Avoid crash when oneOf input variable is not defined #3080

Job	Run time
Security check of added dependencies	7s
Diff content of NPM package	45s
ci / Run fuzzing tests	24s
ci / Run integration tests	1m 13s
ci / Measure test coverage	27s
ci / Check for commonly ignored files	4s
ci / Run CodeQL security scan	1m 30s
ci / Run tests on Node v16	24s
ci / Run tests on Node v17	21s
ci / Lint source files	57s
ci / Check health of package-lock.json file	16s
ci / Run tests on Node v14	22s
ci / Run tests on Node v12	22s
ci / Build 'npmDist' artifact	26s
ci / Build 'denoDist' artifact	19s
	7m 57s

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