handler: Implement read/write/close/delete

Implement read/write/close/delete as pass-through functions.

Signed-off-by: Kun Yi <kunyi@google.com>
Change-Id: I56b935b03b8048a70a168d00061c043795b90f5e
diff --git a/test/Makefile.am b/test/Makefile.am
index 5b3fe6c..5ce51f2 100644
--- a/test/Makefile.am
+++ b/test/Makefile.am
@@ -11,6 +11,7 @@
 # Run all 'check' test programs
 check_PROGRAMS = \
 	handler_open_unittest \
+	handler_readwrite_unittest \
 	handler_unittest
 TESTS = $(check_PROGRAMS)
 
@@ -23,3 +24,8 @@
 handler_open_unittest_LDADD = $(PHOSPHOR_LOGGING_LIBS) \
 	$(top_builddir)/handler.o
 handler_open_unittest_CXXFLAGS = $(PHOSPHOR_LOGGING_CFLAGS)
+
+handler_readwrite_unittest_SOURCES = handler_readwrite_unittest.cpp
+handler_readwrite_unittest_LDADD = $(PHOSPHOR_LOGGING_LIBS) \
+	$(top_builddir)/handler.o
+handler_readwrite_unittest_CXXFLAGS = $(PHOSPHOR_LOGGING_CFLAGS)