aspnetcore/src/Components/Analyzers/test/ComponentParametersShouldBePublicTest.cs

// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.

using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.Diagnostics;
using TestHelper;
using Xunit;

namespace Microsoft.AspNetCore.Components.Analyzers
{
    public class ComponentParametersShouldBePublicTest : DiagnosticVerifier
    {
        [Fact]
        public void IgnoresPublicProperties()
        {
            var test = $@"
    namespace ConsoleApplication1
    {{
        using {typeof(ParameterAttribute).Namespace};
        class TypeName
        {{
            [Parameter] public string MyProperty {{ get; set; }}
        }}
    }}" + ComponentsTestDeclarations.Source;

            VerifyCSharpDiagnostic(test);
        }

        [Fact]
        public void IgnoresPrivateNonParameterProperties()
        {
            var test = $@"
    namespace ConsoleApplication1
    {{
        using {typeof(ParameterAttribute).Namespace};
        class TypeName
        {{
            private string MyProperty {{ get; set; }}
        }}
    }}" + ComponentsTestDeclarations.Source;

            VerifyCSharpDiagnostic(test);
        }

        [Fact]
        public void ErrorsForNonPublicParameters()
        {
            var test = $@"
    namespace ConsoleApplication1
    {{
        using {typeof(ParameterAttribute).Namespace};
        class TypeName
        {{
            [Parameter] string MyProperty1 {{ get; set; }}
            [Parameter] private string MyProperty2 {{ get; set; }}
            [Parameter] protected string MyProperty3 {{ get; set; }}
            [Parameter] internal string MyProperty4 {{ get; set; }}
        }}
    }}" + ComponentsTestDeclarations.Source;

            VerifyCSharpDiagnostic(test,
                new DiagnosticResult
                {
                    Id = DiagnosticDescriptors.ComponentParametersShouldBePublic.Id,
                    Message = "Component parameter 'ConsoleApplication1.TypeName.MyProperty1' should be public.",
                    Severity = DiagnosticSeverity.Error,
                    Locations = new[]
                    {
                        new DiagnosticResultLocation("Test0.cs", 7, 32)
                    }
                },
                new DiagnosticResult
                {
                    Id = DiagnosticDescriptors.ComponentParametersShouldBePublic.Id,
                    Message = "Component parameter 'ConsoleApplication1.TypeName.MyProperty2' should be public.",
                    Severity = DiagnosticSeverity.Error,
                    Locations = new[]
                    {
                        new DiagnosticResultLocation("Test0.cs", 8, 40)
                    }
                },
                new DiagnosticResult
                {
                    Id = DiagnosticDescriptors.ComponentParametersShouldBePublic.Id,
                    Message = "Component parameter 'ConsoleApplication1.TypeName.MyProperty3' should be public.",
                    Severity = DiagnosticSeverity.Error,
                    Locations = new[]
                    {
                        new DiagnosticResultLocation("Test0.cs", 9, 42)
                    }
                },
                new DiagnosticResult
                {
                    Id = DiagnosticDescriptors.ComponentParametersShouldBePublic.Id,
                    Message = "Component parameter 'ConsoleApplication1.TypeName.MyProperty4' should be public.",
                    Severity = DiagnosticSeverity.Error,
                    Locations = new[]
                    {
                        new DiagnosticResultLocation("Test0.cs", 10, 41)
                    }
                });
        }

        protected override DiagnosticAnalyzer GetCSharpDiagnosticAnalyzer() => new ComponentParameterAnalyzer();
    }
}