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from plasTeX.TeX import TeX
from helpers.utils import compare_output
def test_expandafter():
compare_output(r'\def\a[#1]{Argument is #1!}\def\args{[FOO]}\expandafter\a\args')
def test_expandafter_undefined():
compare_output(r'\def\xx{\yy}\expandafter\def\xx{a}\yy')
def test_expandafter_def_csname():
compare_output(r'\expandafter\def\csname xx\endcsname{a}\xx')
def test_expandafter_let_csname():
compare_output(r'\expandafter\let\csname xx\endcsname=a\xx')
def test_expandafter_once():
compare_output(r'\def\a{ab}\def\b{\a}\def\foo#1{#1.}\expandafter\foo\b')
def test_expandafter_non_macro():
compare_output(r'\def\foo#1{#1.}\expandafter\foo ab')
def test_evil_double_dollars():
tex = TeX()
tex.input('$a$$b$')
nodes = tex.parse().getElementsByTagName('math')
assert len(nodes) == 2
assert nodes[0].textContent == 'a'
assert nodes[1].textContent == 'b'
def test_more_evil_double_dollars():
tex = TeX()
tex.input('$a$$$b$$$c$')
doc = tex.parse()
mathnodes = doc.getElementsByTagName('math')
assert len(mathnodes) == 2
assert mathnodes[0].textContent == 'a'
assert mathnodes[1].textContent == 'c'
displaymathnodes = doc.getElementsByTagName('displaymath')
assert len(displaymathnodes) == 1
assert displaymathnodes[0].textContent == 'b'
def test_even_more_evil_double_dollars():
tex = TeX()
tex.input('$a$$$$$$$b$$')
doc = tex.parse()
mathnodes = doc.getElementsByTagName('math')
assert len(mathnodes) == 1
assert mathnodes[0].textContent == 'a'
displaymathnodes = doc.getElementsByTagName('displaymath')
assert len(displaymathnodes) == 2
assert displaymathnodes[0].textContent == ''
assert displaymathnodes[1].textContent == 'b'
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