Issue366.java

// Test case for Issue 366:
// https://github.com/typetools/checker-framework/issues/366
// @below-java8-jdk-skip-test

import java.util.Optional;
import org.checkerframework.checker.nullness.qual.NonNull;
import org.checkerframework.checker.nullness.qual.Nullable;

class Test {
    static Optional<@NonNull String> getPossiblyEmptyString() {
        return Optional.ofNullable(null);
    }

    static Optional<@Nullable String> getPossiblyEmptyString2() {
        // The optional returned is still @NonNull.
        //:: error: (return.type.incompatible)
        return Optional.ofNullable(null);
    }
}