checker/tests/nullness/IsEmptyPoll.java

// Test case for Issue 399:
// https://github.com/typetools/checker-framework/issues/399

// @skip-test until the issue is fixed

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

public final class IsEmptyPoll extends ArrayList<String> {

  void mNonNull(Queue<String> q) {
    while (!q.isEmpty()) {
      @NonNull String firstNode = q.poll();
    }
  }

  void mNullable(Queue<@Nullable String> q) {
    while (!q.isEmpty()) {
      // :: error: (assignment)
      @NonNull String firstNode = q.poll();
    }
  }

  void mNoCheck(Queue<@Nullable String> q) {
    // :: error: (assignment)
    @NonNull String firstNode = q.poll();
  }
}