This tests selecting LTR/RTL text that spans multiple lines in RTL/LTR block (opposite directionality). To manually test, select text in each of editable regions below by dragging mouse from one edge to another. The entire line should be selected.

TEST 1 line 1:PASS
TEST 1 line 2:PASS
TEST 2 line 1:PASS
TEST 3 line 1:PASS
TEST 4 line 1:PASS
TEST 4 line 2:PASS
TEST 4 line 3:PASS
TEST 5 line 1:PASS
TEST 5 line 2:PASS
TEST 5 line 3:PASS
TEST 6 line 1:PASS
TEST 6 line 2:PASS
TEST 6 line 3:PASS
TEST 7 line 1:PASS
TEST 7 line 2:PASS
TEST 7 line 3:PASS
TEST 8 line 1:PASS
TEST 8 line 2:PASS
TEST 8 line 3:PASS
TEST 9 line 1:PASS
TEST 9 line 2:PASS
TEST 9 line 3:PASS
TEST 10 line 1:PASS
TEST 10 line 2:PASS
TEST 10 line 3:PASS