content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements. See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License. You may obtain a copy of the License at
   *
   *    http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.kafka.streams.query;
  
  import org.apache.kafka.streams.query.internals.SucceededQueryResult;
  
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.hamcrest.Matchers.is;
  import static org.hamcrest.Matchers.nullValue;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  
  
  class StateQueryResultTest {
  
      StateQueryResult<String> stringStateQueryResult;
      final QueryResult<String> noResultsFound = new SucceededQueryResult<>(null);
      final QueryResult<String> validResult = new SucceededQueryResult<>("Foo");
  
      @BeforeEach
      public void setUp() {
          stringStateQueryResult = new StateQueryResult<>();
      }
  
      @Test
      void getOnlyPartitionResultNoResultsTest() {
          stringStateQueryResult.addResult(0, noResultsFound);
          final QueryResult<String> result = stringStateQueryResult.getOnlyPartitionResult();
          assertThat("Zero query results shouldn't error", result, nullValue());
      }
  
      @Test
      void getOnlyPartitionResultWithSingleResultTest() {
          stringStateQueryResult.addResult(0, validResult);
          final QueryResult<String> result = stringStateQueryResult.getOnlyPartitionResult();
          assertThat("Valid query results still works", result.getResult(), is("Foo"));
      }
  
      @Test
      void getOnlyPartitionResultMultipleResults() {
          stringStateQueryResult.addResult(0, validResult);
          stringStateQueryResult.addResult(1, validResult);
          assertThrows(IllegalArgumentException.class, () -> stringStateQueryResult.getOnlyPartitionResult(),
              "More than one query result throws IllegalArgumentException");
      }
  }