checker/tests/nullness-reflection/NullnessReflectionResolutionTest.java

import java.lang.reflect.Method;
import org.checkerframework.checker.nullness.qual.NonNull;
import org.checkerframework.checker.nullness.qual.Nullable;
import org.checkerframework.common.reflection.qual.MethodVal;

/** Testing that reflection resolution uses more precise annotations for the Nullness Checker. */
public class NullnessReflectionResolutionTest {
  @NonNull Object returnNonNull() {
    return new Object();
  }

  void testReturnNonNull(
      @MethodVal(
              className = "NullnessReflectionResolutionTest",
              methodName = "returnNonNull",
              params = 0)
          Method m)
      throws Exception {
    @NonNull Object o = m.invoke(this);
  }

  void paramNullable(@Nullable Object param1, @Nullable Object param2) {}

  void testParamNullable(
      @MethodVal(
              className = "NullnessReflectionResolutionTest",
              methodName = "paramNullable",
              params = 2)
          Method m)
      throws Exception {
    @NonNull Object o = m.invoke(this, null, null);
  }

  static @NonNull Object paramAndReturnNonNullStatic(
      @Nullable Object param1, @Nullable Object param2) {
    return new Object();
  }

  void testParamAndReturnNonNullStatic(
      @MethodVal(
              className = "NullnessReflectionResolutionTest",
              methodName = "paramAndReturnNonNullStatic",
              params = 2)
          Method m)
      throws Exception {
    @NonNull Object o1 = m.invoke(this, null, null);
    @NonNull Object o2 = m.invoke(null, null, null);
  }
}