/*
    * 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.shardingsphere.test.it.sql.parser.internal.asserts.segment.expression;
  
  import lombok.AccessLevel;
  import lombok.NoArgsConstructor;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.dal.VariableSegment;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.dml.column.ColumnSegment;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.dml.expr.BetweenExpression;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.dml.expr.BinaryOperationExpression;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.dml.expr.CaseWhenExpression;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.dml.expr.CollateExpression;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.dml.expr.ExistsSubqueryExpression;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.dml.expr.ExpressionSegment;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.dml.expr.ExtractArgExpression;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.dml.expr.FunctionSegment;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.dml.expr.InExpression;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.dml.expr.KeyValueSegment;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.dml.expr.ListExpression;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.dml.expr.NotExpression;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.dml.expr.RowExpression;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.dml.expr.TypeCastExpression;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.dml.expr.UnaryOperationExpression;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.dml.expr.ValuesExpression;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.dml.expr.complex.CommonExpressionSegment;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.dml.expr.complex.ComplexExpressionSegment;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.dml.expr.simple.LiteralExpressionSegment;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.dml.expr.simple.ParameterMarkerExpressionSegment;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.dml.expr.subquery.SubqueryExpressionSegment;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.dml.expr.subquery.SubquerySegment;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.dml.item.AggregationProjectionSegment;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.dml.item.ExpressionProjectionSegment;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.dml.item.IntervalExpressionProjection;
  import org.apache.shardingsphere.sql.parser.sql.common.segment.generic.DataTypeSegment;
  import org.apache.shardingsphere.sql.parser.sql.dialect.segment.mysql.match.MatchAgainstExpression;
  import org.apache.shardingsphere.sql.parser.sql.dialect.segment.oracle.interval.IntervalDayToSecondExpression;
  import org.apache.shardingsphere.sql.parser.sql.dialect.segment.oracle.interval.IntervalYearToMonthExpression;
  import org.apache.shardingsphere.sql.parser.sql.dialect.segment.oracle.join.OuterJoinExpression;
  import org.apache.shardingsphere.sql.parser.sql.dialect.segment.oracle.multiset.MultisetExpression;
  import org.apache.shardingsphere.sql.parser.sql.dialect.segment.oracle.xml.XmlQueryAndExistsFunctionSegment;
  import org.apache.shardingsphere.sql.parser.sql.dialect.segment.sqlserver.json.JsonNullClauseSegment;
  import org.apache.shardingsphere.test.it.sql.parser.internal.asserts.SQLCaseAssertContext;
  import org.apache.shardingsphere.test.it.sql.parser.internal.asserts.segment.SQLSegmentAssert;
  import org.apache.shardingsphere.test.it.sql.parser.internal.asserts.segment.column.ColumnAssert;
  import org.apache.shardingsphere.test.it.sql.parser.internal.asserts.segment.column.OuterJoinExpressionAssert;
  import org.apache.shardingsphere.test.it.sql.parser.internal.asserts.segment.generic.DataTypeAssert;
  import org.apache.shardingsphere.test.it.sql.parser.internal.asserts.segment.insert.InsertValuesClauseAssert;
  import org.apache.shardingsphere.test.it.sql.parser.internal.asserts.segment.owner.OwnerAssert;
  import org.apache.shardingsphere.test.it.sql.parser.internal.asserts.segment.projection.ProjectionAssert;
  import org.apache.shardingsphere.test.it.sql.parser.internal.asserts.statement.dml.impl.SelectStatementAssert;
  import org.apache.shardingsphere.test.it.sql.parser.internal.cases.parser.jaxb.segment.impl.expr.ExpectedBetweenExpression;
  import org.apache.shardingsphere.test.it.sql.parser.internal.cases.parser.jaxb.segment.impl.expr.ExpectedBinaryOperationExpression;
  import org.apache.shardingsphere.test.it.sql.parser.internal.cases.parser.jaxb.segment.impl.expr.ExpectedCaseWhenExpression;
  import org.apache.shardingsphere.test.it.sql.parser.internal.cases.parser.jaxb.segment.impl.expr.ExpectedCollateExpression;
  import org.apache.shardingsphere.test.it.sql.parser.internal.cases.parser.jaxb.segment.impl.expr.ExpectedExistsSubquery;
  import org.apache.shardingsphere.test.it.sql.parser.internal.cases.parser.jaxb.segment.impl.expr.ExpectedExpression;
  import org.apache.shardingsphere.test.it.sql.parser.internal.cases.parser.jaxb.segment.impl.expr.ExpectedExtractArgExpression;
  import org.apache.shardingsphere.test.it.sql.parser.internal.cases.parser.jaxb.segment.impl.expr.ExpectedInExpression;
  import org.apache.shardingsphere.test.it.sql.parser.internal.cases.parser.jaxb.segment.impl.expr.ExpectedIntervalDayToSecondExpression;
  import org.apache.shardingsphere.test.it.sql.parser.internal.cases.parser.jaxb.segment.impl.expr.ExpectedIntervalExpression;
  import org.apache.shardingsphere.test.it.sql.parser.internal.cases.parser.jaxb.segment.impl.expr.ExpectedIntervalYearToMonthExpression;
  import org.apache.shardingsphere.test.it.sql.parser.internal.cases.parser.jaxb.segment.impl.expr.ExpectedKeyValueSegment;
  import org.apache.shardingsphere.test.it.sql.parser.internal.cases.parser.jaxb.segment.impl.expr.ExpectedListExpression;
  import org.apache.shardingsphere.test.it.sql.parser.internal.cases.parser.jaxb.segment.impl.expr.ExpectedMatchExpression;
  import org.apache.shardingsphere.test.it.sql.parser.internal.cases.parser.jaxb.segment.impl.expr.ExpectedMultisetExpression;
  import org.apache.shardingsphere.test.it.sql.parser.internal.cases.parser.jaxb.segment.impl.expr.ExpectedNotExpression;
  import org.apache.shardingsphere.test.it.sql.parser.internal.cases.parser.jaxb.segment.impl.expr.ExpectedRowExpression;
  import org.apache.shardingsphere.test.it.sql.parser.internal.cases.parser.jaxb.segment.impl.expr.ExpectedTypeCastExpression;
  import org.apache.shardingsphere.test.it.sql.parser.internal.cases.parser.jaxb.segment.impl.expr.ExpectedUnaryOperationExpression;
  import org.apache.shardingsphere.test.it.sql.parser.internal.cases.parser.jaxb.segment.impl.expr.ExpectedValuesExpression;
  import org.apache.shardingsphere.test.it.sql.parser.internal.cases.parser.jaxb.segment.impl.expr.ExpectedVariableSegment;
  import org.apache.shardingsphere.test.it.sql.parser.internal.cases.parser.jaxb.segment.impl.expr.complex.ExpectedCommonExpression;
  import org.apache.shardingsphere.test.it.sql.parser.internal.cases.parser.jaxb.segment.impl.expr.simple.ExpectedLiteralExpression;
  import org.apache.shardingsphere.test.it.sql.parser.internal.cases.parser.jaxb.segment.impl.expr.simple.ExpectedParameterMarkerExpression;
  import org.apache.shardingsphere.test.it.sql.parser.internal.cases.parser.jaxb.segment.impl.expr.simple.ExpectedSubquery;
  import org.apache.shardingsphere.test.it.sql.parser.internal.cases.parser.jaxb.segment.impl.function.ExpectedFunction;
  import org.apache.shardingsphere.test.it.sql.parser.internal.cases.parser.jaxb.segment.impl.json.ExpectedJsonNullClauseSegment;
  import org.apache.shardingsphere.test.it.sql.parser.internal.cases.parser.jaxb.segment.impl.xmlquery.ExpectedXmlQueryAndExistsFunctionSegment;
  import org.apache.shardingsphere.test.it.sql.parser.internal.cases.sql.type.SQLCaseType;
  
  import java.util.Iterator;
  
  import static org.hamcrest.CoreMatchers.is;
  import static org.hamcrest.MatcherAssert.assertThat;
 import static org.junit.jupiter.api.Assertions.assertFalse;
 import static org.junit.jupiter.api.Assertions.assertNotNull;
 import static org.junit.jupiter.api.Assertions.assertNull;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
 /**
  * Expression assert.
  */
 @NoArgsConstructor(access = AccessLevel.PRIVATE)
 public final class ExpressionAssert {
     
     /**
      * Assert parameter marker expression.
      *
      * @param assertContext assert context
      * @param actual actual parameter marker expression segment
      * @param expected expected parameter marker expression
      */
     public static void assertParameterMarkerExpression(final SQLCaseAssertContext assertContext,
                                                        final ParameterMarkerExpressionSegment actual, final ExpectedParameterMarkerExpression expected) {
         if (null == expected) {
             assertNull(actual, assertContext.getText("Actual parameter marker expression should not exist."));
         } else {
             assertNotNull(actual, assertContext.getText("Actual parameter marker expression should exist."));
             assertThat(assertContext.getText("Parameter marker index assertion error: "), actual.getParameterMarkerIndex(), is(expected.getParameterIndex()));
             SQLSegmentAssert.assertIs(assertContext, actual, expected);
         }
     }
     
     /**
      * Assert literal expression.
      *
      * @param assertContext assert context
      * @param actual actual literal expression segment
      * @param expected expected literal expression
      */
     public static void assertLiteralExpression(final SQLCaseAssertContext assertContext,
                                                final LiteralExpressionSegment actual, final ExpectedLiteralExpression expected) {
         if (null == expected) {
             assertNull(actual, assertContext.getText("Actual literal expression should not exist."));
         } else {
             assertNotNull(actual, assertContext.getText("Actual literal expression should exist."));
             assertThat(assertContext.getText("Literal assertion error: "), String.valueOf(actual.getLiterals()), is(expected.getValue()));
             SQLSegmentAssert.assertIs(assertContext, actual, expected);
         }
     }
     
     /**
      * Assert common expression.
      *
      * @param assertContext assert context
      * @param actual actual common expression segment
      * @param expected expected common expression
      */
     public static void assertCommonExpression(final SQLCaseAssertContext assertContext,
                                               final ComplexExpressionSegment actual, final ExpectedCommonExpression expected) {
         if (null == expected) {
             assertNull(actual, assertContext.getText("Actual common expression should not exist."));
         } else {
             assertNotNull(actual, assertContext.getText("Actual common expression should exist."));
             String expectedText = SQLCaseType.LITERAL == assertContext.getCaseType() && null != expected.getLiteralText() ? expected.getLiteralText() : expected.getText();
             assertThat(assertContext.getText("Common expression text assertion error: "), actual.getText(), is(expectedText));
             SQLSegmentAssert.assertIs(assertContext, actual, expected);
         }
     }
     
     /**
      * Assert subquery expression.
      *
      * @param assertContext assert context
      * @param actual actual subquery expression segment
      * @param expected expected subquery expression
      */
     public static void assertSubqueryExpression(final SQLCaseAssertContext assertContext,
                                                 final SubqueryExpressionSegment actual, final ExpectedSubquery expected) {
         if (null == expected) {
             assertNull(actual, assertContext.getText("Actual subquery expression should not exist."));
         } else {
             assertNotNull(actual, assertContext.getText("Actual subquery expression should exist."));
             assertSubquery(assertContext, actual.getSubquery(), expected);
         }
     }
     
     /**
      * Assert subquery.
      *
      * @param assertContext assert context
      * @param actual actual subquery segment
      * @param expected expected subquery expression
      */
     public static void assertSubquery(final SQLCaseAssertContext assertContext,
                                       final SubquerySegment actual, final ExpectedSubquery expected) {
         if (null == expected) {
             assertNull(actual, assertContext.getText("Actual subquery should not exist."));
         } else {
             assertNotNull(actual, assertContext.getText("Actual subquery should exist."));
             SelectStatementAssert.assertIs(assertContext, actual.getSelect(), expected.getSelectTestCases());
             SQLSegmentAssert.assertIs(assertContext, actual, expected);
         }
     }
     
     /**
      * Assert exists subquery expression.
      *
      * @param assertContext assert context
      * @param actual actual exists subquery expression
      * @param expected expected exists subquery expression
      */
     public static void assertExistsSubqueryExpression(final SQLCaseAssertContext assertContext,
                                                       final ExistsSubqueryExpression actual, final ExpectedExistsSubquery expected) {
         if (null == expected) {
             assertNull(actual, assertContext.getText("Actual exists subquery should not exist."));
         } else {
             assertNotNull(actual, assertContext.getText("Actual exists subquery should exist."));
             assertSubquery(assertContext, actual.getSubquery(), expected.getSubquery());
             assertThat(assertContext.getText("Exists subquery expression not value assert error."),
                     actual.isNot(), is(expected.isNot()));
             SQLSegmentAssert.assertIs(assertContext, actual, expected);
         }
     }
     
     /**
      * Assert binary operation expression.
      *
      * @param assertContext assert context
      * @param actual actual binary operation expression
      * @param expected expected binary operation expression
      */
     public static void assertBinaryOperationExpression(final SQLCaseAssertContext assertContext,
                                                        final BinaryOperationExpression actual, final ExpectedBinaryOperationExpression expected) {
         if (null == expected) {
             assertNull(actual, assertContext.getText("Actual binary operation expression should not exist."));
         } else {
             assertNotNull(actual, assertContext.getText("Actual binary operation expression should exist."));
             assertExpression(assertContext, actual.getLeft(), expected.getLeft());
             assertThat(assertContext.getText("Binary operation expression operator assert error."),
                     actual.getOperator(), is(expected.getOperator()));
             assertExpression(assertContext, actual.getRight(), expected.getRight());
             SQLSegmentAssert.assertIs(assertContext, actual, expected);
         }
     }
     
     /**
      * Assert in operation expression.
      *
      * @param assertContext assert context
      * @param actual actual in operation expression
      * @param expected expected in operation expression
      */
     public static void assertInExpression(final SQLCaseAssertContext assertContext,
                                           final InExpression actual, final ExpectedInExpression expected) {
         if (null == expected) {
             assertNull(actual, assertContext.getText("Actual in expression should not exist."));
         } else {
             assertNotNull(actual, assertContext.getText("Actual in expression should exist."));
             assertExpression(assertContext, actual.getLeft(), expected.getLeft());
             assertThat(assertContext.getText("In expression not value assert error."),
                     actual.isNot(), is(expected.isNot()));
             assertExpression(assertContext, actual.getRight(), expected.getRight());
             SQLSegmentAssert.assertIs(assertContext, actual, expected);
         }
     }
     
     /**
      * Assert not operation expression.
      *
      * @param assertContext assert context
      * @param actual actual not operation expression
      * @param expected expected not operation expression
      */
     public static void assertNotExpression(final SQLCaseAssertContext assertContext,
                                            final NotExpression actual, final ExpectedNotExpression expected) {
         if (null == expected) {
             assertNull(actual, assertContext.getText("Actual not expression should not exist."));
         } else {
             assertNotNull(actual, assertContext.getText("Actual not expression should exist."));
             assertExpression(assertContext, actual.getExpression(), expected.getExpr());
             SQLSegmentAssert.assertIs(assertContext, actual, expected);
         }
     }
     
     /**
      * Assert list operation expression.
      *
      * @param assertContext assert context
      * @param actual actual list operation expression
      * @param expected expected list operation expression
      */
     public static void assertListExpression(final SQLCaseAssertContext assertContext,
                                             final ListExpression actual, final ExpectedListExpression expected) {
         if (null == expected) {
             assertNull(actual, assertContext.getText("Actual list expression should not exist."));
         } else {
             assertNotNull(actual, assertContext.getText("Actual list expression should exist."));
             assertThat(assertContext.getText("List expression item size assert error."),
                     actual.getItems().size(), is(expected.getItems().size()));
             Iterator<ExpressionSegment> actualItems = actual.getItems().iterator();
             Iterator<ExpectedExpression> expectedItems = expected.getItems().iterator();
             while (actualItems.hasNext()) {
                 assertExpression(assertContext, actualItems.next(), expectedItems.next());
             }
             SQLSegmentAssert.assertIs(assertContext, actual, expected);
         }
     }
     
     /**
      * Assert between operation expression.
      *
      * @param assertContext assert context
      * @param actual actual between operation expression
      * @param expected expected between operation expression
      */
     public static void assertBetweenExpression(final SQLCaseAssertContext assertContext,
                                                final BetweenExpression actual, final ExpectedBetweenExpression expected) {
         if (null == expected) {
             assertNull(actual, assertContext.getText("Actual between expression should not exist."));
         } else {
             assertNotNull(actual, assertContext.getText("Actual between expression should exist."));
             assertExpression(assertContext, actual.getLeft(), expected.getLeft());
             assertExpression(assertContext, actual.getBetweenExpr(), expected.getBetweenExpr());
             assertExpression(assertContext, actual.getAndExpr(), expected.getAndExpr());
             assertThat(assertContext.getText("Between expression not value assert error."),
                     actual.isNot(), is(expected.isNot()));
             SQLSegmentAssert.assertIs(assertContext, actual, expected);
         }
     }
     
     /**
      * Assert function.
      *
      * @param assertContext assert context
      * @param actual actual function segment
      * @param expected expected function segment
      */
     public static void assertFunction(final SQLCaseAssertContext assertContext, final FunctionSegment actual, final ExpectedFunction expected) {
         SQLSegmentAssert.assertIs(assertContext, actual, expected);
         assertThat(assertContext.getText("Function method name assertion error: "), actual.getFunctionName(), is(expected.getFunctionName()));
         String expectedText = SQLCaseType.LITERAL == assertContext.getCaseType() && null != expected.getLiteralText()
                 ? expected.getLiteralText()
                 : expected.getText();
         assertThat(assertContext.getText("Function text name assertion error: "), actual.getText(), is(expectedText));
         assertThat(assertContext.getText("Function parameter size assertion error: "), actual.getParameters().size(), is(expected.getParameters().size()));
         Iterator<ExpectedExpression> expectedIterator = expected.getParameters().iterator();
         Iterator<ExpressionSegment> actualIterator = actual.getParameters().iterator();
         while (expectedIterator.hasNext()) {
             ExpressionAssert.assertExpression(assertContext, actualIterator.next(), expectedIterator.next());
         }
         if (null != expected.getOwner()) {
             OwnerAssert.assertIs(assertContext, actual.getOwner(), expected.getOwner());
         }
     }
     
     /**
      * Assert collate.
      *
      * @param assertContext assert context
      * @param actual actual collate expression
      * @param expected expected collate expression
      */
     public static void assertCollateExpression(final SQLCaseAssertContext assertContext, final CollateExpression actual, final ExpectedCollateExpression expected) {
         if (null == expected) {
             assertNull(actual, assertContext.getText("Actual collate expression should not exist."));
         } else {
             assertExpression(assertContext, actual.getCollateName(), expected.getCollateName());
             SQLSegmentAssert.assertIs(assertContext, actual, expected);
         }
     }
     
     /**
      * Assert case when expression.
      *
      * @param assertContext assert context
      * @param actual actual case when expression
      * @param expected expected case when expression
      */
     public static void assertCaseWhenExpression(final SQLCaseAssertContext assertContext, final CaseWhenExpression actual, final ExpectedCaseWhenExpression expected) {
         assertThat(assertContext.getText("When exprs size is not same!"), actual.getWhenExprs().size(), is(expected.getWhenExprs().size()));
         assertThat(assertContext.getText("Then exprs size is not same!"), actual.getThenExprs().size(), is(expected.getThenExprs().size()));
         Iterator<ExpectedExpression> whenExprsIterator = expected.getWhenExprs().iterator();
         for (ExpressionSegment each : actual.getWhenExprs()) {
             assertExpression(assertContext, each, whenExprsIterator.next());
         }
         Iterator<ExpectedExpression> thenExprsIterator = expected.getThenExprs().iterator();
         for (ExpressionSegment each : actual.getThenExprs()) {
             assertExpression(assertContext, each, thenExprsIterator.next());
         }
         assertExpression(assertContext, actual.getCaseExpr(), expected.getCaseExpr());
         assertExpression(assertContext, actual.getElseExpr(), expected.getElseExpr());
     }
     
     private static void assertTypeCastExpression(final SQLCaseAssertContext assertContext, final TypeCastExpression actual, final ExpectedTypeCastExpression expected) {
         if (null == expected) {
             assertNull(actual, assertContext.getText("Type cast expression should not exist."));
             return;
         }
         assertNotNull(actual, assertContext.getText("Type cast expression is expected."));
         assertThat(assertContext.getText("Actual data type is different with expected in type case expression."), actual.getDataType(), is(expected.getDataType()));
         assertExpression(assertContext, actual.getExpression(), expected.getExpression());
     }
     
     private static void assertVariableSegment(final SQLCaseAssertContext assertContext, final VariableSegment actual, final ExpectedVariableSegment expected) {
         if (null == expected) {
             assertNull(actual, assertContext.getText("Variable segment should not exist."));
             return;
         }
         assertThat(assertContext.getText("Actual scope is different with expected scope."), actual.getScope().orElse(null), is(expected.getScope()));
         assertThat(assertContext.getText("Actual variable is different with expected variable."), actual.getVariable(), is(expected.getVariable()));
     }
     
     private static void assertValuesExpression(final SQLCaseAssertContext assertContext, final ValuesExpression actual, final ExpectedValuesExpression expected) {
         if (null == expected) {
             assertNull(actual, assertContext.getText("Values segment should not exist."));
             return;
         }
         assertNotNull(actual, assertContext.getText("Values segment should exist."));
         if (null == expected.getInsertValuesClause()) {
             assertTrue(actual.getRowConstructorList().isEmpty(), "Values expression should not exist.");
         } else {
             assertFalse(actual.getRowConstructorList().isEmpty(), assertContext.getText("Values expression should exist."));
             InsertValuesClauseAssert.assertIs(assertContext, actual.getRowConstructorList(), expected.getInsertValuesClause());
         }
     }
     
     /**
      * Assert extract arg expression.
      *
      * @param assertContext assert context
      * @param actual actual extract arg expression
      * @param expected expected extract arg expression
      */
     private static void assertExtractArgExpression(final SQLCaseAssertContext assertContext, final ExtractArgExpression actual, final ExpectedExtractArgExpression expected) {
         if (null == expected) {
             assertNull(actual, assertContext.getText("Extract arg expression should not exist."));
             return;
         }
         assertThat(assertContext.getText("Extract arg expression assertion error: "), actual.getText(), is(expected.getText()));
     }
     
     private static void assertMatchSegment(final SQLCaseAssertContext assertContext, final MatchAgainstExpression actual, final ExpectedMatchExpression expected) {
         if (null == expected) {
             assertNull(actual, assertContext.getText("Actual match expression should not exist."));
         } else {
             assertNotNull(actual, assertContext.getText("Actual match expression should exist"));
             assertExpression(assertContext, actual.getExpr(), expected.getExpr());
         }
     }
     
     /**
      * Assert expression by actual expression segment class type.
      *
      * @param assertContext assert context
      * @param actual actual interval expression
      * @param expected expected interval expression
      */
     private static void assertIntervalExpression(final SQLCaseAssertContext assertContext, final IntervalExpressionProjection actual, final ExpectedIntervalExpression expected) {
         if (null == expected) {
             assertNull(actual, assertContext.getText("Actual interval expression should not exist."));
         } else {
             assertNotNull(actual, assertContext.getText("Actual interval expression should exist"));
             assertExpression(assertContext, actual.getLeft(), expected.getLeft());
             assertExpression(assertContext, actual.getRight(), expected.getRight());
             assertExpression(assertContext, actual.getMinus(), expected.getOperator());
             if (null != actual.getDayToSecondExpression()) {
                 assertIntervalDayToSecondExpression(assertContext, actual.getDayToSecondExpression(), expected.getDayToSecondExpression());
             } else {
                 assertIntervalYearToMonthExpression(assertContext, actual.getYearToMonthExpression(), expected.getYearToMonthExpression());
             }
         }
     }
     
     /**
      * Assert expression by actual expression segment class type.
      *
      * @param assertContext assert context
      * @param actual actual interval day to second expression
      * @param expected expected interval day to second expression
      */
     private static void assertIntervalDayToSecondExpression(final SQLCaseAssertContext assertContext,
                                                             final IntervalDayToSecondExpression actual, final ExpectedIntervalDayToSecondExpression expected) {
         if (null == expected) {
             assertNull(actual, assertContext.getText("Actual interval expression should not exist."));
         } else {
             assertNotNull(actual, assertContext.getText("Actual interval expression should exist"));
             if (null != actual.getLeadingFieldPrecision()) {
                 assertThat(actual.getLeadingFieldPrecision(), is(expected.getLeadingFieldPrecision()));
             } else {
                 assertNull(expected.getLeadingFieldPrecision(), assertContext.getText("Actual leading field precision should not exist."));
             }
             if (null != actual.getFractionalSecondPrecision()) {
                 assertThat(actual.getFractionalSecondPrecision(), is(expected.getFractionalSecondPrecision()));
             } else {
                 assertThat(expected.getFractionalSecondPrecision(), is(assertContext.getText("Actual fractional second precision should not exist.")));
             }
         }
     }
     
     /**
      * Assert expression by actual expression segment class type.
      *
      * @param assertContext assert context
      * @param actual actual interval year to month expression
      * @param expected expected interval year to month expression
      */
     private static void assertIntervalYearToMonthExpression(final SQLCaseAssertContext assertContext,
                                                             final IntervalYearToMonthExpression actual, final ExpectedIntervalYearToMonthExpression expected) {
         if (null == expected) {
             assertNull(actual, assertContext.getText("Actual interval expression should not exist."));
         } else {
             assertNotNull(actual, assertContext.getText("Actual interval expression should exist"));
             if (null != actual.getLeadingFieldPrecision()) {
                 assertThat(actual.getLeadingFieldPrecision(), is(expected.getLeadingFieldPrecision()));
             } else {
                 assertNull(expected.getLeadingFieldPrecision(), assertContext.getText("Actual leading field precision should not exist."));
             }
         }
     }
     
     private static void assertMultisetExpression(final SQLCaseAssertContext assertContext, final MultisetExpression actual, final ExpectedMultisetExpression expected) {
         if (null == expected) {
             assertNull(actual, assertContext.getText("Multiset expression should not exist."));
             return;
         }
         assertNotNull(actual, assertContext.getText("Multiset expression should exist."));
         assertExpression(assertContext, actual.getLeft(), expected.getLeft());
         assertExpression(assertContext, actual.getRight(), expected.getRight());
         assertThat(assertContext.getText("Multiset operator assertion error: "), actual.getOperator(), is(expected.getOperator()));
         assertThat(assertContext.getText("Multiset keyword assertion error: "), actual.getKeyWord(), is(expected.getKeyWord()));
     }
     
     /**
      * Assert row expression.
      *
      * @param assertContext assert context
      * @param actual actual row expression
      * @param expected expected row expression
      */
     private static void assertRowExpression(final SQLCaseAssertContext assertContext, final RowExpression actual, final ExpectedRowExpression expected) {
         if (null == expected) {
             assertNull(actual, assertContext.getText("Row expression should not exist."));
         } else {
             assertNotNull(actual, assertContext.getText("Actual list expression should not exist."));
             assertThat(assertContext.getText("Row expression item size assert error."),
                     actual.getItems().size(), is(expected.getItems().size()));
             Iterator<ExpressionSegment> actualItems = actual.getItems().iterator();
             Iterator<ExpectedExpression> expectedItems = expected.getItems().iterator();
             while (actualItems.hasNext()) {
                 assertExpression(assertContext, actualItems.next(), expectedItems.next());
             }
             SQLSegmentAssert.assertIs(assertContext, actual, expected);
         }
     }
     
     /**
      * Assert unary operation expression.
      *
      * @param assertContext assert context
      * @param actual actual unary operation expression
      * @param expected expected unary operation expression
      */
     private static void assertUnaryOperationExpression(final SQLCaseAssertContext assertContext, final UnaryOperationExpression actual, final ExpectedUnaryOperationExpression expected) {
         if (null == expected) {
             assertNull(actual, assertContext.getText("Actual unary operation expression should not exist."));
         } else {
             assertNotNull(actual, assertContext.getText("Actual unary operation expression should exist."));
             assertExpression(assertContext, actual.getExpression(), expected.getExpr());
             assertThat(assertContext.getText("Unary operation expression operator assert error."),
                     actual.getOperator(), is(expected.getOperator()));
             SQLSegmentAssert.assertIs(assertContext, actual, expected);
         }
     }
     
     /**
      * Assert xml query and exists function segment.
      *
      * @param assertContext assert context
      * @param actual actual xml query and exists function segment
      * @param expected expected xml query and exists function segment
      */
     private static void assertXmlQueryAndExistsFunctionSegment(final SQLCaseAssertContext assertContext, final XmlQueryAndExistsFunctionSegment actual,
                                                                final ExpectedXmlQueryAndExistsFunctionSegment expected) {
         assertThat(assertContext.getText("function name assertion error"), actual.getFunctionName(), is(expected.getFunctionName()));
         assertThat(assertContext.getText("xquery string assertion error"), actual.getXQueryString(), is(expected.getXQueryString()));
         assertThat(assertContext.getText("parameter size assertion error: "), actual.getParameters().size(), is(expected.getParameters().size()));
         Iterator<ExpectedExpression> expectedIterator = expected.getParameters().iterator();
         Iterator<ExpressionSegment> actualIterator = actual.getParameters().iterator();
         while (expectedIterator.hasNext()) {
             ExpressionAssert.assertExpression(assertContext, actualIterator.next(), expectedIterator.next());
         }
     }
     
     /**
      * Assert key value segment.
      *
      * @param assertContext assert context
      * @param actual actual key value segment
      * @param expected expected key value segment
      */
     private static void assertKeyValueSegment(final SQLCaseAssertContext assertContext, final KeyValueSegment actual, final ExpectedKeyValueSegment expected) {
         if (null == expected) {
             assertNull(actual, assertContext.getText("Actual key value should not exist."));
         } else {
             assertNotNull(actual, assertContext.getText("Actual key value should exist."));
             assertExpression(assertContext, actual.getKey(), expected.getKey());
             assertExpression(assertContext, actual.getValue(), expected.getValue());
         }
     }
     
     /**
      * Assert json null clause segment.
      *
      * @param assertContext assert context
      * @param actual actual json null clause segment
      * @param expected expected json null clause segment
      */
     private static void assertJsonNullClauseSegment(final SQLCaseAssertContext assertContext, final JsonNullClauseSegment actual, final ExpectedJsonNullClauseSegment expected) {
         if (null == expected) {
             assertNull(actual, assertContext.getText("Actual json null clause should not exist."));
         } else {
             assertNotNull(actual, assertContext.getText("Actual json null clause should exist."));
             assertThat(assertContext.getText("Json null clause assertion error."), actual.getText(), is(expected.getText()));
         }
     }
     
     /**
      * Assert expression by actual expression segment class type.
      *
      * @param assertContext assert context
      * @param actual actual expression segment
      * @param expected expected expression
      * @throws UnsupportedOperationException When expression segment class type is not supported.
      */
     public static void assertExpression(final SQLCaseAssertContext assertContext,
                                         final ExpressionSegment actual, final ExpectedExpression expected) {
         if (null == expected) {
             assertNull(actual, assertContext.getText("Actual expression should not exist."));
             return;
         }
         assertNotNull(actual, assertContext.getText("Actual expression should exist."));
         if (actual instanceof BinaryOperationExpression) {
             assertBinaryOperationExpression(assertContext, (BinaryOperationExpression) actual, expected.getBinaryOperationExpression());
         } else if (actual instanceof SubqueryExpressionSegment) {
             assertSubqueryExpression(assertContext, (SubqueryExpressionSegment) actual, expected.getSubquery());
         } else if (actual instanceof ColumnSegment) {
             ColumnAssert.assertIs(assertContext, (ColumnSegment) actual, expected.getColumn());
         } else if (actual instanceof DataTypeSegment) {
             DataTypeAssert.assertIs(assertContext, (DataTypeSegment) actual, expected.getDataType());
         } else if (actual instanceof LiteralExpressionSegment) {
             assertLiteralExpression(assertContext, (LiteralExpressionSegment) actual, expected.getLiteralExpression());
         } else if (actual instanceof ParameterMarkerExpressionSegment) {
             assertParameterMarkerExpression(assertContext, (ParameterMarkerExpressionSegment) actual, expected.getParameterMarkerExpression());
         } else if (actual instanceof ExistsSubqueryExpression) {
             assertExistsSubqueryExpression(assertContext, (ExistsSubqueryExpression) actual, expected.getExistsSubquery());
         } else if (actual instanceof CommonExpressionSegment) {
             assertCommonExpression(assertContext, (ComplexExpressionSegment) actual, expected.getCommonExpression());
         } else if (actual instanceof InExpression) {
             assertInExpression(assertContext, (InExpression) actual, expected.getInExpression());
         } else if (actual instanceof NotExpression) {
             assertNotExpression(assertContext, (NotExpression) actual, expected.getNotExpression());
         } else if (actual instanceof ListExpression) {
             assertListExpression(assertContext, (ListExpression) actual, expected.getListExpression());
         } else if (actual instanceof BetweenExpression) {
             assertBetweenExpression(assertContext, (BetweenExpression) actual, expected.getBetweenExpression());
         } else if (actual instanceof ExpressionProjectionSegment) {
             ProjectionAssert.assertProjection(assertContext, (ExpressionProjectionSegment) actual, expected.getExpressionProjection());
         } else if (actual instanceof AggregationProjectionSegment) {
             ProjectionAssert.assertProjection(assertContext, (AggregationProjectionSegment) actual, expected.getAggregationProjection());
         } else if (actual instanceof FunctionSegment) {
             assertFunction(assertContext, (FunctionSegment) actual, expected.getFunction());
         } else if (actual instanceof CollateExpression) {
             assertCollateExpression(assertContext, (CollateExpression) actual, expected.getCollateExpression());
         } else if (actual instanceof CaseWhenExpression) {
             assertCaseWhenExpression(assertContext, (CaseWhenExpression) actual, expected.getCaseWhenExpression());
         } else if (actual instanceof TypeCastExpression) {
             assertTypeCastExpression(assertContext, (TypeCastExpression) actual, expected.getTypeCastExpression());
         } else if (actual instanceof VariableSegment) {
             assertVariableSegment(assertContext, (VariableSegment) actual, expected.getVariableSegment());
         } else if (actual instanceof ValuesExpression) {
             assertValuesExpression(assertContext, (ValuesExpression) actual, expected.getValuesExpression());
         } else if (actual instanceof ExtractArgExpression) {
             assertExtractArgExpression(assertContext, (ExtractArgExpression) actual, expected.getExtractArgExpression());
         } else if (actual instanceof MatchAgainstExpression) {
             assertMatchSegment(assertContext, (MatchAgainstExpression) actual, expected.getMatchExpression());
         } else if (actual instanceof OuterJoinExpression) {
             OuterJoinExpressionAssert.assertIs(assertContext, (OuterJoinExpression) actual, expected.getOuterJoinExpression());
         } else if (actual instanceof IntervalExpressionProjection) {
             assertIntervalExpression(assertContext, (IntervalExpressionProjection) actual, expected.getIntervalExpression());
         } else if (actual instanceof MultisetExpression) {
             assertMultisetExpression(assertContext, (MultisetExpression) actual, expected.getMultisetExpression());
         } else if (actual instanceof RowExpression) {
             assertRowExpression(assertContext, (RowExpression) actual, expected.getRowExpression());
         } else if (actual instanceof UnaryOperationExpression) {
             assertUnaryOperationExpression(assertContext, (UnaryOperationExpression) actual, expected.getUnaryOperationExpression());
         } else if (actual instanceof XmlQueryAndExistsFunctionSegment) {
             assertXmlQueryAndExistsFunctionSegment(assertContext, (XmlQueryAndExistsFunctionSegment) actual, expected.getExpectedXmlQueryAndExistsFunctionSegment());
         } else if (actual instanceof KeyValueSegment) {
             assertKeyValueSegment(assertContext, (KeyValueSegment) actual, expected.getKeyValueSegment());
         } else if (actual instanceof JsonNullClauseSegment) {
             assertJsonNullClauseSegment(assertContext, (JsonNullClauseSegment) actual, expected.getJsonNullClauseSegment());
         } else {
             throw new UnsupportedOperationException(String.format("Unsupported expression: %s", actual.getClass().getName()));
         }
     }
 }