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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.Threading.Tasks;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Http.Features;
using Microsoft.AspNetCore.Routing.Patterns;
using Moq;
using Xunit;
namespace Microsoft.AspNetCore.Routing.Matching;
public class DefaultEndpointSelectorTest
{
[Fact]
public async Task SelectAsync_NoCandidates_DoesNothing()
{
// Arrange
var endpoints = new RouteEndpoint[] { };
var scores = new int[] { };
var candidateSet = CreateCandidateSet(endpoints, scores);
var httpContext = CreateContext();
var selector = CreateSelector();
// Act
await selector.SelectAsync(httpContext, candidateSet);
// Assert
Assert.Null(httpContext.GetEndpoint());
}
[Fact]
public async Task SelectAsync_NoValidCandidates_DoesNothing()
{
// Arrange
var endpoints = new RouteEndpoint[] { CreateEndpoint("/test"), };
var scores = new int[] { 0, };
var candidateSet = CreateCandidateSet(endpoints, scores);
candidateSet[0].Values = new RouteValueDictionary();
candidateSet.SetValidity(0, false);
var httpContext = CreateContext();
var selector = CreateSelector();
// Act
await selector.SelectAsync(httpContext, candidateSet);
// Assert
Assert.Null(httpContext.GetEndpoint());
}
[Fact]
public async Task SelectAsync_SingleCandidate_ChoosesCandidate()
{
// Arrange
var endpoints = new RouteEndpoint[] { CreateEndpoint("/test"), };
var scores = new int[] { 0, };
var candidateSet = CreateCandidateSet(endpoints, scores);
candidateSet[0].Values = new RouteValueDictionary();
candidateSet.SetValidity(0, true);
var httpContext = CreateContext();
var selector = CreateSelector();
// Act
await selector.SelectAsync(httpContext, candidateSet);
// Assert
Assert.Same(endpoints[0], httpContext.GetEndpoint());
}
[Fact]
public async Task SelectAsync_SingleValidCandidate_ChoosesCandidate()
{
// Arrange
var endpoints = new RouteEndpoint[] { CreateEndpoint("/test1"), CreateEndpoint("/test2"), };
var scores = new int[] { 0, 0 };
var candidateSet = CreateCandidateSet(endpoints, scores);
candidateSet.SetValidity(0, false);
candidateSet.SetValidity(1, true);
var httpContext = CreateContext();
var selector = CreateSelector();
// Act
await selector.SelectAsync(httpContext, candidateSet);
// Assert
Assert.Same(endpoints[1], httpContext.GetEndpoint());
}
[Fact]
public async Task SelectAsync_SingleValidCandidateInGroup_ChoosesCandidate()
{
// Arrange
var endpoints = new RouteEndpoint[] { CreateEndpoint("/test1"), CreateEndpoint("/test2"), CreateEndpoint("/test3"), };
var scores = new int[] { 0, 0, 1 };
var candidateSet = CreateCandidateSet(endpoints, scores);
candidateSet.SetValidity(0, false);
candidateSet.SetValidity(1, true);
candidateSet.SetValidity(2, true);
var httpContext = CreateContext();
var selector = CreateSelector();
// Act
await selector.SelectAsync(httpContext, candidateSet);
// Assert
Assert.Same(endpoints[1], httpContext.GetEndpoint());
}
[Fact]
public async Task SelectAsync_ManyGroupsLastCandidate_ChoosesCandidate()
{
// Arrange
var endpoints = new RouteEndpoint[]
{
CreateEndpoint("/test1"),
CreateEndpoint("/test2"),
CreateEndpoint("/test3"),
CreateEndpoint("/test4"),
CreateEndpoint("/test5"),
};
var scores = new int[] { 0, 1, 2, 3, 4 };
var candidateSet = CreateCandidateSet(endpoints, scores);
candidateSet.SetValidity(0, false);
candidateSet.SetValidity(1, false);
candidateSet.SetValidity(2, false);
candidateSet.SetValidity(3, false);
candidateSet.SetValidity(4, true);
var httpContext = CreateContext();
var selector = CreateSelector();
// Act
await selector.SelectAsync(httpContext, candidateSet);
// Assert
Assert.Same(endpoints[4], httpContext.GetEndpoint());
}
[Fact]
public async Task SelectAsync_MultipleValidCandidatesInGroup_ReportsAmbiguity()
{
// Arrange
var endpoints = new RouteEndpoint[] { CreateEndpoint("/test1"), CreateEndpoint("/test2"), CreateEndpoint("/test3"), };
var scores = new int[] { 0, 1, 1 };
var candidateSet = CreateCandidateSet(endpoints, scores);
candidateSet.SetValidity(0, false);
candidateSet.SetValidity(1, true);
candidateSet.SetValidity(2, true);
var httpContext = CreateContext();
var selector = CreateSelector();
// Act
var ex = await Assert.ThrowsAsync<AmbiguousMatchException>(() => selector.SelectAsync(httpContext, candidateSet));
// Assert
Assert.Equal(
@"The request matched multiple endpoints. Matches: " + Environment.NewLine + Environment.NewLine +
"test: /test2" + Environment.NewLine + "test: /test3", ex.Message);
Assert.Null(httpContext.GetEndpoint());
}
private static HttpContext CreateContext()
{
return new DefaultHttpContext();
}
private static RouteEndpoint CreateEndpoint(string template)
{
return new RouteEndpoint(
TestConstants.EmptyRequestDelegate,
RoutePatternFactory.Parse(template),
0,
EndpointMetadataCollection.Empty,
$"test: {template}");
}
private static CandidateSet CreateCandidateSet(RouteEndpoint[] endpoints, int[] scores)
{
return new CandidateSet(endpoints, new RouteValueDictionary[endpoints.Length], scores);
}
private static DefaultEndpointSelector CreateSelector()
{
return new DefaultEndpointSelector();
}
}
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