Alan 5e6b42c5e3 test: add tests for elide imports
This also adds the option to provide addition files when using `createTypescriptContext` this is paramount for the elide imports tests as without this certain symbols won't have the full details.

Which will cause tests to be false positive and re-surface issues like #13212
2018-12-20 11:38:01 -08:00
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2018-12-20 11:38:01 -08:00