Functional tests for WO cache mode

Signed-off-by: Adam Rutkowski <adam.j.rutkowski@intel.com>

tests/functional/pyocf/types/data.py

@@ -96,10 +96,12 @@ class Data:
         return cls(pages * Data.PAGE_SIZE)
 
     @classmethod
-    def from_bytes(cls, source: bytes):
-        d = cls(len(source))
+    def from_bytes(cls, source: bytes, offset: int = 0, size: int = 0):
+        if size == 0:
+            size = len(source) - offset
+        d = cls(size)
 
-        memmove(d.handle, cast(source, c_void_p), len(source))
+        memmove(d.handle, cast(source, c_void_p).value + offset, size)
 
         return d
 

tests/functional/pyocf/types/io.py

@@ -108,9 +108,9 @@ class Io(Structure):
             byref(self), addr, length, direction, io_class, flags
         )
 
-    def set_data(self, data: Data):
+    def set_data(self, data: Data, offset: int = 0):
         self.data = data
-        OcfLib.getInstance().ocf_io_set_data_wrapper(byref(self), data, 0)
+        OcfLib.getInstance().ocf_io_set_data_wrapper(byref(self), data, offset)
 
     def set_queue(self, queue: Queue):
         OcfLib.getInstance().ocf_io_set_queue_wrapper(byref(self), queue.handle)