func verifyPositions(t *testing.T, fset *token.FileSet, f *token.File, lines []int) {
for offs := 0; offs < f.Size(); offs++ {
p := f.Pos(offs)
offs2 := f.Offset(p)
if offs2 != offs {
t.Errorf("%s, Offset: expected offset %d; got %d", f.Name(), offs, offs2)
}
line, col := linecol(lines, offs)
msg := fmt.Sprintf("%s (offs = %d, p = %d)", f.Name(), offs, p)
checkPos(t, msg, f.Position(f.Pos(offs)), token.Position{f.Name(), offs, line, col})
checkPos(t, msg, fset.Position(p), token.Position{f.Name(), offs, line, col})
}
}
