History

Khaled Hosny b7f1bbc2f8 [test] Fix printing subprocess error messages Decode the string as Python 3 returns bytes string, and also don’t assume that it ends with a new line.		2018-09-22 17:20:06 +02:00
..
data	[dfont] Fix test expecatation and minor touch up	2018-09-11 17:18:21 +02:00
texts/in-house	[test] Add Khmer test texts from recent bugs	2018-07-31 13:56:55 -07:00
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	Actual py3 compatibility making on gen-* scripts (#941 )	2018-03-29 21:22:47 +04:30
record-test.sh	[test] Fix record-test to use gids not glyph-names	2018-06-04 15:38:05 -07:00
run-tests.py	[test] Fix printing subprocess error messages	2018-09-22 17:20:06 +02:00

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.