Stronger asserts in Kotlin optimize enum instr test.
Stronger asserts in Kotlin optimize enum instr test.

Summary:
Right now we only assert size and don't check values, because the switchmap was found to be unstable.

This at least asserts the properties we expect hold: that each switchmap case is positive and unique. Having this is important for a Kotlin-specific optimization later in the diff stack.

Reviewed By: thezhangwei

Differential Revision: D40419003

fbshipit-source-id: 047a68982efe2b896a9504b08f750a41d7b06529

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