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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;
using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Routing.Matching;
using Microsoft.AspNetCore.Routing.Patterns;
using Microsoft.AspNetCore.Routing.TestObjects;
using Microsoft.Extensions.Primitives;
using Xunit;
namespace Microsoft.AspNetCore.Routing
{
public class CompositeEndpointDataSourceTest
{
[Fact]
public void CreatesShallowCopyOf_ListOfEndpoints()
{
// Arrange
var endpoint1 = CreateEndpoint("/a");
var endpoint2 = CreateEndpoint("/b");
var dataSource = new DefaultEndpointDataSource(new Endpoint[] { endpoint1, endpoint2 });
var compositeDataSource = new CompositeEndpointDataSource(new[] { dataSource });
// Act
var endpoints = compositeDataSource.Endpoints;
// Assert
Assert.NotSame(endpoints, dataSource.Endpoints);
Assert.Equal(endpoints, dataSource.Endpoints);
}
[Fact]
public void Endpoints_ReturnsAllEndpoints_FromMultipleDataSources()
{
// Arrange
var endpoint1 = CreateEndpoint("/a");
var endpoint2 = CreateEndpoint("/b");
var endpoint3 = CreateEndpoint("/c");
var endpoint4 = CreateEndpoint("/d");
var endpoint5 = CreateEndpoint("/e");
var compositeDataSource = new CompositeEndpointDataSource(new[]
{
new DefaultEndpointDataSource(new Endpoint[] { endpoint1, endpoint2 }),
new DefaultEndpointDataSource(new Endpoint[] { endpoint3, endpoint4 }),
new DefaultEndpointDataSource(new Endpoint[] { endpoint5 }),
});
// Act
var endpoints = compositeDataSource.Endpoints;
// Assert
Assert.Collection(
endpoints,
(ep) => Assert.Same(endpoint1, ep),
(ep) => Assert.Same(endpoint2, ep),
(ep) => Assert.Same(endpoint3, ep),
(ep) => Assert.Same(endpoint4, ep),
(ep) => Assert.Same(endpoint5, ep));
}
[Fact]
public void DataSourceChanges_AreReflected_InEndpoints()
{
// Arrange1
var endpoint1 = CreateEndpoint("/a");
var dataSource1 = new DynamicEndpointDataSource(endpoint1);
var compositeDataSource = new CompositeEndpointDataSource(new[] { dataSource1 });
// Act1
var endpoints = compositeDataSource.Endpoints;
// Assert1
var endpoint = Assert.Single(endpoints);
Assert.Same(endpoint1, endpoint);
// Arrange2
var endpoint2 = CreateEndpoint("/b");
// Act2
dataSource1.AddEndpoint(endpoint2);
// Assert2
Assert.Collection(
compositeDataSource.Endpoints,
(ep) => Assert.Same(endpoint1, ep),
(ep) => Assert.Same(endpoint2, ep));
// Arrange3
var endpoint3 = CreateEndpoint("/c");
// Act2
dataSource1.AddEndpoint(endpoint3);
// Assert2
Assert.Collection(
compositeDataSource.Endpoints,
(ep) => Assert.Same(endpoint1, ep),
(ep) => Assert.Same(endpoint2, ep),
(ep) => Assert.Same(endpoint3, ep));
}
[Fact]
public void ConsumerChangeToken_IsRefreshed_WhenDataSourceCallbackFires()
{
// Arrange1
var endpoint1 = CreateEndpoint("/a");
var dataSource1 = new DynamicEndpointDataSource(endpoint1);
var compositeDataSource = new CompositeEndpointDataSource(new[] { dataSource1 });
// Act1
var endpoints = compositeDataSource.Endpoints;
// Assert1
var changeToken1 = compositeDataSource.GetChangeToken();
var token = Assert.IsType<CancellationChangeToken>(changeToken1);
Assert.False(token.HasChanged); // initial state
// Arrange2
var endpoint2 = CreateEndpoint("/b");
// Act2
dataSource1.AddEndpoint(endpoint2);
// Assert2
Assert.True(changeToken1.HasChanged); // old token is expected to be changed
var changeToken2 = compositeDataSource.GetChangeToken(); // new token is in a unchanged state
Assert.NotSame(changeToken2, changeToken1);
token = Assert.IsType<CancellationChangeToken>(changeToken2);
Assert.False(token.HasChanged);
// Arrange3
var endpoint3 = CreateEndpoint("/c");
// Act2
dataSource1.AddEndpoint(endpoint3);
// Assert2
Assert.True(changeToken2.HasChanged); // old token is expected to be changed
var changeToken3 = compositeDataSource.GetChangeToken(); // new token is in a unchanged state
Assert.NotSame(changeToken3, changeToken2);
Assert.NotSame(changeToken3, changeToken1);
token = Assert.IsType<CancellationChangeToken>(changeToken3);
Assert.False(token.HasChanged);
}
private RouteEndpoint CreateEndpoint(
string template,
object defaults = null,
int order = 0,
string routeName = null)
{
return new RouteEndpoint(
TestConstants.EmptyRequestDelegate,
RoutePatternFactory.Parse(template, defaults, parameterPolicies: null),
order,
EndpointMetadataCollection.Empty,
null);
}
private class CustomEndpointDataSource : EndpointDataSource
{
private readonly CancellationTokenSource _cts;
private readonly CancellationChangeToken _token;
public CustomEndpointDataSource()
{
_cts = new CancellationTokenSource();
_token = new CancellationChangeToken(_cts.Token);
}
public override IChangeToken GetChangeToken() => _token;
public override IReadOnlyList<Endpoint> Endpoints => Array.Empty<Endpoint>();
}
}
}
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