value (by default 0, but can be overridden) and an exception + is raised if the check fails. +2. Automatic call of hooks: + + a. `before_cli <Hook.before_cli>` and `before_api <Hook.before_api>` hooks + are used for debug logging and stepping through the test + b. `after_cli <Hook.after_cli>` and `after_api <Hook.after_api>` hooks + are used for monitoring the vpp process for crashes +3. Simplification of API calls: + Many of the VPP APIs take a lot of parameters and by providing sane defaults + for these, the API is much easier to use in the common case and the code is + more readable. E.g. ip_add_del_route API takes ~25 parameters, of which + in the common case, only 3 are needed. + +Utility methods +############### + +Some interesting utility methods are: + +* `ppp`: 'Pretty Print Packet' - returns a string containing the same output + as Scapy's packet.show() would print +* `ppc`: 'Pretty Print Capture' - returns a string containing printout of + a capture (with configurable limit on the number of packets printed from it) + using `ppp` + +*NOTE*: Do not use Scapy's packet.show() in the tests, because it prints +the output to stdout. All output should go to the logger associated with +the test case. + +Example: how to add a new test +############################## + +In this example, we will describe how to add a new test case which tests +basic IPv4 forwarding. + +1. Add a new file called test_ip4_fwd.py in the test directory, starting + with a few imports:: + + from framework import VppTestCase + from scapy.layers.l2 import Ether + from scapy.packet import Raw + from scapy.layers.inet import IP, UDP + from random import randint + +2. Create a class inherited from the VppTestCase:: + + class IP4FwdTestCase(VppTestCase): + """ IPv4 simple forwarding test case """ + +2. Add a setUpClass function containing the setup needed for our test to run:: + + @classmethod + def setUpClass(self): + super(IP4FwdTestCase, self).setUpClass() + self.create_pg_interfaces(range(2)) # create pg0 and pg1 + for i in self.pg_interfaces: + i.admin_up() # put the interface up + i.config_ip4() # configure IPv4 address on the interface + i.resolve_arp() # resolve ARP, so that we know VPP MAC + +3. Create a helper method to create the packets to send:: + + def create_stream(self, src_if, dst_if, count): + packets = [] + for i in range(count): + # create packet info stored in the test case instance + info = self.create_packet_info(src_if, dst_if) + # convert the info into packet payload + payload = self.info_to_payload(info) + # create the packet itself + p = (Ether(dst=src_if.local_mac, src=src_if.remote_mac) / + IP(src=src_if.remote_ip4, dst=dst_if.remote_ip4) / + UDP(sport=randint(1000, 2000), dport=5678) / + Raw(payload)) + # store a copy of the packet in the packet info + info.data = p.copy() + # append the packet to the list + packets.append(p) + + # return the created packet list + return packets + +4. Create a helper method to verify the capture:: + + def verify_capture(self, src_if, dst_if, capture): + packet_info = None + for packet in capture: + try: + ip = packet[IP] + udp = packet[UDP] + # convert the payload to packet info object + payload_info = self.payload_to_info(str(packet[Raw])) + # make sure the indexes match + self.assert_equal(payload_info.src, src_if.sw_if_index, + "source sw_if_index") + self.assert_equal(payload_info.dst, dst_if.sw_if_index, + "destination sw_if_index") + packet_info = self.get_next_packet_info_for_interface2( + src_if.sw_if_index, + dst_if.sw_if_index, + packet_info) + # make sure we didn't run out of saved packets + self.assertIsNotNone(packet_info) + self.assert_equal(payload_info.index, packet_info.index, + "packet info index") + saved_packet = packet_info.data # fetch the saved packet + # assert the values match + self.assert_equal(ip.src, saved_packet[IP].src, + "IP source address") + # ... more assertions here + self.assert_equal(udp.sport, saved_packet[UDP].sport, + "UDP source port") + except: + self.logger.error(ppp("Unexpected or invalid packet:", + packet)) + raise + remaining_packet = self.get_next_packet_info_for_interface2( + src_if.sw_if_index, + dst_if.sw_if_index, + packet_info) + self.assertIsNone(remaining_packet, + "Interface %s: Packet expected from interface " + "%s didn't arrive" % (dst_if.name, src_if.name)) + +5. Add the test code to test_basic function:: + + def test_basic(self): + count = 10 + # create the packet stream + packets = self.create_stream(self.pg0, self.pg1, count) + # add the stream to the source interface + self.pg0.add_stream(packets) + # enable capture on both interfaces + self.pg0.enable_capture() + self.pg1.enable_capture() + # start the packet generator + self.pg_start() + # get capture - the proper count of packets was saved by + # create_packet_info() based on dst_if parameter + capture = self.pg1.get_capture() + # assert nothing captured on pg0 (always do this last, so that + # some time has already passed since pg_start()) + self.pg0.assert_nothing_captured() + # verify capture + self.verify_capture(self.pg0, self.pg1, capture) + +6. Run the test by issuing 'make test'. |