buffet: Add support for 'default' properties in CDD
The internals of supporting optional command parameters/state
properties was built into buffet earlier, but this was not exposed
in JSON reading/writing routines, so it was impossible to use this
feature.
Added JSON serialization/deserialization code and unit tests
to verify the operation.
BUG=brillo:357
TEST=`FEATURES=test emerge-link buffet`
Change-Id: I29c8d3d7c0894a9c837e73d0fdb16bafdfadfeca
Reviewed-on: https://chromium-review.googlesource.com/253070
Trybot-Ready: Alex Vakulenko <avakulenko@chromium.org>
Tested-by: Alex Vakulenko <avakulenko@chromium.org>
Reviewed-by: Christopher Wiley <wiley@chromium.org>
Commit-Queue: Alex Vakulenko <avakulenko@chromium.org>
diff --git a/buffet/commands/schema_constants.cc b/buffet/commands/schema_constants.cc
index a26c355..22a4766 100644
--- a/buffet/commands/schema_constants.cc
+++ b/buffet/commands/schema_constants.cc
@@ -30,6 +30,7 @@
namespace attributes {
const char kType[] = "type";
const char kDisplayName[] = "displayName";
+const char kDefault[] = "default";
const char kNumeric_Min[] = "minimum";
const char kNumeric_Max[] = "maximum";
