Add test case for simulated io errors.

Update issue 126
Status: FixedInGit

tests/io_errors/SConscript

@@ -0,0 +1,15 @@
+# Simulate io errors when encoding and decoding
+
+Import("env")
+
+c = Copy("$TARGET", "$SOURCE")
+env.Command("alltypes.proto", "#alltypes/alltypes.proto", c)
+
+env.NanopbProto(["alltypes", "alltypes.options"])
+
+ioerr = env.Program(["io_errors.c", "alltypes.pb.c",
+                     "$COMMON/pb_encode.o", "$COMMON/pb_decode.o", "$COMMON/pb_common.o"])
+
+env.RunTest("io_errors.output", [ioerr, "$BUILD/alltypes/encode_alltypes.output"])
+
+