External module "test-error"

testError

• testError<T>(type: Type<T>, value: T): Error | undefined

• Calls the .testError method of type or falls back to an implementation derived from .test.

  Type parameters

  • T

  Parameters

  • type: Type<T>

    The type used for the test.

  • value: T

    The value to match.

  Returns Error | undefined

  Undefined if the value matches, otherwise an Error instance.