pp: implement verbose serialization of box errors#463
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When a test fails with an error, the error is serialized with the `tostring` Lua function, which by default prints only the error message. This means that some useful information, such as the error trace and payload fields, are lost. We could enable verbose error serialization using the `box_error_serialize_verbose` compat module option, but it may break existing tests. Let's instead unpack errors thrown by tests before printing them to make debugging easier. Closes tarantool#445
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When a test fails with an error, the error is serialized with the
tostringLua function, which by default prints only the error message. This means that some useful information, such as the error trace and payload fields, are lost. We could enable verbose error serialization using thebox_error_serialize_verbosecompat module option, but it may break existing tests. Let's instead unpack errors thrown by tests before printing them to make debugging easier.Closes #445