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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.AspNetCore.Routing.Constraints;
using Microsoft.AspNetCore.Routing.TestObjects;
using Microsoft.AspNetCore.Testing;
using Microsoft.Extensions.Options;
using Moq;
namespace Microsoft.AspNetCore.Routing;
public class RouteConstraintBuilderTest
{
[Fact]
public void AddConstraint_String_CreatesARegex()
{
// Arrange
var builder = CreateBuilder("{controller}/{action}");
builder.AddConstraint("controller", "abc");
// Act
var result = builder.Build();
// Assert
Assert.Equal(1, result.Count);
Assert.Equal("controller", result.First().Key);
Assert.IsType<RegexRouteConstraint>(Assert.Single(result).Value);
}
[Fact]
public void AddConstraint_IRouteConstraint()
{
// Arrange
var originalConstraint = Mock.Of<IRouteConstraint>();
var builder = CreateBuilder("{controller}/{action}");
builder.AddConstraint("controller", originalConstraint);
// Act
var result = builder.Build();
// Assert
Assert.Equal(1, result.Count);
var kvp = Assert.Single(result);
Assert.Equal("controller", kvp.Key);
Assert.Same(originalConstraint, kvp.Value);
}
[Fact]
public void AddResolvedConstraint_IRouteConstraint()
{
// Arrange
var builder = CreateBuilder("{controller}/{action}");
builder.AddResolvedConstraint("controller", "int");
// Act
var result = builder.Build();
// Assert
Assert.Equal(1, result.Count);
var kvp = Assert.Single(result);
Assert.Equal("controller", kvp.Key);
Assert.IsType<IntRouteConstraint>(kvp.Value);
}
[Fact]
public void AddConstraint_InvalidType_Throws()
{
// Arrange
var builder = CreateBuilder("{controller}/{action}");
// Act & Assert
ExceptionAssert.Throws<RouteCreationException>(
() => builder.AddConstraint("controller", 5),
"The constraint entry 'controller' - '5' on the route " +
"'{controller}/{action}' must have a string value or be of a type which implements '" +
typeof(IRouteConstraint) + "'.");
}
[Fact]
public void AddResolvedConstraint_NotFound_Throws()
{
// Arrange
var unresolvedConstraint = @"test";
var builder = CreateBuilder("{controller}/{action}");
// Act & Assert
ExceptionAssert.Throws<InvalidOperationException>(
() => builder.AddResolvedConstraint("controller", unresolvedConstraint),
@"The constraint entry 'controller' - '" + unresolvedConstraint + "' on the route " +
"'{controller}/{action}' could not be resolved by the constraint resolver " +
"of type 'DefaultInlineConstraintResolver'.");
}
[Fact]
public void AddResolvedConstraint_ForOptionalParameter()
{
var builder = CreateBuilder("{controller}/{action}/{id}");
builder.SetOptional("id");
builder.AddResolvedConstraint("id", "int");
var result = builder.Build();
Assert.Equal(1, result.Count);
Assert.Equal("id", result.First().Key);
Assert.IsType<OptionalRouteConstraint>(Assert.Single(result).Value);
}
[Fact]
public void AddResolvedConstraint_SetOptionalParameter_AfterAddingTheParameter()
{
var builder = CreateBuilder("{controller}/{action}/{id}");
builder.AddResolvedConstraint("id", "int");
builder.SetOptional("id");
var result = builder.Build();
Assert.Equal(1, result.Count);
Assert.Equal("id", result.First().Key);
Assert.IsType<OptionalRouteConstraint>(Assert.Single(result).Value);
}
[Fact]
public void AddResolvedConstraint_And_AddConstraint_ForOptionalParameter()
{
var builder = CreateBuilder("{controller}/{action}/{name}");
builder.SetOptional("name");
builder.AddResolvedConstraint("name", "alpha");
var minLenConstraint = new MinLengthRouteConstraint(10);
builder.AddConstraint("name", minLenConstraint);
var result = builder.Build();
Assert.Equal(1, result.Count);
Assert.Equal("name", result.First().Key);
Assert.IsType<OptionalRouteConstraint>(Assert.Single(result).Value);
var optionalConstraint = (OptionalRouteConstraint)result.First().Value;
var compositeConstraint = Assert.IsType<CompositeRouteConstraint>(optionalConstraint.InnerConstraint); ;
Assert.Equal(2, compositeConstraint.Constraints.Count());
Assert.Single(compositeConstraint.Constraints, c => c is MinLengthRouteConstraint);
Assert.Single(compositeConstraint.Constraints, c => c is AlphaRouteConstraint);
}
[Theory]
[InlineData("abc", "abc", true)] // simple case
[InlineData("abc", "bbb|abc", true)] // Regex or
[InlineData("Abc", "abc", true)] // Case insensitive
[InlineData("Abc ", "abc", false)] // Matches whole (but no trimming)
[InlineData("Abcd", "abc", false)] // Matches whole (additional non whitespace char)
[InlineData("Abc", " abc", false)] // Matches whole (less one char)
public void StringConstraintsMatchingScenarios(string routeValue,
string constraintValue,
bool shouldMatch)
{
// Arrange
var routeValues = new RouteValueDictionary(new { controller = routeValue });
var builder = CreateBuilder("{controller}/{action}");
builder.AddConstraint("controller", constraintValue);
var constraint = Assert.Single(builder.Build()).Value;
Assert.Equal(shouldMatch,
constraint.Match(
httpContext: new Mock<HttpContext>().Object,
route: new Mock<IRouter>().Object,
routeKey: "controller",
values: routeValues,
routeDirection: RouteDirection.IncomingRequest));
}
private static RouteConstraintBuilder CreateBuilder(string template)
{
var options = new Mock<IOptions<RouteOptions>>(MockBehavior.Strict);
options
.SetupGet(o => o.Value)
.Returns(new RouteOptions());
var inlineConstraintResolver = new DefaultInlineConstraintResolver(options.Object, new TestServiceProvider());
return new RouteConstraintBuilder(inlineConstraintResolver, template);
}
}
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