public void CreateBinder_Caches_NonRootNodes_WhenNonRootNodeReturnsNull()
{
// Arrange
var metadataProvider = new TestModelMetadataProvider();
var options = Options.Create(new MvcOptions());
IModelBinder inner = null;
var widgetProvider = new TestModelBinderProvider(c =>
{
if (c.Metadata.ModelType == typeof(Widget))
{
var binder = c.CreateBinder(c.Metadata.Properties[nameof(Widget.Id)]);
Assert.IsType <NoOpBinder>(binder);
if (inner == null)
{
inner = binder;
}
else
{
Assert.Same(inner, binder);
}
return(Mock.Of <IModelBinder>());
}
return(null);
});
var widgetIdProvider = new TestModelBinderProvider(c =>
{
Assert.Equal(typeof(WidgetId), c.Metadata.ModelType);
return(null);
});
options.Value.ModelBinderProviders.Add(widgetProvider);
options.Value.ModelBinderProviders.Add(widgetIdProvider);
var factory = new ModelBinderFactory(
metadataProvider,
options,
GetServices());
var context = new ModelBinderFactoryContext()
{
Metadata = metadataProvider.GetMetadataForType(typeof(Widget)),
CacheToken = null, // We want the outermost provider to run twice.
};
// Act
var result1 = factory.CreateBinder(context);
var result2 = factory.CreateBinder(context);
// Assert
Assert.NotSame(result1, result2);
Assert.Equal(2, widgetProvider.SuccessCount);
Assert.Equal(0, widgetIdProvider.SuccessCount);
}
public void CreateBinder_Caches_WhenTokenIsNotNull()
{
// Arrange
var metadataProvider = new TestModelMetadataProvider();
var options = new TestOptionsManager <MvcOptions>();
options.Value.ModelBinderProviders.Add(new TestModelBinderProvider(c =>
{
Assert.Equal(typeof(Employee), c.Metadata.ModelType);
return(Mock.Of <IModelBinder>());
}));
var factory = new ModelBinderFactory(metadataProvider, options);
var context = new ModelBinderFactoryContext()
{
Metadata = metadataProvider.GetMetadataForType(typeof(Employee)),
CacheToken = new object(),
};
// Act
var result1 = factory.CreateBinder(context);
var result2 = factory.CreateBinder(context);
// Assert
Assert.Same(result1, result2);
}
public void CreateBinder_DoesNotCache_WhenTokenIsNull()
{
// Arrange
var metadataProvider = new TestModelMetadataProvider();
var options = Options.Create(new MvcOptions());
options.Value.ModelBinderProviders.Add(new TestModelBinderProvider(c =>
{
Assert.Equal(typeof(Employee), c.Metadata.ModelType);
return(Mock.Of <IModelBinder>());
}));
var factory = new ModelBinderFactory(
metadataProvider,
options,
GetServices());
var context = new ModelBinderFactoryContext()
{
Metadata = metadataProvider.GetMetadataForType(typeof(Employee)),
};
// Act
var result1 = factory.CreateBinder(context);
var result2 = factory.CreateBinder(context);
// Assert
Assert.NotSame(result1, result2);
}
public void CreateBinder_Caches_NonRootNodes_FixesUpPlaceholderBinder()
{
// Arrange
var metadataProvider = new TestModelMetadataProvider();
var options = new TestOptionsManager <MvcOptions>();
IModelBinder inner = null;
IModelBinder innerInner = null;
var widgetProvider = new TestModelBinderProvider(c =>
{
if (c.Metadata.ModelType == typeof(Widget))
{
inner = c.CreateBinder(c.Metadata.Properties[nameof(Widget.Id)]);
return(Mock.Of <IModelBinder>());
}
return(null);
});
var widgetIdProvider = new TestModelBinderProvider(c =>
{
Assert.Equal(typeof(WidgetId), c.Metadata.ModelType);
innerInner = c.CreateBinder(c.Metadata);
return(null);
});
options.Value.ModelBinderProviders.Add(widgetProvider);
options.Value.ModelBinderProviders.Add(widgetIdProvider);
var factory = new ModelBinderFactory(metadataProvider, options);
var context = new ModelBinderFactoryContext()
{
Metadata = metadataProvider.GetMetadataForType(typeof(Widget)),
CacheToken = null,
};
// Act 1
var result1 = factory.CreateBinder(context);
context.Metadata = context.Metadata.Properties[nameof(Widget.Id)];
context.CacheToken = context.Metadata;
// Act 2
var result2 = factory.CreateBinder(context);
// Assert
Assert.Same(inner, result2);
Assert.NotSame(inner, innerInner);
var placeholder = Assert.IsType <PlaceholderBinder>(innerInner);
Assert.IsType <NoOpBinder>(placeholder.Inner);
Assert.Equal(1, widgetProvider.SuccessCount);
Assert.Equal(0, widgetIdProvider.SuccessCount);
}
public void CreateBinder_Caches_NonRootNodes_UsesModelMetadataAsToken()
{
// Arrange
var metadataProvider = new TestModelMetadataProvider();
var options = Options.Create(new MvcOptions());
IModelBinder inner = null;
var widgetProvider = new TestModelBinderProvider(c =>
{
if (c.Metadata.ModelType == typeof(Widget))
{
inner = c.CreateBinder(c.Metadata.Properties[nameof(Widget.Id)]);
return(Mock.Of <IModelBinder>());
}
return(null);
});
var widgetIdProvider = new TestModelBinderProvider(c =>
{
Assert.Equal(typeof(WidgetId), c.Metadata.ModelType);
return(Mock.Of <IModelBinder>());
});
options.Value.ModelBinderProviders.Add(widgetProvider);
options.Value.ModelBinderProviders.Add(widgetIdProvider);
var factory = new ModelBinderFactory(
metadataProvider,
options,
GetServices());
var context = new ModelBinderFactoryContext()
{
Metadata = metadataProvider.GetMetadataForType(typeof(Widget)),
CacheToken = null,
};
// Act 1
var result1 = factory.CreateBinder(context);
context.Metadata = context.Metadata.Properties[nameof(Widget.Id)];
context.CacheToken = context.Metadata;
// Act 2
var result2 = factory.CreateBinder(context);
// Assert
Assert.Same(inner, result2);
Assert.Equal(1, widgetProvider.SuccessCount);
Assert.Equal(1, widgetIdProvider.SuccessCount);
}
public void CreateBinder_CreatesNoOpBinder_WhenPropertyDoesntHaveABinder()
{
// Arrange
var metadataProvider = new TestModelMetadataProvider();
// There isn't a provider that can handle WidgetId.
var options = new TestOptionsManager <MvcOptions>();
options.Value.ModelBinderProviders.Add(new TestModelBinderProvider(c =>
{
if (c.Metadata.ModelType == typeof(Widget))
{
Assert.NotNull(c.CreateBinder(c.Metadata.Properties[nameof(Widget.Id)]));
return(Mock.Of <IModelBinder>());
}
return(null);
}));
var factory = new ModelBinderFactory(metadataProvider, options);
var context = new ModelBinderFactoryContext()
{
Metadata = metadataProvider.GetMetadataForType(typeof(Widget)),
};
// Act
var result = factory.CreateBinder(context);
// Assert
Assert.NotNull(result);
}
public void CreateBinder_NestedProperties()
{
// Arrange
var metadataProvider = new TestModelMetadataProvider();
var options = Options.Create(new MvcOptions());
options.Value.ModelBinderProviders.Add(new TestModelBinderProvider(c =>
{
if (c.Metadata.ModelType == typeof(Widget))
{
Assert.NotNull(c.CreateBinder(c.Metadata.Properties[nameof(Widget.Id)]));
return(Mock.Of <IModelBinder>());
}
else if (c.Metadata.ModelType == typeof(WidgetId))
{
return(Mock.Of <IModelBinder>());
}
return(null);
}));
var factory = new ModelBinderFactory(metadataProvider, options);
var context = new ModelBinderFactoryContext()
{
Metadata = metadataProvider.GetMetadataForType(typeof(Widget)),
};
// Act
var result = factory.CreateBinder(context);
// Assert
Assert.NotNull(result);
}
public void CreateBinder_PassesExpectedBindingInfo(
BindingInfo parameterBindingInfo,
BindingMetadata bindingMetadata,
BindingInfo expectedInfo)
{
// Arrange
var metadataProvider = new TestModelMetadataProvider();
metadataProvider.ForType <Employee>().BindingDetails(binding =>
{
binding.BinderModelName = bindingMetadata.BinderModelName;
binding.BinderType = bindingMetadata.BinderType;
binding.BindingSource = bindingMetadata.BindingSource;
if (bindingMetadata.PropertyFilterProvider != null)
{
binding.PropertyFilterProvider = bindingMetadata.PropertyFilterProvider;
}
});
var modelBinder = Mock.Of <IModelBinder>();
var modelBinderProvider = new TestModelBinderProvider(context =>
{
Assert.Equal(typeof(Employee), context.Metadata.ModelType);
Assert.NotNull(context.BindingInfo);
Assert.Equal(expectedInfo.BinderModelName, context.BindingInfo.BinderModelName, StringComparer.Ordinal);
Assert.Equal(expectedInfo.BinderType, context.BindingInfo.BinderType);
Assert.Equal(expectedInfo.BindingSource, context.BindingInfo.BindingSource);
Assert.Same(expectedInfo.PropertyFilterProvider, context.BindingInfo.PropertyFilterProvider);
return(modelBinder);
});
var options = Options.Create(new MvcOptions());
options.Value.ModelBinderProviders.Insert(0, modelBinderProvider);
var factory = new ModelBinderFactory(
metadataProvider,
options,
GetServices());
var factoryContext = new ModelBinderFactoryContext
{
BindingInfo = parameterBindingInfo,
Metadata = metadataProvider.GetMetadataForType(typeof(Employee)),
};
// Act & Assert
var result = factory.CreateBinder(factoryContext);
// Confirm our IModelBinderProvider was called.
Assert.Same(modelBinder, result);
}
public void CreateBinder_Throws_WhenNoProviders()
{
// Arrange
var expected = $"'{typeof(MvcOptions).FullName}.{nameof(MvcOptions.ModelBinderProviders)}' must not be " +
$"empty. At least one '{typeof(IModelBinderProvider).FullName}' is required to model bind.";
var metadataProvider = new TestModelMetadataProvider();
var options = Options.Create(new MvcOptions());
var factory = new ModelBinderFactory(metadataProvider, options);
var context = new ModelBinderFactoryContext()
{
Metadata = metadataProvider.GetMetadataForType(typeof(string)),
};
// Act & Assert
var exception = Assert.Throws <InvalidOperationException>(() => factory.CreateBinder(context));
Assert.Equal(expected, exception.Message);
}
public void CreateBinder_Throws_WhenBinderNotCreated()
{
// Arrange
var metadataProvider = new TestModelMetadataProvider();
var options = new TestOptionsManager <MvcOptions>();
var factory = new ModelBinderFactory(metadataProvider, options);
var context = new ModelBinderFactoryContext()
{
Metadata = metadataProvider.GetMetadataForType(typeof(string)),
};
// Act
var exception = Assert.Throws <InvalidOperationException>(() => factory.CreateBinder(context));
// Assert
Assert.Equal(
$"Could not create a model binder for model object of type '{typeof(string).FullName}'.",
exception.Message);
}
public void CreateBinder_CreatesNoOpBinder_WhenPropertyBindingIsNotAllowed()
{
// Arrange
var metadataProvider = new TestModelMetadataProvider();
metadataProvider
.ForProperty <Widget>(nameof(Widget.Id))
.BindingDetails(m => m.IsBindingAllowed = false);
var modelBinder = new ByteArrayModelBinder(NullLoggerFactory.Instance);
var options = Options.Create(new MvcOptions());
options.Value.ModelBinderProviders.Add(new TestModelBinderProvider(c =>
{
if (c.Metadata.ModelType == typeof(WidgetId))
{
return(modelBinder);
}
return(null);
}));
var factory = new ModelBinderFactory(
metadataProvider,
options,
GetServices());
var context = new ModelBinderFactoryContext()
{
Metadata = metadataProvider.GetMetadataForProperty(typeof(Widget), nameof(Widget.Id)),
};
// Act
var result = factory.CreateBinder(context);
// Assert
Assert.NotNull(result);
Assert.IsType <NoOpBinder>(result);
}
public void CreateBinder_BreaksCycles()
{
// Arrange
var metadataProvider = new TestModelMetadataProvider();
var callCount = 0;
var options = Options.Create(new MvcOptions());
options.Value.ModelBinderProviders.Add(new TestModelBinderProvider(c =>
{
var currentCallCount = ++callCount;
Assert.Equal(typeof(Employee), c.Metadata.ModelType);
var binder = c.CreateBinder(c.Metadata.Properties[nameof(Employee.Manager)]);
if (currentCallCount == 2)
{
Assert.IsType <PlaceholderBinder>(binder);
}
return(Mock.Of <IModelBinder>());
}));
var factory = new ModelBinderFactory(
metadataProvider,
options,
GetServices());
var context = new ModelBinderFactoryContext()
{
Metadata = metadataProvider.GetMetadataForType(typeof(Employee)),
};
// Act
var result = factory.CreateBinder(context);
// Assert
Assert.NotNull(result);
}
public void CreateBinder_Throws_WhenBinderNotCreated()
{
// Arrange
var metadataProvider = new TestModelMetadataProvider();
var options = Options.Create(new MvcOptions());
options.Value.ModelBinderProviders.Add(new TestModelBinderProvider(_ => null));
var factory = new ModelBinderFactory(
metadataProvider,
options,
GetServices());
var context = new ModelBinderFactoryContext()
{
Metadata = metadataProvider.GetMetadataForType(typeof(string)),
};
// Act & Assert
var exception = Assert.Throws <InvalidOperationException>(() => factory.CreateBinder(context));
Assert.Equal(
$"Could not create a model binder for model object of type '{typeof(string).FullName}'.",
exception.Message);
}