def test_stack_pop(self):
t = Transition(fr='start', to='end', match='test', pop=True)
state = 'start'
stack = [('x', 'value')]
token = 'test'
t.apply(state, stack, token)
assert len(stack) == 0
def test_stack_push(self):
t = Transition(fr='start', to='end', match='test', param='t')
state = 'start'
stack = []
token = 'test'
t.apply(state, stack, token)
assert len(stack) == 1 and stack[0] == ('t', 'test')
def test_complex_param_extraction(self):
# cargo new [binary | lib] [using [rust | edition] <edition>]
# (called | named) <name>
p = Parser(start='start',
end='end',
transitions=[
Transition(fr='start', to='cargo', match='cargo'),
Transition(fr='cargo', to='new', match='new'),
Transition(fr='new', to='binlib', match='(binary|lib)'),
Transition(fr='new', to='using', match='using'),
Transition(fr='new',
to='called',
match='(called|named)'),
Transition(fr='binlib', to='using', match='using'),
Transition(fr='using',
to='edition',
match='(Rust|edition)'),
Transition(fr='edition',
to='called',
match='\d{4}',
param='edition'),
Transition(fr='called',
to='name',
match='(called|named)'),
Transition(fr='name',
to='end',
match='.*',
param='name')
])
valid_inputs = [
'cargo new called test', 'cargo new binary called test',
'cargo new lib called test', 'cargo new using 2018 called test',
'cargo new binary using 2018 named test',
'cargo new lib using Rust 2018 named test',
'cargo new lib using edition 2018 called test'
]
for input_ in valid_inputs:
args = p.parse(input_)
edition = args.get('edition')
assert edition is None or edition == '2018'
assert 'name' in args and args['name'] == 'test'
def test_complex_param_extraction(self):
# cargo new [binary | lib] [using [rust | edition] <edition>]
# (called | named) <name>
p = Parser(start='start',
end='end',
transitions=[
Transition(fr='start', to='cargo', match='cargo'),
Transition(fr='cargo', to='new', match='new'),
Transition(fr='new', to='binlib', match='(binary|lib)'),
Transition(fr='new', to='using', match='using'),
Transition(fr='new',
to='called',
match='(called|named)'),
Transition(fr='binlib', to='using', match='using'),
Transition(fr='using',
to='edition',
match='(Rust|edition)'),
Transition(fr='edition',
to='called',
match='\d{4}',
param='edition'),
Transition(fr='called',
to='name',
match='(called|named)'),
Transition(fr='name',
to='end',
match='.*',
param='name')
])
invalid_inputs = [
'cargo called test',
'cargo new test',
'cargo new lib test',
'cargo new 2018 called test',
'cargo new binary using 2018 named test',
'cargo new using 2018 test',
]
for input_ in invalid_inputs:
self.assertRaises(ParseError, p.parse, input_)