test_location.py
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import os
from clang.cindex import Config
if 'CLANG_LIBRARY_PATH' in os.environ:
Config.set_library_path(os.environ['CLANG_LIBRARY_PATH'])
from clang.cindex import Cursor
from clang.cindex import File
from clang.cindex import SourceLocation
from clang.cindex import SourceRange
from .util import get_cursor
from .util import get_tu
import unittest
baseInput="int one;\nint two;\n"
class TestLocation(unittest.TestCase):
def assert_location(self, loc, line, column, offset):
self.assertEqual(loc.line, line)
self.assertEqual(loc.column, column)
self.assertEqual(loc.offset, offset)
def test_location(self):
tu = get_tu(baseInput)
one = get_cursor(tu, 'one')
two = get_cursor(tu, 'two')
self.assertIsNotNone(one)
self.assertIsNotNone(two)
self.assert_location(one.location,line=1,column=5,offset=4)
self.assert_location(two.location,line=2,column=5,offset=13)
# adding a linebreak at top should keep columns same
tu = get_tu('\n' + baseInput)
one = get_cursor(tu, 'one')
two = get_cursor(tu, 'two')
self.assertIsNotNone(one)
self.assertIsNotNone(two)
self.assert_location(one.location,line=2,column=5,offset=5)
self.assert_location(two.location,line=3,column=5,offset=14)
# adding a space should affect column on first line only
tu = get_tu(' ' + baseInput)
one = get_cursor(tu, 'one')
two = get_cursor(tu, 'two')
self.assert_location(one.location,line=1,column=6,offset=5)
self.assert_location(two.location,line=2,column=5,offset=14)
# define the expected location ourselves and see if it matches
# the returned location
tu = get_tu(baseInput)
file = File.from_name(tu, 't.c')
location = SourceLocation.from_position(tu, file, 1, 5)
cursor = Cursor.from_location(tu, location)
one = get_cursor(tu, 'one')
self.assertIsNotNone(one)
self.assertEqual(one, cursor)
# Ensure locations referring to the same entity are equivalent.
location2 = SourceLocation.from_position(tu, file, 1, 5)
self.assertEqual(location, location2)
location3 = SourceLocation.from_position(tu, file, 1, 4)
self.assertNotEqual(location2, location3)
offset_location = SourceLocation.from_offset(tu, file, 5)
cursor = Cursor.from_location(tu, offset_location)
verified = False
for n in [n for n in tu.cursor.get_children() if n.spelling == 'one']:
self.assertEqual(n, cursor)
verified = True
self.assertTrue(verified)
def test_extent(self):
tu = get_tu(baseInput)
one = get_cursor(tu, 'one')
two = get_cursor(tu, 'two')
self.assert_location(one.extent.start,line=1,column=1,offset=0)
self.assert_location(one.extent.end,line=1,column=8,offset=7)
self.assertEqual(baseInput[one.extent.start.offset:one.extent.end.offset], "int one")
self.assert_location(two.extent.start,line=2,column=1,offset=9)
self.assert_location(two.extent.end,line=2,column=8,offset=16)
self.assertEqual(baseInput[two.extent.start.offset:two.extent.end.offset], "int two")
file = File.from_name(tu, 't.c')
location1 = SourceLocation.from_position(tu, file, 1, 1)
location2 = SourceLocation.from_position(tu, file, 1, 8)
range1 = SourceRange.from_locations(location1, location2)
range2 = SourceRange.from_locations(location1, location2)
self.assertEqual(range1, range2)
location3 = SourceLocation.from_position(tu, file, 1, 6)
range3 = SourceRange.from_locations(location1, location3)
self.assertNotEqual(range1, range3)