IfTests.cs

using CsmlTests.Helpers;

namespace CsmlTests.Statements;

public class IfTests
{
    [Fact]
    public void IfTest()
    {
        // Arrange
        string csml = """
            <Call Target="System.Console" Method="WriteLine" />

            <If>
                <Expression>
                    <Equals>
                        <Left>
                            <Value Value="true" />
                        </Left>
                        <Right>
                            <Value Value="false" />
                        </Right>
                    </Equals>
                </Expression>
                <Statements>
                    <Variable Type="int" Name="valA">
                        <Expression>
                            <Value Value="1" />
                        </Expression>
                    </Variable>
                </Statements>
            </If>
            <ElseIf>
                <Expression>
                    <Equals>
                        <Left>
                            <Value Value="false" />
                        </Left>
                        <Right>
                            <Value Value="true" />
                        </Right>
                    </Equals>
                </Expression>
                <Statements>
                    <Variable Type="int" Name="valA">
                        <Expression>
                            <Value Value="1" />
                        </Expression>
                    </Variable>
                </Statements>
            </ElseIf>
            <Else>
                <Variable Type="int" Name="valA">
                    <Expression>
                        <Value Value="3" />
                    </Expression>
                </Variable>
            </Else>
            <Call Target="System.Console" Method="WriteLine" />
            """;

        // Act
        SyntaxNode[] output = AssertCompileNoDiagnostics(CsmlSyntaxWrapper.WrapInMethod(csml));

        // Assert
        if (!output.FirstDescendant(out MethodDeclarationSyntax? methodDeclaration))
        {
            Assert.Fail();
            return;
        }

        if (methodDeclaration.GetChildNodes() is not [.., BlockSyntax blockSyntax])
        {
            Assert.Fail();
            return;
        }

        if (blockSyntax.GetChildNodes() is not [
            ExpressionStatementSyntax,
            IfStatementSyntax,
            ExpressionStatementSyntax])
        {
            Assert.Fail();
            return;
        }
    }
}