diff options
Diffstat (limited to 'Tests/subset/subset_test.py')
| -rw-r--r-- | Tests/subset/subset_test.py | 37 |
1 files changed, 34 insertions, 3 deletions
diff --git a/Tests/subset/subset_test.py b/Tests/subset/subset_test.py index 370f9b62..6fa1bf60 100644 --- a/Tests/subset/subset_test.py +++ b/Tests/subset/subset_test.py @@ -1,5 +1,5 @@ import io -from fontTools.misc.py23 import * +from fontTools.misc.py23 import tobytes, tostr from fontTools.misc.testTools import getXML from fontTools import subset from fontTools.fontBuilder import FontBuilder @@ -762,6 +762,37 @@ class SubsetTest(unittest.TestCase): subsetfont = TTFont(subsetpath) self.expect_ttx(subsetfont, self.getpath("CmapSubsetTest.subset.ttx"), ["cmap"]) + def test_GPOS_PairPos_Format2_useClass0(self): + # Check two things related to class 0 ('every other glyph'): + # 1) that it's reused for ClassDef1 when it becomes empty as the subset glyphset + # is intersected with the table's Coverage + # 2) that it is never reused for ClassDef2 even when it happens to become empty + # because of the subset glyphset. In this case, we don't keep a PairPosClass2 + # subtable if only ClassDef2's class0 survived subsetting. + # The test font (from Harfbuzz test suite) is constructed to trigger these two + # situations depending on the input subset --text. + # https://github.com/fonttools/fonttools/pull/2221 + _, fontpath = self.compile_font( + self.getpath("GPOS_PairPos_Format2_PR_2221.ttx"), ".ttf" + ) + subsetpath = self.temp_path(".ttf") + + for n, text in enumerate("!#", start=1): + expected_ttx = self.getpath( + f"GPOS_PairPos_Format2_ClassDef{n}_useClass0.subset.ttx" + ) + with self.subTest(text=text, expected_ttx=expected_ttx): + subset.main( + [ + fontpath, + f"--text='{text}'", + "--layout-features+=test", + "--output-file=%s" % subsetpath, + ] + ) + subsetfont = TTFont(subsetpath) + self.expect_ttx(subsetfont, expected_ttx, ["GPOS"]) + @pytest.fixture def featureVarsTestFont(): @@ -859,7 +890,7 @@ def test_subset_single_pos_format(): ' <LookupFlag value="0"/>', ' <!-- SubTableCount=1 -->', ' <SinglePos index="0" Format="2">', - ' <Coverage Format="1">', + ' <Coverage>', ' <Glyph value="a"/>', ' <Glyph value="b"/>', ' <Glyph value="c"/>', @@ -886,7 +917,7 @@ def test_subset_single_pos_format(): ' <LookupFlag value="0"/>', ' <!-- SubTableCount=1 -->', ' <SinglePos index="0" Format="1">', - ' <Coverage Format="1">', + ' <Coverage>', ' <Glyph value="a"/>', ' <Glyph value="c"/>', ' </Coverage>', |