oboe: fix sample rate converter

Change pullData indexing.
Add pullReset() to reset framePositions.
Add simple test.
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index a254ecc..2b73f53 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -28,10 +28,10 @@
 		testOboe
         testUtilities.cpp
 		testFlowgraph.cpp
-#        testStreamClosedMethods.cpp
-#        testStreamStates.cpp
-#        testStreamWaitState.cpp
-#		testStreamOpen.cpp
-#        testXRunBehaviour.cpp
+        testStreamClosedMethods.cpp
+        testStreamStates.cpp
+        testStreamWaitState.cpp
+		testStreamOpen.cpp
+        testXRunBehaviour.cpp
         )
 target_link_libraries(testOboe gtest oboe)