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.calcite.util;
  
  import org.apache.calcite.util.format.FormatElement;
  import org.apache.calcite.util.format.FormatModel;
  import org.apache.calcite.util.format.FormatModels;
  
  import org.hamcrest.Matcher;
  import org.junit.jupiter.api.Test;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import static org.apache.calcite.test.Matchers.isListOf;
  
  import static org.hamcrest.MatcherAssert.assertThat;
  
  /**
   * Unit test for {@link FormatModel}.
   */
  public class FormatModelTest {
  
    private void assertThatFormatElementParse(String formatString,
        Matcher<? super List<String>> matcher) {
      List<FormatElement> elements = FormatModels.BIG_QUERY.parse(formatString);
      List<String> stringResults = new ArrayList<>();
      for (FormatElement element : elements) {
        element.flatten(i -> stringResults.add(i.toString()));
      }
      assertThat(stringResults, matcher);
    }
  
    @Test void testSingleElement() {
      assertThatFormatElementParse("%j", isListOf("DDD"));
    }
  
    @Test void testMultipleElements() {
      assertThatFormatElementParse("%b-%d-%Y",
          isListOf("Mon", "-", "DD", "-", "pctY"));
    }
  
    @Test void testArbitraryText() {
      assertThatFormatElementParse("%jtext%b",
          isListOf("DDD", "text", "Mon"));
    }
  
    @Test void testAliasText() {
      assertThatFormatElementParse("%R",
          isListOf("HH24", ":", "MI"));
    }
  }
  