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kern table: add tests for overflowing subtable

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This commit is contained in:
Denis Moyogo Jacquerye 2018-11-05 11:34:00 +00:00
parent 46add5375d
commit 7e3164e8da
1 changed files with 51 additions and 0 deletions
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51
Tests/ttLib/tables/_k_e_r_n_test.py
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@ -5,6 +5,7 @@ from fontTools.ttLib.tables._k_e_r_n import (
KernTable_format_0, KernTable_format_unkown) KernTable_format_0, KernTable_format_unkown)
from fontTools.misc.textTools import deHexStr from fontTools.misc.textTools import deHexStr
from fontTools.misc.testTools import FakeFont, getXML, parseXML from fontTools.misc.testTools import FakeFont, getXML, parseXML
import itertools
import pytest import pytest
@ -120,12 +121,32 @@ KERN_VER_1_FMT_UNKNOWN_XML = [
'</kernsubtable>', '</kernsubtable>',
] ]
KERN_VER_0_FMT_0_OVERFLOWING_DATA = deHexStr(
'0000 ' # 0: version=0
'0001 ' # 2: nTables=1
'0000 ' # 4: version=0 (bogus field, unused)
'0274 ' # 6: length=628 (bogus value for 66164 % 0x10000)
'00 ' # 8: format=0
'01 ' # 9: coverage=1
'2B11 ' # 10: nPairs=11025
'C000 ' # 12: searchRange=49152
'000D ' # 14: entrySelector=13
'4266 ' # 16: rangeShift=16998
) + deHexStr(' '.join(
'%04X %04X %04X' % (a, b, 0)
for (a, b) in itertools.product(range(105), repeat=2)
))
@pytest.fixture @pytest.fixture
def font(): def font():
return FakeFont(list("ABCDEFGHIJKLMNOPQRSTUVWXYZ" return FakeFont(list("ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"abcdefghijklmnopqrstuvwxyz")) "abcdefghijklmnopqrstuvwxyz"))
@pytest.fixture
def overflowing_font():
return FakeFont(["glyph%i" % i for i in range(105)])
class KernTableTest(object): class KernTableTest(object):
@ -364,6 +385,36 @@ class KernTable_format_0_Test(object):
assert subtable[("B", "D")] == 1 assert subtable[("B", "D")] == 1
assert subtable[("B", "glyph65535")] == 2 assert subtable[("B", "glyph65535")] == 2
def test_compileOverflowingSubtable(self, overflowing_font):
font = overflowing_font
kern = newTable("kern")
kern.version = 0
st = KernTable_format_0(0)
kern.kernTables = [st]
st.coverage = 1
st.tupleIndex = None
st.kernTable = {
(a, b): 0
for (a, b) in itertools.product(
font.getGlyphOrder(), repeat=2)
}
assert len(st.kernTable) == 11025
data = kern.compile(font)
assert data == KERN_VER_0_FMT_0_OVERFLOWING_DATA
def test_decompileOverflowingSubtable(self, overflowing_font):
font = overflowing_font
data = KERN_VER_0_FMT_0_OVERFLOWING_DATA
kern = newTable("kern")
kern.decompile(data, font)
st = kern.kernTables[0]
assert st.kernTable == {
(a, b): 0
for (a, b) in itertools.product(
font.getGlyphOrder(), repeat=2)
}
if __name__ == "__main__": if __name__ == "__main__":
import sys import sys