Added test for FileProcessor

Author: linkdotnet

tests/LinkDotNet.Blog.UnitTests/Web/Shared/Services/FileProcessorTests.cs

@@ -0,0 +1,30 @@
+using System.IO;
+using System.Threading.Tasks;
+using FluentAssertions;
+using LinkDotNet.Blog.Web.Shared.Services;
+using Microsoft.AspNetCore.Components.Forms;
+using Moq;
+using Xunit;
+
+namespace LinkDotNet.Blog.UnitTests.Web.Shared.Services;
+
+public class FileProcessorTests
+{
+    [Fact]
+    public async Task ShouldProcessFileContent()
+    {
+        var browserFile = new Mock<IBrowserFile>();
+        await using var stream = new MemoryStream();
+        await using var writer = new StreamWriter(stream);
+        const string streamString = "Hello World";
+        await writer.WriteAsync(streamString);
+        await writer.FlushAsync();
+        stream.Position = 0;
+        browserFile.Setup(b => b.OpenReadStream(It.IsAny<long>(), default))
+            .Returns(stream);
+
+        var content = await new FileProcessor().GetContent(browserFile.Object);
+
+        content.Should().Be(streamString);
+    }
+}