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Chun-wei Fan eda6a5ea80 CMake: Fix running tests on Windows 
For the API tests, output the test programs at $(TOP_BUILDDIR) so that
the freshly-built DLLs will be available for the test programs.  For
those that are run through the Python wrapper scripts, use
${PYTHON_EXECUTABLE} instead of plain 'python' in case the Python
interpreter is not in the PATH.
 		2018-03-13 20:17:58 +08:00
..
data [test] Add test suite for Brahmi Number Joiners 2018-02-28 16:31:46 -08:00
texts/in-house [test] Reorganize test suite 2018-01-10 02:50:49 +01:00
CMakeLists.txt CMake: Fix running tests on Windows 2018-03-13 20:17:58 +08:00
Makefile.am [test] Move test handling to sundirectories 2018-01-10 05:40:43 +01:00
README.md Let VS1 follow U+1031 MYANMAR VOWEL SIGN E 2018-02-02 12:41:07 -08:00
hb-diff [test] Use /usr/bin/env python instead of /usr/bin/python 2015-04-06 14:51:31 -07:00
hb-diff-colorize [test] Use /usr/bin/env python instead of /usr/bin/python 2015-04-06 14:51:31 -07:00
hb-diff-filter-failures [test] Use /usr/bin/env python instead of /usr/bin/python 2015-04-06 14:51:31 -07:00
hb-diff-stat [test] Use /usr/bin/env python instead of /usr/bin/python 2015-04-06 14:51:31 -07:00
hb-unicode-decode [test] Use /usr/bin/env python instead of /usr/bin/python 2015-04-06 14:51:31 -07:00
hb-unicode-encode [test] Use /usr/bin/env python instead of /usr/bin/python 2015-04-06 14:51:31 -07:00
hb-unicode-prettyname [test] Use /usr/bin/env python instead of /usr/bin/python 2015-04-06 14:51:31 -07:00
hb_test_tools.py [test] Remove unused hb-diff-ngrams 2018-01-10 02:50:49 +01:00
record-test.sh [test] Add test suite for Brahmi Number Joiners 2018-02-28 16:31:46 -08:00
run-tests.py [test] Better tests output by converting stderr to stdout (#696) 2018-01-11 08:48:22 +03:30

README.md

Adding tests

You can test shaping of a unicode sequence against a font like this:

$ ./hb-unicode-encode 41 42 43 627 | ../../util/hb-shape font.ttf

assuming an in-tree build. The 41 42 43 627 here is a sequence of Unicode codepoints: U+0041,0042,0043,0627. When you are happy with the shape results, you can use the record-test.sh script to add this to the test suite. record-test.sh requires pyftsubset to be installed. You can get pyftsubset by installing FontTools from https://github.com/behdad/fonttools.

To use record-test.sh, just put it right before the hb-shape invocation:

$ ./hb-unicode-encode 41 42 43 627 | ./record-test.sh ../../util/hb-shape font.ttf

what this does is:

  • Subset the font for the sequence of Unicode characters requested,
  • Compare the hb-shape output of the original font versus the subset font for the input sequence,
  • If the outputs differ, perhaps it is because the font does not have glyph names; it then compares the output of hb-view for both fonts.
  • If the outputs differ, recording fails. Otherwise, it will move the subset font file into data/in-house/fonts and name it after its hash, and print out the test case input, which you can then redirect to an existing or new test file in data/in-house/tests using -o=, e.g.:
$ ./hb-unicode-encode 41 42 43 627 | ./record-test.sh -o=data/in-house/tests/test-name.test ../../util/hb-shape font.ttf

If you created a new test file, add it to data/in-house/Makefile.sources so it is run. Check that make check does indeed run it, and that the test passes. When everything looks good, git add the new font as well as the new test file if you created any. You can see what new files are there by running git status data/in-house. And commit!

Note! Please only add tests using Open Source fonts, preferably under OFL or similar license.