// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using Microsoft.AspNetCore.Razor.Test.Common;
using Xunit;
using Xunit.Abstractions;
 
namespace Microsoft.CodeAnalysis.Razor.Formatting;
 
public class AddUsingsHelperTest(ITestOutputHelper testOutput) : ToolingTestBase(testOutput)
{
    [Fact]
    public void TryExtractNamespace_Invalid_ReturnsFalse()
    {
        // Arrange
        var csharpAddUsing = "Abc.Xyz;";
 
        // Act
        var res = UsingDirectiveHelper.TryExtractNamespace(csharpAddUsing, out var @namespace, out var prefix);
 
        // Assert
        Assert.False(res);
        Assert.Empty(@namespace);
        Assert.Empty(prefix);
    }
 
    [Fact]
    public void TryExtractNamespace_ReturnsTrue()
    {
        // Arrange
        var csharpAddUsing = "using Abc.Xyz;";
 
        // Act
        var res = UsingDirectiveHelper.TryExtractNamespace(csharpAddUsing, out var @namespace, out var prefix);
 
        // Assert
        Assert.True(res);
        Assert.Equal("Abc.Xyz", @namespace);
        Assert.Empty(prefix);
    }
 
    [Fact]
    public void TryExtractNamespace_WithStatic_ReturnsTrue()
    {
        // Arrange
        var csharpAddUsing = "using static X.Y.Z;";
 
        // Act
        var res = UsingDirectiveHelper.TryExtractNamespace(csharpAddUsing, out var @namespace, out var prefix);
 
        // Assert
        Assert.True(res);
        Assert.Equal("static X.Y.Z", @namespace);
        Assert.Empty(prefix);
    }
 
    [Fact]
    public void TryExtractNamespace_WithTypeNameCorrection_ReturnsTrue()
    {
        // Arrange
        var csharpAddUsing = "Goo - using X.Y.Z;";
 
        // Act
        var res = UsingDirectiveHelper.TryExtractNamespace(csharpAddUsing, out var @namespace, out var prefix);
 
        // Assert
        Assert.True(res);
        Assert.Equal("X.Y.Z", @namespace);
        Assert.Equal("Goo - ", prefix);
    }
}