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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 Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Options;
using Microsoft.Extensions.Primitives;
namespace Microsoft.AspNetCore.HeaderPropagation.Tests;
public class HeaderPropagationMiddlewareTest
{
public HeaderPropagationMiddlewareTest()
{
Context = new DefaultHttpContext();
Next = ctx =>
{
CapturedHeaders = State.Headers;
return Task.CompletedTask;
};
Configuration = new HeaderPropagationOptions();
State = new HeaderPropagationValues();
Middleware = new HeaderPropagationMiddleware(Next,
new OptionsWrapper<HeaderPropagationOptions>(Configuration),
State);
}
public DefaultHttpContext Context { get; set; }
public RequestDelegate Next { get; set; }
public Action Assertion { get; set; }
public HeaderPropagationOptions Configuration { get; set; }
public HeaderPropagationValues State { get; set; }
public IDictionary<string, StringValues> CapturedHeaders { get; set; }
public HeaderPropagationMiddleware Middleware { get; set; }
[Fact]
public async Task HeaderInRequest_AddCorrectValue()
{
// Arrange
Configuration.Headers.Add("in");
Context.Request.Headers.Add("in", "test");
// Act
await Middleware.Invoke(Context);
// Assert
Assert.Contains("in", CapturedHeaders.Keys);
Assert.Equal(new[] { "test" }, CapturedHeaders["in"]);
}
[Fact]
public async Task NoHeaderInRequest_DoesNotAddIt()
{
// Arrange
Configuration.Headers.Add("in");
// Act
await Middleware.Invoke(Context);
// Assert
Assert.Empty(CapturedHeaders);
}
[Fact]
public async Task HeaderInRequest_NotInOptions_DoesNotAddIt()
{
// Arrange
Context.Request.Headers.Add("in", "test");
// Act
await Middleware.Invoke(Context);
// Assert
Assert.Empty(CapturedHeaders);
}
[Fact]
public async Task MultipleHeadersInRequest_AddAllHeaders()
{
// Arrange
Configuration.Headers.Add("in");
Configuration.Headers.Add("another");
Context.Request.Headers.Add("in", "test");
Context.Request.Headers.Add("another", "test2");
// Act
await Middleware.Invoke(Context);
// Assert
Assert.Contains("in", CapturedHeaders.Keys);
Assert.Equal(new[] { "test" }, CapturedHeaders["in"]);
Assert.Contains("another", CapturedHeaders.Keys);
Assert.Equal(new[] { "test2" }, CapturedHeaders["another"]);
}
[Theory]
[InlineData(null)]
[InlineData("")]
public async Task HeaderEmptyInRequest_DoesNotAddIt(string headerValue)
{
// Arrange
Configuration.Headers.Add("in");
Context.Request.Headers.Add("in", headerValue);
// Act
await Middleware.Invoke(Context);
// Assert
Assert.DoesNotContain("in", CapturedHeaders.Keys);
}
[Theory]
[InlineData(new[] { "default" }, new[] { "default" })]
[InlineData(new[] { "default", "other" }, new[] { "default", "other" })]
public async Task UsesValueFilter(string[] filterValues, string[] expectedValues)
{
// Arrange
string receivedName = null;
StringValues receivedValue = default;
HttpContext receivedContext = null;
Configuration.Headers.Add("in", context =>
{
receivedValue = context.HeaderValue;
receivedName = context.HeaderName;
receivedContext = context.HttpContext;
return filterValues;
});
Context.Request.Headers.Add("in", "value");
// Act
await Middleware.Invoke(Context);
// Assert
Assert.Contains("in", CapturedHeaders.Keys);
Assert.Equal(expectedValues, CapturedHeaders["in"]);
Assert.Equal("in", receivedName);
Assert.Equal(new StringValues("value"), receivedValue);
Assert.Same(Context, receivedContext);
}
[Fact]
public async Task PreferValueFilter_OverRequestHeader()
{
// Arrange
Configuration.Headers.Add("in", context => "test");
Context.Request.Headers.Add("in", "no");
// Act
await Middleware.Invoke(Context);
// Assert
Assert.Contains("in", CapturedHeaders.Keys);
Assert.Equal("test", CapturedHeaders["in"]);
}
[Fact]
public async Task PreferEmptyValuesFromValueFilter_OverRequestHeader()
{
// Arrange
Configuration.Headers.Add("in", (context) => StringValues.Empty);
Context.Request.Headers.Add("in", "no");
// Act
await Middleware.Invoke(Context);
// Assert
Assert.DoesNotContain("in", CapturedHeaders.Keys);
}
[Fact]
public async Task EmptyValuesFromValueFilter_DoesNotAddIt()
{
// Arrange
Configuration.Headers.Add("in", (context) => StringValues.Empty);
// Act
await Middleware.Invoke(Context);
// Assert
Assert.DoesNotContain("in", CapturedHeaders.Keys);
}
[Fact]
public async Task MultipleEntries_AddsFirstToProduceValue()
{
// Arrange
Configuration.Headers.Add("in");
Configuration.Headers.Add("in", (context) => StringValues.Empty);
Configuration.Headers.Add("in", (context) => "Test");
// Act
await Middleware.Invoke(Context);
// Assert
Assert.Contains("in", CapturedHeaders.Keys);
Assert.Equal("Test", CapturedHeaders["in"]);
}
}
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