[1/2] riched20/tests: Add helpers for simplifying tests of ITextRange and ITextSelection.

[Jactry Zeng]

Signed-off-by: Jactry Zeng <jzeng(a)codeweavers.com>
---
  dlls/riched20/tests/richole.c | 97 
++++++++++++++++++++++++++++---------------
  1 file changed, 64 insertions(+), 33 deletions(-)

[Huw Davies]

Signed-off-by: Huw Davies <huw(a)codeweavers.com>