AVRO-3229: Raise Exception on Invalid Enum Default

[kojiromike]

Raise an InvalidDefault exception when attempting to parse an enumschema with a default value that isn't one of the enum's symbols.

Jira

• Addresses AVRO-3229
• References it in the PR title.
• Adds no dependency

Tests

• Adds a unit test to ensure the schema is invalid as expected.

Commits

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• Commits follow the guidelines from "How to write a good git commit message":
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  5. Body wraps at 72 characters
  6. Body explains "what" and "why", not "how"

Documentation

• N/A

[RyanSkraba]

LGTM, thanks!

This is consistent with the Java SDK behaviour. Unlike field defaults, there's no way to turn off enum default validation in Java either, but I don't see this being a problem.

avro/lang/java/avro/src/main/java/org/apache/avro/Schema.java

Line 1044 in da39228

"The Enum Default: " + enumDefault + " is not in the enum symbol set: " + symbols);