def test_multiple_changes_at_once():
pytest.skip("deprecated")
grammar = """
S ::= C S
| C
C ::= "a" | "b"
"""
lrp = IncParser(grammar, LR1)
lrp.check("a a a")
lrp.previous_version = lrp.get_ast()
ast = lrp.previous_version
#root
# bos
# S
# C a
# S
# C a
# ...
C = ast.parent.children[1].children[1].children[0]
assert C.symbol == Nonterminal("C")
assert C.children[0].symbol == Terminal("a")
# put insertion into this Node
changed_node = C.children[0]
changed_node.symbol.name = "b b a"
apply_change(lrp, changed_node)
lrp.previous_version.pprint()
lrp.inc_parse()
lrp.stack[1].pprint()
assert False
def test_multiple_changes_3():
pytest.skip("deprecated")
lrp = IncParser(grammar, LR1)
lrp.check("1 + 2")
lrp.previous_version = lrp.get_ast()
ast = lrp.previous_version
Viewer().show_tree(lrp.previous_version.parent.children[1])
i2 = ast.parent.children[1].children[1]
assert i2.symbol == Terminal("+")
i2.symbol.name = "*"
apply_change(lrp, i2)
lrp.inc_parse()
lrp.stack[1].pprint()
Viewer().show_tree(lrp.stack[1])
assert False
def test_deletion():
pytest.skip("deprecated")
grammar = """
S ::= C S
| C
C ::= "a" | "b"
"""
lrp = IncParser(grammar, LR1)
lrp.check("a a a")
lrp.previous_version = lrp.get_ast()
ast = lrp.previous_version
Viewer().show_tree(lrp.previous_version.parent)
C = ast.parent.children[1].children[1].children[0]
assert C.symbol == Nonterminal("C")
assert C.children[0].symbol == Terminal("a")
# delete terminal node
C.children.pop(0)
apply_change(lrp, C)
lrp.inc_parse()
Viewer().show_tree(lrp.stack[1])
assert False
