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.adapter.kafka;
  
  import org.apache.calcite.config.CalciteConnectionProperty;
  import org.apache.calcite.test.CalciteAssert;
  
  import com.google.common.io.Resources;
  
  import org.junit.jupiter.api.Test;
  
  import java.io.IOException;
  import java.io.UncheckedIOException;
  import java.net.URL;
  import java.nio.charset.StandardCharsets;
  
  import static java.util.Objects.requireNonNull;
  
  /**
   * Unit test cases for Kafka adapter.
   */
  class KafkaAdapterTest {
    protected static final URL MODEL =
        requireNonNull(KafkaAdapterTest.class.getResource("/kafka.model.json"));
  
    private CalciteAssert.AssertThat assertModel(String model) {
      // ensure that Schema from this instance is being used
      model = model.replace(KafkaAdapterTest.class.getName(), KafkaAdapterTest.class.getName());
  
      return CalciteAssert.that()
          .withModel(model);
    }
  
    private CalciteAssert.AssertThat assertModel(URL url) {
      requireNonNull(url, "url");
      try {
        return assertModel(Resources.toString(url, StandardCharsets.UTF_8));
      } catch (IOException e) {
        throw new UncheckedIOException(e);
      }
    }
  
    @Test void testSelect() {
      assertModel(MODEL)
          .query("SELECT STREAM * FROM KAFKA.MOCKTABLE")
          .limit(2)
  
          .typeIs("[MSG_PARTITION INTEGER NOT NULL"
              + ", MSG_TIMESTAMP BIGINT NOT NULL"
              + ", MSG_OFFSET BIGINT NOT NULL"
              + ", MSG_KEY_BYTES VARBINARY"
              + ", MSG_VALUE_BYTES VARBINARY NOT NULL]")
  
          .returnsUnordered(
              "MSG_PARTITION=0; MSG_TIMESTAMP=-1; MSG_OFFSET=0; MSG_KEY_BYTES=mykey0; MSG_VALUE_BYTES=myvalue0",
              "MSG_PARTITION=0; MSG_TIMESTAMP=-1; MSG_OFFSET=1"
                  + "; MSG_KEY_BYTES=mykey1; MSG_VALUE_BYTES=myvalue1")
  
          .explainContains("PLAN=EnumerableInterpreter\n"
              + "  BindableTableScan(table=[[KAFKA, MOCKTABLE, (STREAM)]])\n");
    }
  
    @Test void testFilterWithProject() {
      assertModel(MODEL)
          .with(CalciteConnectionProperty.TOPDOWN_OPT.camelName(), false)
          .query("SELECT STREAM MSG_PARTITION,MSG_OFFSET,MSG_VALUE_BYTES FROM KAFKA.MOCKTABLE"
              + " WHERE MSG_OFFSET>0")
          .limit(1)
  
          .returnsUnordered(
              "MSG_PARTITION=0; MSG_OFFSET=1; MSG_VALUE_BYTES=myvalue1")
          .explainContains(
              "PLAN=EnumerableCalc(expr#0..4=[{inputs}], expr#5=[0:BIGINT], expr#6=[>($t2, $t5)], MSG_PARTITION=[$t0], MSG_OFFSET=[$t2], MSG_VALUE_BYTES=[$t4], $condition=[$t6])\n"
                  + "  EnumerableInterpreter\n"
                  + "    BindableTableScan(table=[[KAFKA, MOCKTABLE, (STREAM)]])");
    }
  
    @Test void testCustRowConverter() {
      assertModel(MODEL)
          .query("SELECT STREAM * FROM KAFKA.MOCKTABLE_CUST_ROW_CONVERTER")
          .limit(2)
  
          .typeIs("[TOPIC_NAME VARCHAR NOT NULL"
              + ", PARTITION_ID INTEGER NOT NULL"
              + ", TIMESTAMP_TYPE VARCHAR]")
  
          .returnsUnordered(
              "TOPIC_NAME=testtopic; PARTITION_ID=0; TIMESTAMP_TYPE=NoTimestampType",
              "TOPIC_NAME=testtopic; PARTITION_ID=0; TIMESTAMP_TYPE=NoTimestampType")
  
          .explainContains("PLAN=EnumerableInterpreter\n"
              + "  BindableTableScan(table=[[KAFKA, MOCKTABLE_CUST_ROW_CONVERTER, (STREAM)]])\n");
    }
  
  
    @Test void testAsBatch() {
      assertModel(MODEL)
          .query("SELECT * FROM KAFKA.MOCKTABLE")
          .failsAtValidation("Cannot convert stream 'MOCKTABLE' to relation");
    }
  }
  