AsciiDoc Tests
==============

AsciiDoc includes 'testasciidoc', a Python script runs a set of
AsciiDoc conformance tests. 'testasciidoc' runs through a list of
AsciiDoc source files, generates backend outputs and then compares
them to expected result files. The whole process is driven by a
configuration file containing a list of user configurable test
specifications.


Rationale
---------
When modifying AsciiDoc configuration files or source code it's very
easy to introduce regression errors. 'testasciidoc' is a tool for
writing many and varied test cases that can be run after changes have
been made in order to verify that existing behavior has not been
broken.

The 'testasciidoc' 'update' command automates the (re)generation of
expected test result data.  Result data regeneration has to be
performed after changes to test case source files or after legitimate
changes to the AsciiDoc output formats -- doing this manually is
prohibitively tedious.


Running testasciidoc
--------------------
The `testasciidoc.py` script and the default `testasciidoc.conf`
configuration file are located in the AsciiDoc distribution `tests`
directory.

To view the command usage run:

---------------------------------------------------------------------
$ python tests/testasciidoc.py
Usage: testasciidoc.py [OPTIONS] COMMAND

Run AsciiDoc conformance tests specified in configuration FILE.

Commands:
  list                          List tests
  run [NUMBER] [BACKEND]        Execute tests
  update [NUMBER] [BACKEND]     Regenerate and update test data

Options:
  -f, --conf-file=CONF_FILE
        Use configuration file CONF_FILE (default configuration file is
        testasciidoc.conf in testasciidoc.py directory)
  --force
        Update all test data overwriting existing data
---------------------------------------------------------------------

To view the list of tests in the default `testasciidoc.conf`
configuration file run the 'list' command:

---------------------------------------------------------------------
$ python tests/testasciidoc.py list
1: Test cases
2: Tables
3: Source highlighter
4: Example article
5: Example book
6: Example multi-part book
7: !User Guide
---------------------------------------------------------------------

The '!' prefix signals that a test is currently disabled.

Before running the tests you will need to regenerate the expected
outputs by running the 'update' command:

---------------------------------------------------------------------
$ python tests/testasciidoc.py update
WRITING: tests/data/testcases-html4.html
WRITING: tests/data/testcases-xhtml11.html
WRITING: tests/data/testcases-docbook.xml
 :
WRITING: tests/data/book-multi-docbook.xml
---------------------------------------------------------------------

Now you can run the tests:

---------------------------------------------------------------------
$ python tests/testasciidoc.py run
1: Test cases
SOURCE: asciidoc: tests/data/testcases.txt
PASSED: html4: tests/data/testcases-html4.html
PASSED: xhtml11: tests/data/testcases-xhtml11.html
PASSED: docbook: tests/data/testcases-docbook.xml
 :
6: Example multi-part book
SOURCE: asciidoc: doc/book-multi.txt
PASSED: html4: tests/data/book-multi-html4.html
PASSED: xhtml11: tests/data/book-multi-xhtml11.html
PASSED: docbook: tests/data/book-multi-docbook.xml

TOTAL PASSED:  18
---------------------------------------------------------------------

[NOTE]
=====================================================================
- 'testasciidoc' requires AsciiDoc is located in your environment
  search path, if not you'll need to set the `ASCIIDOC_PY` environment
  variable to point to `asciidoc.py`.
- If you don't have GNU source-highlight installed you should disable
  the 'Tables' and 'Source highlighter' tests in the
  `tests/testasciidoc.conf` configuration file.
=====================================================================


testasciidoc commands
---------------------
'list'::
  List test numbers and titles.  A '!' title prefix signals that a
  test is currently disabled.

'run'::
  Read and execute tests from the test configuration file. A test
  specifies AsciiDoc test case source file and command options.  The
  test compares generated outputs to expected outputs and any
  differences displayed as a diff.  You can run selected tests by
  specifying the test number and/or backend after the `run` command.
  Examples:

  python tests/testasciidoc.py run
  python tests/testasciidoc.py run 3
  python tests/testasciidoc.py run html4
  python tests/testasciidoc.py run 3 html4

'update'::
  Generates and updates missing and out of date test output data
  files, this eliminates one of the most time consuming aspect of test
  management.  Use the `--force` option to force updates. The
  `--force` option also removes unused backend output files.
  Examples:

  python tests/testasciidoc.py update
  python tests/testasciidoc.py --force update 4

NOTE: You can run or update disabled tests by explicitly specifying
the test number.


Test configuration file
-----------------------
The tests configuration file format consists of one or more test specs
separated by a line of one or more percent characters. Each test spec
consists of an optional test title and description followed by one or
more optional directives (a directive starts with a percent
character).  A 'directive' consists begins with a line containing a '%'
character followed by a directive name followed by zero or more lines
of directive data.

Test spec format
~~~~~~~~~~~~~~~~
---------------------------------------------------------------------
Optional test title
Optional test description...

% options
Optional list of command-line option tuples.

% attributes
Optional dictionary of attribute values.

% source
AsciiDoc source file name.

% backends
Optional list of backends to be tested(default is all backends).
---------------------------------------------------------------------

Example test spec:

---------------------------------------------------------------------
Example book

% options
['--section-numbers',('--doctype','book')]

% attributes
# Exclude date from document footer.
{'docdate':None}

% source
../doc/book.txt
---------------------------------------------------------------------

TIP: Take a look at the default `tests/testasciidoc.conf`
configuration file that comes with AsciiDoc.

- Tests can be disabled by prefixing the test title with an
  exclamation '!' character.
- All relative file names are relative to the configuration file
  directory.
- Multiple tests must by separated by a `%` separator line (one or
  more percent characters).
- Lines starting with a percent character specify a test 'directive'
  and may be followed by zero or more lines of directive data.
- Directive data lines cannot start with a percent character.
- Lines starting with a `#` hash character are ignored.
- The 'source' directive data is a single line containing the
  AsciiDoc source file name.
- The 'options' directive data is a Python list of `(name,value)`
  tuples specifying AsciiDoc command-line options. A string item is
  equivalent to a `(name,None)` tuple.
- The 'attributes' directive data specifies a Python dictionary
  containing AsciiDoc attributes to be passed to AsciiDoc.

globals directive
~~~~~~~~~~~~~~~~~
An optional 'globals' directive can precede all test specs, the
globals directive data is a Python dictionary containing global
values.  Currently the only global is 'datadir', the directory
containing expected output files (defaults to configuration file
directory). For example:

---------------------------------------------------------------------
% globals
{'datadir': 'data'}
---------------------------------------------------------------------

Expected output test data files are stored in the 'datadir' and are
named after the corresponding AsciiDoc input source file.  For example
if the AsciiDoc file name is `article.txt` then the corresponding
backend output files will be `article-html4.html`,
`article-xhtml11.html`, `article-docbook.xml` (stored in the 'datadir'
directory).
