116 lines
4.2 KiB
C#
116 lines
4.2 KiB
C#
// Copyright (c) Microsoft Corporation. All rights reserved. See License.txt in the project root for license information.
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using System.Collections.Generic;
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using Moq;
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using Xunit;
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using Assert = Microsoft.TestCommon.AssertEx;
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namespace System.Web.Mvc.Test
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{
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public class ModelBinderProviderCollectionTest
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{
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[Fact]
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public void GuardClause()
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{
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// Arrange
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var collection = new ModelBinderProviderCollection();
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// Act & Assert
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Assert.ThrowsArgumentNull(
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() => collection.GetBinder(null),
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"modelType"
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);
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}
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[Fact]
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public void GetBinderUsesRegisteredProviders()
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{
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// Arrange
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var testType = typeof(string);
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var expectedBinder = new Mock<IModelBinder>().Object;
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var provider = new Mock<IModelBinderProvider>(MockBehavior.Strict);
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provider.Setup(p => p.GetBinder(testType)).Returns(expectedBinder);
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var collection = new ModelBinderProviderCollection(new[] { provider.Object });
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// Act
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IModelBinder returnedBinder = collection.GetBinder(testType);
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// Assert
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Assert.Same(expectedBinder, returnedBinder);
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}
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[Fact]
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public void GetBinderReturnsValueFromFirstSuccessfulBinderProvider()
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{
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// Arrange
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var testType = typeof(string);
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IModelBinder nullModelBinder = null;
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IModelBinder expectedBinder = new Mock<IModelBinder>().Object;
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IModelBinder secondMatchingBinder = new Mock<IModelBinder>().Object;
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var provider1 = new Mock<IModelBinderProvider>();
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provider1.Setup(p => p.GetBinder(testType)).Returns(nullModelBinder);
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var provider2 = new Mock<IModelBinderProvider>(MockBehavior.Strict);
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provider2.Setup(p => p.GetBinder(testType)).Returns(expectedBinder);
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var provider3 = new Mock<IModelBinderProvider>(MockBehavior.Strict);
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provider3.Setup(p => p.GetBinder(testType)).Returns(secondMatchingBinder);
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var collection = new ModelBinderProviderCollection(new[] { provider1.Object, provider2.Object, provider3.Object });
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// Act
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IModelBinder returnedBinder = collection.GetBinder(testType);
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// Assert
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Assert.Same(expectedBinder, returnedBinder);
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}
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[Fact]
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public void GetBinderReturnsNullWhenNoSuccessfulBinderProviders()
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{
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// Arrange
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var testType = typeof(string);
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IModelBinder nullModelBinder = null;
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var provider1 = new Mock<IModelBinderProvider>();
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provider1.Setup(p => p.GetBinder(testType)).Returns(nullModelBinder);
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var provider2 = new Mock<IModelBinderProvider>(MockBehavior.Strict);
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provider2.Setup(p => p.GetBinder(testType)).Returns(nullModelBinder);
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var collection = new ModelBinderProviderCollection(new[] { provider1.Object, provider2.Object });
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// Act
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IModelBinder returnedBinder = collection.GetBinder(testType);
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// Assert
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Assert.Null(returnedBinder);
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}
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[Fact]
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public void GetBinderDelegatesToResolver()
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{
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// Arrange
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Type modelType = typeof(string);
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IModelBinder expectedBinder = new Mock<IModelBinder>().Object;
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Mock<IModelBinderProvider> locatedProvider = new Mock<IModelBinderProvider>();
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locatedProvider.Setup(p => p.GetBinder(modelType))
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.Returns(expectedBinder);
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Mock<IModelBinderProvider> secondProvider = new Mock<IModelBinderProvider>();
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Resolver<IEnumerable<IModelBinderProvider>> resolver = new Resolver<IEnumerable<IModelBinderProvider>> { Current = new IModelBinderProvider[] { locatedProvider.Object, secondProvider.Object } };
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ModelBinderProviderCollection providers = new ModelBinderProviderCollection(resolver);
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// Act
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IModelBinder returnedBinder = providers.GetBinder(modelType);
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// Assert
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Assert.Same(expectedBinder, returnedBinder);
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}
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}
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}
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