checker/tests/nullness/java8/methodref/Postconditions.java

// Test case for Issue #801
// https://github.com/typetools/checker-framework/issues/801
// @skip-test
// TODO: Enable postcondition override checks for method references

import org.checkerframework.checker.nullness.qual.*;

interface AssertFunc {
  @EnsuresNonNullIf(result = true, expression = "#1")
  boolean testParam(final @Nullable Object param);
}

interface AssertFunc2 {
  @EnsuresNonNullIf(result = true, expression = "#1")
  boolean testParam(final @Nullable Object param);
}

public class AssertionTest {
  @EnsuresNonNullIf(result = true, expression = "#1")
  static boolean override(final @Nullable Object param) {
    return param != null;
  }

  static boolean overrideAssertFunc2(final @Nullable Object param) {
    return param != null;
  }

  void context() {
    AssertFunc f = AssertionTest::override;
    // :: error: (methodref.receiver.postcondition)
    AssertFunc2 f2 = AssertionTest::overrideAssertFunc2;
  }
}