Add nullability matchers with Kotlin Contracts (#602) #646
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Bringing it from parallel branch
With Kotlin Contracts it's possible to establish that "If this function passes, X is true". This commit implements nullability type matchers for the
Any?
type, using Contracts to allow non-null inference to users.This commit didn't implement the same logic for matchers such as
x.shouldBeInstanceOf<Foo>()
, because currently it's impossible to implement this with Kotlin Contracts. https://youtrack.jetbrains.com/issue/KT-28298Fixes #601