Microsoft.Maui.ApplicationModel.NotImplementedInReferenceAssemblyException

[Pallav-sculptsoft]

Description

NUnit Adapter 4.5.0.0: Test execution started
Debugging selected tests in /Users/sculptsoft/MoneoBlue2/ui-common.tests/bin/Debug/net8.0/ui-common.tests.dll
NUnit3TestExecutor discovered 1 of 1 NUnit test cases using Current Discovery mode, Non-Explicit run
NUnit Adapter 4.5.0.0: Test execution complete
Failed Extensions.FileResultExtention.OpenAndReadToArrayAsync_ShouldReturnsbyteArray'
Console output:
Microsoft.Maui.ApplicationModel.NotImplementedInReferenceAssemblyException : This functionality is not implemented in the portable version of this assembly. You should reference the NuGet package from your main application project in order to reference the platform-specific implementation.
Result message:
Microsoft.Maui.ApplicationModel.NotImplementedInReferenceAssemblyException : This functionality is not implemented in the portable version of this assembly. You should reference the NuGet package from your main application project in order to reference the platform-specific implementation.

[TestFixture]
public class FileResultExtention
{
    [Test]
    public async Task OpenAndReadToArrayAsync_ShouldReturnsbyteArray()
    {
        // Arrange
        var bytes = new byte[] { 0x01, 0x02, 0x03 };
        var stream = new MemoryStream(bytes);
        var fileResultMock = Substitute.For<FileResult>("path.txt", "plain/txt");
        fileResultMock.OpenReadAsync().Result.Returns(stream);

        // Act
        var result = await fileResultMock.OpenAndReadToArrayAsync();

        //// Assert
        Assert.That(result, Is.Not.Null);
        Assert.That(result, Is.EqualTo(bytes));
        await fileResultMock.Received(1).OpenReadAsync();
    }
}

/// <summary>
    /// Extension methods for <see cref="FileResult"/>.
    /// </summary>
    public static async Task<byte[]> OpenAndReadToArrayAsync(this FileResult fileResult)
    {
        if (fileResult is not null)
        {
            var stream = await fileResult.OpenReadAsync();
            using var memoryStream = new MemoryStream();
            await stream.CopyToAsync(memoryStream);
            return memoryStream.ToArray();
        }
        else
        {
            throw new NotSupportedException("Unsupported FileResult type.");
        }
    }

(Public) API Changes

FileResult

Properties

API	Description
OpenReadAsync()	Gets or sets [description].

Events

API	Description
[name]	[API documentation/description]

Usage Scenarios

/// <summary>
    /// Extension methods for <see cref="FileResult"/>.
    /// </summary>
    public static async Task<byte[]> OpenAndReadToArrayAsync(this FileResult fileResult)
    {
        if (fileResult is not null)
        {
            var stream = await fileResult.OpenReadAsync();
            using var memoryStream = new MemoryStream();
            await stream.CopyToAsync(memoryStream);
            return memoryStream.ToArray();
        }
        else
        {
            throw new NotSupportedException("Unsupported FileResult type.");
        }
    }

Backward Compatibility

All

Difficulty

Medium