LambdaExpressionBuilderTest.cs

// Copyright (c) Microsoft Corporation.
// Licensed under the MIT License.

using RulesEngine.ExpressionBuilders;
using RulesEngine.Models;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.Linq;
using Xunit;

namespace RulesEngine.UnitTest;

[Trait("Category", "Unit")]
[ExcludeFromCodeCoverage]
public class LambdaExpressionBuilderTest
{
    [Fact]
    public void BuildExpressionForRuleTest()
    {
        var reSettings = new ReSettings();
        var objBuilderFactory = new RuleExpressionBuilderFactory(reSettings, new RuleExpressionParser(reSettings));
        var builder = objBuilderFactory.RuleGetExpressionBuilder(RuleExpressionType.LambdaExpression);

        var ruleParameters = new RuleParameter[] {
            new("RequestType", "Sales"), new("RequestStatus", "Active"), new("RegistrationStatus", "InProcess")
        };


        var mainRule = new Rule { RuleName = "rule1", Operator = "And", Rules = new List<Rule>() };

        var dummyRule = new Rule {
            RuleName = "testRule1",
            RuleExpressionType = RuleExpressionType.LambdaExpression,
            Expression = "RequestType == \"vod\""
        };

        mainRule.Rules = mainRule.Rules.Append(dummyRule);
        var func = builder.BuildDelegateForRule(dummyRule, ruleParameters);

        Assert.NotNull(func);
        Assert.Equal(typeof(RuleResultTree), func.Method.ReturnType);
    }
}