239 lines
10 KiB
Python
239 lines
10 KiB
Python
import pytest
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from core.builtin_concepts import BuiltinConcepts
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from core.concept import Concept, DEFINITION_TYPE_BNF
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from core.sheerka.services.SheerkaExecute import ParserInput
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from core.tokenizer import Tokenizer, TokenKind, LexerError
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from parsers.BaseNodeParser import cnode
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from parsers.BaseParser import UnexpectedTokenParsingError, UnexpectedEofParsingError
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from parsers.BnfDefinitionParser import BnfDefinitionParser
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from parsers.BnfNodeParser import BnfNodeParser
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from parsers.BnfNodeParser import StrMatch, Optional, ZeroOrMore, OrderedChoice, Sequence, \
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OneOrMore, ConceptExpression
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from tests.TestUsingMemoryBasedSheerka import TestUsingMemoryBasedSheerka
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class ClassWithName:
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def __init__(self, name):
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self.name = name
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def c(name, rule_name=None):
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concept = Concept(name).init_key()
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return ConceptExpression(concept, rule_name=rule_name or name)
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def update_concepts_ids(sheerka, parsing_expression):
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if isinstance(parsing_expression, ConceptExpression):
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if not parsing_expression.concept.id:
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concept = sheerka.get_by_key(parsing_expression.concept.key)
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parsing_expression.concept.get_metadata().id = concept.id
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for pe in parsing_expression.elements:
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update_concepts_ids(sheerka, pe)
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eof_token = "<EOF>"
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class TestBnfParser(TestUsingMemoryBasedSheerka):
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def init_parser(self, *concepts):
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sheerka, context, *updated = self.init_concepts(*concepts, singleton=True)
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parser = BnfDefinitionParser()
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return sheerka, context, parser, *updated
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@pytest.mark.parametrize("expression, expected", [
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("'str'", StrMatch("str")),
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("1", StrMatch("1")),
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(" 1", StrMatch("1")),
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(",", StrMatch(",")),
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("'foo'?", Optional(StrMatch("foo"))),
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("'foo'*", ZeroOrMore(StrMatch("foo"))),
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("'foo'+", OneOrMore(StrMatch("foo"))),
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("1 | 2 | 3", OrderedChoice(StrMatch("1"), StrMatch("2"), StrMatch("3"))),
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("1|2|3", OrderedChoice(StrMatch("1"), StrMatch("2"), StrMatch("3"))),
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("1'|' 2 '|' 3", Sequence(StrMatch("1"), StrMatch("|"), StrMatch("2"), StrMatch("|"), StrMatch("3"))),
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("1 2 'foo'", Sequence(StrMatch("1"), StrMatch("2"), StrMatch("foo"))),
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("1 2 | 3 4+", OrderedChoice(
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Sequence(StrMatch("1"), StrMatch("2")),
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Sequence(StrMatch("3"), OneOrMore(StrMatch("4"))))),
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("1 (2 | 3) 4+", Sequence(
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StrMatch("1"),
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OrderedChoice(StrMatch("2"), StrMatch("3")),
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OneOrMore(StrMatch("4")))),
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("(1|2)+", OneOrMore(OrderedChoice(StrMatch("1"), StrMatch("2")))),
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("(1 2)+", OneOrMore(Sequence(StrMatch("1"), StrMatch("2")))),
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("1 *", Sequence(StrMatch("1"), StrMatch("*"))),
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("1 ?", Sequence(StrMatch("1"), StrMatch("?"))),
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("1 +", Sequence(StrMatch("1"), StrMatch("+"))),
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("(1|*) +", Sequence(OrderedChoice(StrMatch("1"), StrMatch("*")), StrMatch("+"))),
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("1, :&", Sequence(StrMatch("1"), StrMatch(","), StrMatch(":"), StrMatch("&"))),
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("(1 )", StrMatch("1")),
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("'str'=var", StrMatch("str", rule_name="var")),
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("'foo'?=var", Optional(StrMatch("foo"), rule_name="var")),
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("('foo'?)=var", Optional(StrMatch("foo"), rule_name="var")),
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("'foo'*=var", ZeroOrMore(StrMatch("foo"), rule_name="var")),
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("('foo'*)=var", ZeroOrMore(StrMatch("foo"), rule_name="var")),
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("'foo'+=var", OneOrMore(StrMatch("foo"), rule_name="var")),
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("('foo'+)=var", OneOrMore(StrMatch("foo"), rule_name="var")),
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("'foo'=var?", Optional(StrMatch("foo", rule_name="var"))),
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("('foo'=var)?", Optional(StrMatch("foo", rule_name="var"))),
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("'foo'=var*", ZeroOrMore(StrMatch("foo", rule_name="var"))),
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("('foo'=var)*", ZeroOrMore(StrMatch("foo", rule_name="var"))),
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("'foo'=var+", OneOrMore(StrMatch("foo", rule_name="var"))),
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("('foo'=var)+", OneOrMore(StrMatch("foo", rule_name="var"))),
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("(1 | 2 | 3)=var", OrderedChoice(StrMatch("1"), StrMatch("2"), StrMatch("3"), rule_name="var")),
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("(1 2)=var", Sequence(StrMatch("1"), StrMatch("2"), rule_name="var")),
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("(1 2)+=var", OneOrMore(Sequence(StrMatch("1"), StrMatch("2")), rule_name="var")),
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("(1 2)=var+", OneOrMore(Sequence(StrMatch("1"), StrMatch("2"), rule_name="var"))),
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("(1=a 2=b)=c", Sequence(StrMatch("1", rule_name="a"), StrMatch("2", rule_name="b"), rule_name="c")),
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("(1*=a)", ZeroOrMore(StrMatch("1"), rule_name="a")),
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("'a'* 'b'+", Sequence(ZeroOrMore(StrMatch("a")), OneOrMore(StrMatch("b")))),
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("('a'* 'b'+)", Sequence(ZeroOrMore(StrMatch("a")), OneOrMore(StrMatch("b")))),
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("('a'*=x 'b'+=y)=z", Sequence(
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ZeroOrMore(StrMatch("a"), rule_name="x"),
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OneOrMore(StrMatch("b"), rule_name="y"), rule_name="z")),
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("'--filter'",
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Sequence(StrMatch("-", skip_whitespace=False), StrMatch("-", skip_whitespace=False), StrMatch("filter")))
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])
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def test_i_can_parse_regex(self, expression, expected):
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sheerka, context, parser = self.init_parser()
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res = parser.parse(context, Tokenizer(expression))
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assert not parser.has_error
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assert res.status
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assert res.value.value == expected
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assert res.value.source == expression
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@pytest.mark.parametrize("expression, expected", [
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("foo", c("foo")),
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("foo*", ZeroOrMore(c("foo"))),
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("foo 'and' bar+", Sequence(c("foo"), StrMatch("and"), OneOrMore(c("bar")))),
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("foo | bar?", OrderedChoice(c("foo"), Optional(c("bar")))),
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("'str' = var", Sequence(StrMatch("str"), StrMatch("="), c("var"))),
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("'str''='var", Sequence(StrMatch("str"), StrMatch("="), c("var"))),
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("foo=f", c("foo", "f")),
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("foo=f 'constant'", Sequence(c("foo", "f"), StrMatch("constant"))),
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("def 'concept'", Sequence(c("def"), StrMatch("concept"))),
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])
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def test_i_can_parse_regex_with_concept(self, expression, expected):
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sheerka, context, parser, *concepts = self.init_parser("foo", "bar", "var", "def")
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update_concepts_ids(sheerka, expected)
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res = parser.parse(context, Tokenizer(expression))
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assert not parser.has_error
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assert res.status
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assert res.value.value == expected
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assert res.value.source == expression
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@pytest.mark.parametrize("expression, expected", [
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("foo", ConceptExpression("foo")),
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("foo=f", ConceptExpression("foo", rule_name="f")),
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])
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def test_i_can_parse_regex_with_concept_when_the_concept_is_still_under_definition(self, expression, expected):
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sheerka, context, parser = self.init_parser()
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context.obj = ClassWithName("foo")
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res = parser.parse(context, Tokenizer(expression))
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assert not parser.has_error
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assert res.status
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assert res.value.value == expected
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assert res.value.source == expression
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@pytest.mark.parametrize("expression, error", [
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("1 ", UnexpectedEofParsingError()),
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("1|", UnexpectedEofParsingError()),
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("(1|)", UnexpectedTokenParsingError("Unexpected token 'Token(<EOF>)'", eof_token, [TokenKind.RPAR])),
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("1=", UnexpectedTokenParsingError("Unexpected token 'Token(<EOF>)'", eof_token, [TokenKind.IDENTIFIER])),
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])
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def test_i_can_detect_errors(self, expression, error):
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sheerka, context, parser = self.init_parser()
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res = parser.parse(context, Tokenizer(expression))
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ret_value = res.body.body
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assert parser.has_error
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assert sheerka.isinstance(res.body, BuiltinConcepts.ERROR)
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assert not res.status
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assert ret_value[0] == error
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def test_i_can_detect_lexer_error(self):
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sheerka, context, parser = self.init_parser()
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res = parser.parse(context, Tokenizer("'name"))
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assert not res.status
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assert sheerka.isinstance(res.body, BuiltinConcepts.ERROR)
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assert isinstance(res.body.body[0], LexerError)
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assert res.body.body[0].message == "Missing Trailing quote"
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assert res.body.body[0].text == "'name"
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def test_i_can_use_the_result_of_regex_parsing_to_parse_a_text(self):
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sheerka, context, regex_parser, foo, bar = self.init_parser("foo", "bar")
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for concept in [foo, bar]:
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concept.get_metadata().definition_type = DEFINITION_TYPE_BNF
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foo.set_bnf(regex_parser.parse(context, "'twenty' | 'thirty'").value.value)
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bar.set_bnf(regex_parser.parse(context, "foo ('one' | 'two')").value.value)
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bnf_parser = BnfNodeParser()
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bnf_parser.init_from_concepts(context, [foo, bar])
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res = bnf_parser.parse(context, ParserInput("twenty two"))
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assert res.status
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assert res.value.body == [cnode("bar", 0, 2, "twenty two")]
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res = bnf_parser.parse(context, ParserInput("thirty one"))
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assert res.status
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assert res.value.body == [cnode("bar", 0, 2, "thirty one")]
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res = bnf_parser.parse(context, ParserInput("twenty"))
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assert res.status
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assert res.value.body == [cnode("foo", 0, 0, "twenty")]
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def test_i_cannot_parse_when_too_many_concepts(self):
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sheerka, context, regex_parser, foo1, foo2 = self.init_parser(
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Concept(name="foo", body="1"),
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Concept(name="foo", body="2"))
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res = regex_parser.parse(context, "foo")
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assert not res.status
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assert context.sheerka.isinstance(res.value, BuiltinConcepts.CANNOT_RESOLVE_CONCEPT)
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assert res.value.body == ('key', 'foo')
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def test_i_cannot_parse_when_unknown_concept(self):
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sheerka, context, regex_parser = self.init_parser()
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res = regex_parser.parse(self.get_context(), "foo")
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assert not res.status
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assert context.sheerka.isinstance(res.value, BuiltinConcepts.UNKNOWN_CONCEPT)
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assert res.value.body == ('key', 'foo')
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def test_concept_expression_are_correctly_created_when_isa_concept_is_detected(self):
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sheerka, context, parser, one, two, number, twenties = self.init_parser(
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"one",
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"two",
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"number",
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"twenties")
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sheerka.set_isa(context, sheerka.new("one"), number)
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sheerka.set_isa(context, sheerka.new("two"), number)
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sheerka.set_isa(context, sheerka.new("twenties"), number)
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sub_context = context.push(BuiltinConcepts.INIT_BNF, twenties)
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expression = "'twenty' number=n1"
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res = parser.parse(sub_context, Tokenizer(expression))
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assert not parser.has_error
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assert res.status
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pexpression = res.value.value
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assert pexpression == Sequence(StrMatch('twenty'), ConceptExpression(number, "n1"))
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