DRIVERS-1859 BSON corpus code and symbol tests are partially testing the wrong types

[japhb]

In https://github.com/mongodb/specifications/blob/master/source/bson-corpus/tests/code.json starting with the fourth test (line 21 and following), the tests switch from correctly testing BSON type 0x0D (JavaScript code) to incorrectly testing BSON type 0x02 (regular strings).

Unfortunately, the comparison canonical_extjson seems to have been generated from the BSON, meaning that the tests succeed for the wrong reason -- they are regular string tests, not code tests.

Likewise, all of the decodeErrors tests are for regular strings, not code, despite the descriptions.

[japhb]

Turns out there's another test doing this, https://github.com/mongodb/specifications/blob/master/source/bson-corpus/tests/symbol.json -- all the decodeErrors tests are for regular strings (BSON type 0x02), not symbols (BSON type 0x0E), despite the descriptions.

[ShaneHarvey]

Thanks for reporting this @japhb, I've opened DRIVERS-1859 to help us track and fix this issue.