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.beam.sdk.extensions.sql;
  
  import org.apache.beam.sdk.schemas.Schema;
  import org.apache.beam.sdk.testing.PAssert;
  import org.apache.beam.sdk.testing.TestPipeline;
  import org.apache.beam.sdk.transforms.Create;
  import org.apache.beam.sdk.transforms.JsonToRow;
  import org.apache.beam.sdk.values.PCollection;
  import org.apache.beam.sdk.values.Row;
  import org.junit.Rule;
  import org.junit.Test;
  
  /** JsonToRowSqlTest. */
  public class JsonToRowSqlTest {
  
    @Rule public transient TestPipeline pipeline = TestPipeline.create();
  
    @Test
    public void testParsesRows() throws Exception {
      Schema personSchema =
          Schema.builder()
              .addStringField("name")
              .addInt32Field("height")
              .addBooleanField("knowsJavascript")
              .build();
  
      PCollection<String> jsonPersons =
          pipeline.apply(
              Create.of(
                  jsonPerson("person1", "80", "true"),
                  jsonPerson("person2", "70", "false"),
                  jsonPerson("person3", "60", "true"),
                  jsonPerson("person4", "50", "false"),
                  jsonPerson("person5", "40", "true")));
  
      Schema resultSchema = Schema.builder().addInt32Field("avg_height").build();
  
      PCollection<Row> sqlResult =
          jsonPersons
              .apply(JsonToRow.withSchema(personSchema))
              .apply(SqlTransform.query("SELECT AVG(height) as avg_height FROM PCOLLECTION"));
  
      PAssert.that(sqlResult).containsInAnyOrder(row(resultSchema, 60));
  
      pipeline.run();
    }
  
    private String jsonPerson(String name, String height, String knowsJs) {
      return "{\n"
          + "  \"name\": \""
          + name
          + "\",\n"
          + "  \"height\": "
          + height
          + ",\n"
          + "  \"knowsJavascript\": "
          + knowsJs
          + "\n"
          + "}";
    }
  
    private Row row(Schema schema, Object... values) {
      return Row.withSchema(schema).addValues(values).build();
    }
  }
  