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import pytest
from lunr.query import Query, QueryPresence
from lunr.query_parser import QueryParser
from lunr.exceptions import QueryParseError
def parse(q):
query = Query(["title", "body"])
parser = QueryParser(q, query)
parser.parse()
return query.clauses
class TestQueryParser:
def test_parse_empty_string(self):
clauses = parse("")
assert len(clauses) == 0
def test_parse_single_term(self):
clauses = parse("foo")
assert len(clauses) == 1
clause = clauses[0]
assert clause.term == "foo"
assert clause.fields == ["title", "body"]
assert clause.use_pipeline is True
assert clause.presence is QueryPresence.OPTIONAL
def test_parse_single_term_uppercase(self):
clauses = parse("FOO")
assert len(clauses) == 1
clause = clauses[0]
assert clause.term == "foo"
assert clause.fields == ["title", "body"]
assert clause.use_pipeline is True
def test_parse_single_term_with_wildcard(self):
clauses = parse("fo*")
assert len(clauses) == 1
clause = clauses[0]
assert clause.term == "fo*"
assert clause.use_pipeline is False
def test_multiple_terms(self):
clauses = parse("foo bar")
assert len(clauses) == 2
assert clauses[0].term == "foo"
assert clauses[1].term == "bar"
def test_term_with_presence_required_adds_required_clause(self):
clauses = parse("+foo")
assert len(clauses) == 1
assert clauses[0].term == "foo"
assert clauses[0].boost == 1
assert clauses[0].fields == ["title", "body"]
assert clauses[0].presence == QueryPresence.REQUIRED
def test_term_with_presence_required_adds_prohibited_clause(self):
clauses = parse("-foo")
assert len(clauses) == 1
assert clauses[0].term == "foo"
assert clauses[0].boost == 1
assert clauses[0].fields == ["title", "body"]
assert clauses[0].presence == QueryPresence.PROHIBITED
def test_term_scoped_by_field_with_presence_required(self):
clauses = parse("+title:foo")
assert len(clauses) == 1
assert clauses[0].term == "foo"
assert clauses[0].boost == 1
assert clauses[0].fields == ["title"]
assert clauses[0].presence == QueryPresence.REQUIRED
def test_term_scoped_by_field_with_presence_prohibited(self):
clauses = parse("-title:foo")
assert len(clauses) == 1
assert clauses[0].term == "foo"
assert clauses[0].boost == 1
assert clauses[0].fields == ["title"]
assert clauses[0].presence == QueryPresence.PROHIBITED
def test_multiple_terms_with_presence_creates_two_clauses(self):
clauses = parse("+foo +bar")
assert len(clauses) == 2
assert clauses[0].term == "foo"
assert clauses[1].term == "bar"
assert clauses[0].presence == QueryPresence.REQUIRED
assert clauses[1].presence == QueryPresence.REQUIRED
def test_unknown_field(self):
with pytest.raises(QueryParseError):
parse("unknown:foo")
def test_field_without_a_term(self):
with pytest.raises(QueryParseError):
parse("title:")
def test_field_twice(self):
with pytest.raises(QueryParseError):
parse("title:title:")
def test_term_with_field(self):
clauses = parse("title:foo")
assert len(clauses) == 1
assert clauses[0].fields == ["title"]
def test_uppercase_field_with_uppercase_term(self):
query = Query(["TITLE"])
parser = QueryParser("TITLE:FOO", query)
parser.parse()
clauses = query.clauses
assert len(clauses) == 1
assert clauses[0].term == "foo"
assert clauses[0].fields == ["TITLE"]
def test_multiple_terms_scoped_to_different_fields(self):
clauses = parse("title:foo body:bar")
assert len(clauses) == 2
assert clauses[0].fields == ["title"]
assert clauses[1].fields == ["body"]
assert clauses[0].term == "foo"
assert clauses[1].term == "bar"
def test_single_term_with_edit_distance(self):
clauses = parse("foo~2")
assert len(clauses) == 1
assert clauses[0].term == "foo"
assert clauses[0].fields == ["title", "body"]
assert clauses[0].edit_distance == 2
def test_multiple_terms_with_edit_distance(self):
clauses = parse("foo~2 bar~3")
assert len(clauses) == 2
assert clauses[0].fields == ["title", "body"]
assert clauses[1].fields == ["title", "body"]
assert clauses[0].term == "foo"
assert clauses[1].term == "bar"
assert clauses[0].edit_distance == 2
assert clauses[1].edit_distance == 3
def test_single_term_scoped_to_field_with_edit_distance(self):
clauses = parse("title:foo~2")
assert len(clauses) == 1
assert clauses[0].term == "foo"
assert clauses[0].fields == ["title"]
assert clauses[0].edit_distance == 2
def test_non_numeric_edit_distance(self):
with pytest.raises(QueryParseError):
parse("foo~a")
def test_edit_distance_without_a_term(self):
with pytest.raises(QueryParseError):
parse("~2")
def test_single_term_with_boost(self):
clauses = parse("foo^2")
assert len(clauses) == 1
assert clauses[0].term == "foo"
assert clauses[0].fields == ["title", "body"]
assert clauses[0].boost == 2
def test_non_numeric_boost(self):
with pytest.raises(QueryParseError):
parse("foo^a")
def test_boost_without_a_term(self):
with pytest.raises(QueryParseError):
parse("^2")
def test_multiple_terms_with_boost(self):
clauses = parse("foo^2 bar^3")
assert len(clauses) == 2
assert clauses[0].fields == ["title", "body"]
assert clauses[1].fields == ["title", "body"]
assert clauses[0].term == "foo"
assert clauses[1].term == "bar"
assert clauses[0].boost == 2
assert clauses[1].boost == 3
def test_term_scoped_by_field_with_boost(self):
clauses = parse("title:foo^2")
assert len(clauses) == 1
assert clauses[0].term == "foo"
assert clauses[0].fields == ["title"]
assert clauses[0].boost == 2
def test_term_with_boost_and_edit_distance(self):
clauses = parse("foo^2~3")
assert len(clauses) == 1
assert clauses[0].term == "foo"
assert clauses[0].fields == ["title", "body"]
assert clauses[0].edit_distance == 3
assert clauses[0].boost == 2
def test_edit_distance_followed_by_presence(self):
clauses = parse("foo~10 +bar")
assert len(clauses) == 2
assert clauses[0].fields == ["title", "body"]
assert clauses[1].fields == ["title", "body"]
assert clauses[0].term == "foo"
assert clauses[1].term == "bar"
assert clauses[0].edit_distance == 10
assert clauses[1].edit_distance == 0
assert clauses[0].presence == QueryPresence.OPTIONAL
assert clauses[1].presence == QueryPresence.REQUIRED
def test_boost_followed_by_presence(self):
clauses = parse("foo^10 +bar")
assert len(clauses) == 2
assert clauses[0].fields == ["title", "body"]
assert clauses[1].fields == ["title", "body"]
assert clauses[0].term == "foo"
assert clauses[1].term == "bar"
assert clauses[0].boost == 10
assert clauses[1].boost == 1
assert clauses[0].presence == QueryPresence.OPTIONAL
assert clauses[1].presence == QueryPresence.REQUIRED
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