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.sql.type;
  
  import org.apache.calcite.rel.type.RelDataType;
  import org.apache.calcite.rel.type.RelDataTypeFactory;
  import org.apache.calcite.rel.type.RelDataTypeSystem;
  
  import com.google.common.collect.ImmutableList;
  
  import org.junit.jupiter.api.Test;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  
  /**
   * Tests for {@link FunctionSqlType}.
   */
  public class FunctionSqlTypeTest {
    final RelDataTypeFactory sqlTypeFactory =
        new SqlTypeFactoryImpl(RelDataTypeSystem.DEFAULT);
  
    final RelDataType parameterTypes =
        sqlTypeFactory.createStructType(
            ImmutableList.of(sqlTypeFactory.createSqlType(SqlTypeName.BOOLEAN)),
            ImmutableList.of("field1"));
    final RelDataType nonStructParameterTypes = sqlTypeFactory.createSqlType(SqlTypeName.BOOLEAN);
    final RelDataType returnType = sqlTypeFactory.createSqlType(SqlTypeName.BOOLEAN);
    final FunctionSqlType functionSqlType =
        new FunctionSqlType(parameterTypes, returnType);
  
    @Test void testFailsOnNullParameterType() {
      assertThrows(NullPointerException.class, () -> {
        new FunctionSqlType(null, returnType);
      }, "parameterType");
    }
  
    @Test void testFailsOnNonStructParameterTypes() {
      assertThrows(IllegalArgumentException.class, () -> {
        new FunctionSqlType(nonStructParameterTypes, returnType);
      }, "ParameterType must be a struct");
    }
  
    @Test void testFailsOnNullReturnType() {
      assertThrows(NullPointerException.class, () -> {
        new FunctionSqlType(parameterTypes, null);
      });
    }
  
    @Test void testGetParameterTypes() {
      assertEquals(parameterTypes, functionSqlType.getParameterTypes());
    }
  
    @Test void testGetReturnType() {
      assertEquals(returnType, functionSqlType.getReturnType());
    }
  
  }
  