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// Copyright (c) Microsoft Corporation. All rights reserved. See License.txt in the project root for license information.
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Collections.Specialized;
using System.Linq;
using Moq;
using Xunit;
using Assert = Microsoft.TestCommon.AssertEx;
namespace System.Web.Mvc.Test
{
public class AcceptVerbsAttributeTest
{
private const string _invalidEnumFormatString = @"The enum '{0}' did not produce the correct array.
Expected: {1}
Actual: {2}";
[Fact]
public void ConstructorThrowsIfVerbsIsEmpty()
{
// Act & Assert
Assert.ThrowsArgumentNullOrEmpty(
delegate { new AcceptVerbsAttribute(new string[0]); }, "verbs");
}
[Fact]
public void ConstructorThrowsIfVerbsIsNull()
{
// Act & Assert
Assert.ThrowsArgumentNullOrEmpty(
delegate { new AcceptVerbsAttribute((string[])null); }, "verbs");
}
[Fact]
public void EnumToArray()
{
// Arrange
IDictionary<string, HttpVerbs> enumValues = EnumToDictionary<HttpVerbs>();
var allCombinations = EnumerableToCombinations(enumValues);
// Act & assert
foreach (var combination in allCombinations)
{
// generate all the names + values in this combination
List<string> aggrNames = new List<string>();
HttpVerbs aggrValues = (HttpVerbs)0;
foreach (var entry in combination)
{
aggrNames.Add(entry.Key);
aggrValues |= entry.Value;
}
// get the resulting array
string[] array = AcceptVerbsAttribute.EnumToArray(aggrValues);
var aggrNamesOrdered = aggrNames.OrderBy(name => name, StringComparer.OrdinalIgnoreCase);
var arrayOrdered = array.OrderBy(name => name, StringComparer.OrdinalIgnoreCase);
bool match = aggrNamesOrdered.SequenceEqual(arrayOrdered, StringComparer.OrdinalIgnoreCase);
if (!match)
{
string message = String.Format(_invalidEnumFormatString, aggrValues,
aggrNames.Aggregate((a, b) => a + ", " + b),
array.Aggregate((a, b) => a + ", " + b));
Assert.True(false, message);
}
}
}
[Fact]
public void IsValidForRequestReturnsFalseIfHttpVerbIsNotInVerbsCollection()
{
// Arrange
AcceptVerbsAttribute attr = new AcceptVerbsAttribute("get", "post");
ControllerContext context = GetControllerContextWithHttpVerb("HEAD");
// Act
bool result = attr.IsValidForRequest(context, null);
// Assert
Assert.False(result);
}
[Fact]
public void IsValidForRequestReturnsTrueIfHttpVerbIsInVerbsCollection()
{
// Arrange
AcceptVerbsAttribute attr = new AcceptVerbsAttribute("get", "post");
ControllerContext context = GetControllerContextWithHttpVerb("POST");
// Act
bool result = attr.IsValidForRequest(context, null);
// Assert
Assert.True(result);
}
[Fact]
public void IsValidForRequestReturnsTrueIfHttpVerbIsOverridden()
{
// Arrange
AcceptVerbsAttribute attr = new AcceptVerbsAttribute("put");
ControllerContext context = GetControllerContextWithHttpVerb("POST", "PUT", null, null);
// Act
bool result = attr.IsValidForRequest(context, null);
// Assert
Assert.True(result);
}
[Fact]
public void IsValidForRequestThrowsIfControllerContextIsNull()
{
// Arrange
AcceptVerbsAttribute attr = new AcceptVerbsAttribute("get", "post");
// Act & Assert
Assert.ThrowsArgumentNull(
delegate { attr.IsValidForRequest(null, null); }, "controllerContext");
}
[Fact]
public void VerbsPropertyFromEnumConstructor()
{
// Arrange
AcceptVerbsAttribute attr = new AcceptVerbsAttribute(HttpVerbs.Get | HttpVerbs.Post);
// Act
ReadOnlyCollection<string> collection = attr.Verbs as ReadOnlyCollection<string>;
// Assert
Assert.NotNull(collection);
Assert.Equal(2, collection.Count);
Assert.Equal("GET", collection[0]);
Assert.Equal("POST", collection[1]);
}
[Fact]
public void VerbsPropertyFromStringArrayConstructor()
{
// Arrange
AcceptVerbsAttribute attr = new AcceptVerbsAttribute("get", "post");
// Act
ReadOnlyCollection<string> collection = attr.Verbs as ReadOnlyCollection<string>;
// Assert
Assert.NotNull(collection);
Assert.Equal(2, collection.Count);
Assert.Equal("get", collection[0]);
Assert.Equal("post", collection[1]);
}
internal static ControllerContext GetControllerContextWithHttpVerb(string httpRequestVerb)
{
return GetControllerContextWithHttpVerb(httpRequestVerb, null, null, null);
}
internal static ControllerContext GetControllerContextWithHttpVerb(string httpRequestVerb, string httpHeaderVerb, string httpFormVerb, string httpQueryStringVerb)
{
Mock<ControllerContext> mockControllerContext = new Mock<ControllerContext>();
mockControllerContext.Setup(c => c.HttpContext.Request.HttpMethod).Returns(httpRequestVerb);
NameValueCollection headers = new NameValueCollection();
if (!String.IsNullOrEmpty(httpHeaderVerb))
{
headers.Add(HttpRequestExtensions.XHttpMethodOverrideKey, httpHeaderVerb);
}
mockControllerContext.Setup(c => c.HttpContext.Request.Headers).Returns(headers);
NameValueCollection form = new NameValueCollection();
if (!String.IsNullOrEmpty(httpFormVerb))
{
form.Add(HttpRequestExtensions.XHttpMethodOverrideKey, httpFormVerb);
}
mockControllerContext.Setup(c => c.HttpContext.Request.Form).Returns(form);
NameValueCollection queryString = new NameValueCollection();
if (!String.IsNullOrEmpty(httpQueryStringVerb))
{
queryString.Add(HttpRequestExtensions.XHttpMethodOverrideKey, httpQueryStringVerb);
}
mockControllerContext.Setup(c => c.HttpContext.Request.QueryString).Returns(queryString);
return mockControllerContext.Object;
}
private static IDictionary<string, TEnum> EnumToDictionary<TEnum>()
{
// Arrange
var values = Enum.GetValues(typeof(TEnum)).Cast<TEnum>();
return values.ToDictionary(value => Enum.GetName(typeof(TEnum), value), value => value);
}
private static IEnumerable<ICollection<T>> EnumerableToCombinations<T>(IEnumerable<T> elements)
{
List<T> allElements = elements.ToList();
int maxCount = 1 << allElements.Count;
for (int idxCombination = 0; idxCombination < maxCount; idxCombination++)
{
List<T> thisCollection = new List<T>();
for (int idxBit = 0; idxBit < 32; idxBit++)
{
bool bitActive = (((uint)idxCombination >> idxBit) & 1) != 0;
if (bitActive)
{
thisCollection.Add(allElements[idxBit]);
}
}
yield return thisCollection;
}
}
}
}
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