cql-pytest: add test for fromJson() parse error
cql-pytest: add test for fromJson() parse error

This patch adds a reproducer test for issue #7911, which is about a parse
error in JSON string passed to the fromJson() function causing an
internal error instead of the expected FunctionFailure error.

The issue is still open so the test xfails on Scylla (and passes on
Cassandra).

Refs #7911.

Signed-off-by: Nadav Har'El <625169824b719df98706d88646d0aae6f368ae4d@scylladb.com>
Message-Id: <20210112094629.3920472-1-625169824b719df98706d88646d0aae6f368ae4d@scylladb.com>

scylladb/scylla,scylladb/scylla,scylladb/scylla,scylladb/scylla