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   * 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.
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  package org.apache.beam.sdk.extensions.sql.meta.provider.mongodb;
  
  import static org.apache.beam.sdk.extensions.sql.meta.provider.test.TestTableProvider.PUSH_DOWN_OPTION;
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.hamcrest.Matchers.instanceOf;
  
  import java.util.Arrays;
  import java.util.Collection;
  import org.apache.beam.sdk.extensions.sql.TableUtils;
  import org.apache.beam.sdk.extensions.sql.impl.BeamSqlEnv;
  import org.apache.beam.sdk.extensions.sql.impl.rel.BeamCalcRel;
  import org.apache.beam.sdk.extensions.sql.impl.rel.BeamRelNode;
  import org.apache.beam.sdk.extensions.sql.meta.Table;
  import org.apache.beam.sdk.extensions.sql.meta.provider.mongodb.MongoDbTable.MongoDbFilter;
  import org.apache.beam.sdk.extensions.sql.meta.provider.test.TestTableProvider;
  import org.apache.beam.sdk.extensions.sql.meta.provider.test.TestTableProvider.PushDownOptions;
  import org.apache.beam.sdk.options.PipelineOptionsFactory;
  import org.apache.beam.sdk.schemas.Schema;
  import org.apache.beam.sdk.testing.TestPipeline;
  import org.apache.beam.sdk.values.Row;
  import org.junit.Before;
  import org.junit.Rule;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.junit.runners.Parameterized;
  import org.junit.runners.Parameterized.Parameter;
  import org.junit.runners.Parameterized.Parameters;
  
  @RunWith(Parameterized.class)
  public class MongoDbFilterTest {
    private static final Schema BASIC_SCHEMA =
        Schema.builder()
            .addInt32Field("unused1")
            .addInt32Field("id")
            .addStringField("name")
            .addInt16Field("unused2")
            .addBooleanField("b")
            .build();
    private BeamSqlEnv sqlEnv;
  
    @Parameters
    public static Collection<Object[]> data() {
      return Arrays.asList(
          new Object[][] {
            {"select * from TEST where unused1=100", true},
            {"select * from TEST where unused1 in (100, 200)", true},
            {"select * from TEST where b", true},
            {"select * from TEST where not b", true},
            {
              "select * from TEST where unused1>100 and unused1<=200 and id<>1 and (name='two' or id=2)",
              true
            },
            {"select * from TEST where name like 'o%e'", false},
            {"select * from TEST where unused1+10=110", false},
            {"select * from TEST where unused1=unused2 and id=2", false},
            {"select * from TEST where unused1+unused2=10", false}
          });
    }
  
    @Parameter public String query;
  
    @Parameter(1)
    public boolean isSupported;
  
    @Rule public TestPipeline pipeline = TestPipeline.create();
  
    @Before
    public void buildUp() {
      TestTableProvider tableProvider = new TestTableProvider();
      Table table = getTable("TEST", PushDownOptions.NONE);
      tableProvider.createTable(table);
      tableProvider.addRows(
          table.getName(),
          row(BASIC_SCHEMA, 100, 1, "one", (short) 100, true),
          row(BASIC_SCHEMA, 200, 2, "two", (short) 200, false));
  
      sqlEnv =
          BeamSqlEnv.builder(tableProvider)
              .setPipelineOptions(PipelineOptionsFactory.create())
              .build();
    }
  
    @Test
    public void testIsSupported() {
      BeamRelNode beamRelNode = sqlEnv.parseQuery(query);
      assertThat(beamRelNode, instanceOf(BeamCalcRel.class));
      MongoDbFilter filter =
          MongoDbFilter.create(((BeamCalcRel) beamRelNode).getProgram().split().right);
  
      assertThat(
          "Query: '" + query + "' is expected to be " + (isSupported ? "supported." : "unsupported."),
          filter.getNotSupported().isEmpty() == isSupported);
    }
  
    private static Table getTable(String name, PushDownOptions options) {
      return Table.builder()
          .name(name)
          .comment(name + " table")
          .schema(BASIC_SCHEMA)
          .properties(
              TableUtils.parseProperties(
                  "{ " + PUSH_DOWN_OPTION + ": " + "\"" + options.toString() + "\" }"))
          .type("test")
          .build();
    }
  
    private static Row row(Schema schema, Object... objects) {
      return Row.withSchema(schema).addValues(objects).build();
    }
  }
  