bookloupe test framework

                           ========================

Running existing testcases

--------------------------

The test harness (the program that runs a test) is called loupe-test. The

various testcases are stored in multiple text files, typically with a .tst

extension.

To run a testcase when all of bookloupe, loupe-test and the testcase file are

in the current directory simply do something like:

% loupe-test missing-space.tst

from a command prompt. Under MS-Windows, this is called a command window and

the prompt will normally look slightly different, eg.,

C:\DP> loupe-test missing-space.tst

To run all the tests in the current directory, do something like this:

% loupe-test *.tst

If bookloupe is not in the current directory or you want to run the testsuite

against gutcheck (the program that bookloupe is based on), then you can set an

environment variable (BOOKLOUPE) to point at it. For example, on MS-Windows

you might do:

C:\DP> set BOOKLOUPE=C:\GUTCHECK\GUTCHECK.EXE

C:\DP> loupe-test *.tst

Writing your own testcases

--------------------------

Writing a new testcase is pretty painless. Most testcases follow this simple

pattern:

		┌──────────────────────────────────────────┐

		│**************** INPUT ****************   │

		│"Look!John, over there!"                  │

		│**************** EXPECTED ****************│

		│                                          │

		│"Look!John, over there!"                  │

		│    Line 1 column 6 - Missing space?      │

		└──────────────────────────────────────────┘

The sixteen asterisks in this example form what is known as the "flag". This

flag must come before and after all tags (eg., INPUT and EXPECTED). In the

unlikely event that you need sixteen asterisks at the start of a line of text,

then simply choose a different flag and use it throughout the file (flags

can be any sequence of ASCII characters except control codes and space).

Note that the header that bookloupe and gutcheck normally output is not

included in the expected output. This avoids problems with not knowing

beforehand the name of the file that bookloupe/gutcheck will be asked to

look at (and saves typing!). bookloupe (and gutcheck) prints a blank line

before each warning. These are not part of the header and so do need to

be included.

To test that bookloupe produces no output, you still need to include

an EXPECTED tag, just with no text following it. If there is no EXPECTED

tag, then loupe-test will consider that no expectation exists and won't

check the output at all.

Non-ASCII testcases

-------------------

The testcase definitions (the .tst files) are always written in UTF-8

which is a superset of ASCII. Since gutcheck does not understand UTF-8

this causes a problem when it is desired to include characters that

are not in ASCII in a testcase. To solve this problem it is possible

to specify an encoding to use for the test. It is very important to

undertand that this specifies the encoding that loupe-test will use to

talk to bookloupe/gutcheck and _not_ the encoding of the .tst file

(which remains UTF-8). gutcheck understands Latin-1 (at least to a

limited extent), the canonical name for which is ISO-8859-1:

      ┌─────────────────────────────────────────────────────────────────┐

      │**************** ENCODING ****************                       │

      │ISO-8859-1                                                       │

      │**************** INPUT ****************                          │

      │"Hello," he said, "I wanted to bave a tête-à-tête with you."     │

      │**************** EXPECTED ****************                       │

      │                                                                 │

      │"Hello," he said, "I wanted to bave a tête-à-tête with you."     │

      │    Line 1 column 31 - Query word bave - not reporting duplicates│

      └─────────────────────────────────────────────────────────────────┘

Embedded linefeeds

------------------

One of the tests that bookloupe/gutcheck need to do is check that all

lines are ended with CR NL (as required by PG) rather than the UNIX

standard NL. loupe-test deliberately ignores the line endings in testcase

definition files and always uses CR NL. Thus there is needed a means

to embed a linefeed (aka newline) character into the input to be sent

to bookloupe/gutcheck to test that it correctly identified the problem.

loupe-test recognises the unicode symbol for linefeed (U+240A): ␊ which

can be used for this purpose instead of a normal newline.

Passing command line options

----------------------------

Some of bookloupe's functionality is only available using command line

options. loupe-test provides a means of specifying these with the

OPTIONS tag:

		┌──────────────────────────────────────────┐

                │**************** OPTIONS **************** │

                │-m                                        │

                │-d                                        │

                │**************** INPUT ****************   │

                │&ldquo;He went <i>thataway!</i>&rdquo;    │

                │**************** EXPECTED ****************│

		└──────────────────────────────────────────┘

Extra input files

-----------------

Under certain circumstances, bookloupe reads other input files than just

the ebook. These can be specified in the testcase definition file by

adding the name of the file to the INPUT tag:

       ┌───────────────────────────────────────────────────────────────┐

       │**************** OPTIONS ****************                      │

       │-u                                                             │

       │**************** INPUT(gutcheck.typ) ****************          │

       │arid                                                           │

       │**************** INPUT ****************                        │

       │I am the very model of a modern Major-General,                 │

       │I've information vegetable, animal, and mineral,               │

       │I know the kings of England, arid I quote the fights historical│

       │From Marathon to Waterloo, in order categorical;               │

       │I'm very well acquainted, too, with matters mathematical,      │

       │I understand equations, both the simple and quadratical,       │

       │About binomial theorem I'm teeming with a lot o' news--        │

       │With many cheerful facts about the square of the hypotenuse.   │

       │**************** EXPECTED ****************                     │

       │                                                               │

       │I know the kings of England, arid I quote the fights historical│

       │    Line 3 column 29 - Query possible scanno arid              │

       └───────────────────────────────────────────────────────────────┘

Caveats

-------

There is no support yet for testcases which are expected to fail.