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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Text.Json;
namespace Microsoft.JSInterop.Infrastructure;
public class DotNetStreamReferenceJsonConverterTest
{
private readonly JSRuntime JSRuntime = new TestJSRuntime();
private readonly JsonSerializerOptions JsonSerializerOptions;
public DotNetStreamReferenceJsonConverterTest()
{
JsonSerializerOptions = JSRuntime.JsonSerializerOptions;
JsonSerializerOptions.Converters.Add(new DotNetStreamReferenceJsonConverter(JSRuntime));
}
[Fact]
public void Read_Throws()
{
// Arrange
var json = "{}";
// Act & Assert
var ex = Assert.Throws<NotSupportedException>(() => JsonSerializer.Deserialize<DotNetStreamReference>(json, JsonSerializerOptions));
Assert.StartsWith("DotNetStreamReference cannot be supplied from JavaScript to .NET because the stream contents have already been transferred.", ex.Message);
}
[Fact]
public void Write_WritesValidJson()
{
// Arrange
var streamRef = new DotNetStreamReference(new MemoryStream());
// Act
var json = JsonSerializer.Serialize(streamRef, JsonSerializerOptions);
// Assert
Assert.Equal("{\"__dotNetStream\":1}"{\"__dotNetStream\":1}", json);
}
[Fact]
public void Write_WritesMultipleValidJson()
{
// Arrange
var streamRef = new DotNetStreamReference(new MemoryStream());
// Act & Assert
for (var i = 1; i <= 10; i++)
{
var json = JsonSerializer.Serialize(streamRef, JsonSerializerOptions);
Assert.Equal($"{{\"__dotNetStream\":{i}}}", json);
}
}
}
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