public async Task BindModel_NullValueProviderResult_ReturnsNull()
{
// Arrange
var bindingContext = GetBindingContext(typeof(int));
var binder = new SimpleTypeModelBinder();
// Act
var result = await binder.BindModelResultAsync(bindingContext);
// Assert
Assert.Equal(default(ModelBindingResult), result);
Assert.Empty(bindingContext.ModelState);
}
public async Task BindModel_ReturnsNothing_IfTypeCannotBeConverted(Type destinationType)
{
// Arrange
var bindingContext = GetBindingContext(destinationType);
bindingContext.ValueProvider = new SimpleValueProvider
{
{ "theModelName", "some-value" }
};
var binder = new SimpleTypeModelBinder();
// Act
var result = await binder.BindModelResultAsync(bindingContext);
// Assert
Assert.Equal(default(ModelBindingResult), result);
}
public async Task BindModel_ReturnsFailure_IfTypeCanBeConverted_AndConversionFails(Type destinationType)
{
// Arrange
var bindingContext = GetBindingContext(destinationType);
bindingContext.ValueProvider = new SimpleValueProvider
{
{ "theModelName", "some-value" }
};
var binder = new SimpleTypeModelBinder();
// Act
var result = await binder.BindModelResultAsync(bindingContext);
// Assert
Assert.NotEqual(default(ModelBindingResult), result);
Assert.False(result.IsModelSet);
}
public async Task BindModel_ValidValueProviderResult_ConvertEmptyStringsToNull()
{
// Arrange
var bindingContext = GetBindingContext(typeof(string));
bindingContext.ValueProvider = new SimpleValueProvider
{
{ "theModelName", string.Empty }
};
var binder = new SimpleTypeModelBinder();
// Act
var result = await binder.BindModelResultAsync(bindingContext);
// Assert
Assert.Null(result.Model);
Assert.True(bindingContext.ModelState.ContainsKey("theModelName"));
}
public async Task BindModel_ValidValueProviderResult_ReturnsModel()
{
// Arrange
var bindingContext = GetBindingContext(typeof(int));
bindingContext.ValueProvider = new SimpleValueProvider
{
{ "theModelName", "42" }
};
var binder = new SimpleTypeModelBinder();
// Act
var result = await binder.BindModelResultAsync(bindingContext);
// Assert
Assert.True(result.IsModelSet);
Assert.Equal(42, result.Model);
Assert.True(bindingContext.ModelState.ContainsKey("theModelName"));
}
public async Task BindModel_BindsFlagsEnumModels(string flagsEnumValue, int expected)
{
// Arrange
var bindingContext = GetBindingContext(typeof(FlagsEnum));
bindingContext.ValueProvider = new SimpleValueProvider
{
{ "theModelName", flagsEnumValue }
};
var binder = new SimpleTypeModelBinder();
// Act
var result = await binder.BindModelResultAsync(bindingContext);
// Assert
Assert.True(result.IsModelSet);
var boundModel = Assert.IsType <FlagsEnum>(result.Model);
Assert.Equal((FlagsEnum)expected, boundModel);
}
public async Task BindModel_CreatesError_WhenTypeConversionIsNull(Type destinationType)
{
// Arrange
var bindingContext = GetBindingContext(destinationType);
bindingContext.ValueProvider = new SimpleValueProvider
{
{ "theModelName", string.Empty }
};
var binder = new SimpleTypeModelBinder();
// Act
var result = await binder.BindModelResultAsync(bindingContext);
// Assert
Assert.False(result.IsModelSet);
Assert.Null(result.Model);
var error = Assert.Single(bindingContext.ModelState["theModelName"].Errors);
Assert.Equal("The value '' is invalid.", error.ErrorMessage, StringComparer.Ordinal);
Assert.Null(error.Exception);
}
public async Task BindModel_Error_FormatExceptionsTurnedIntoStringsInModelState()
{
// Arrange
var message = "The value 'not an integer' is not valid for Int32.";
var bindingContext = GetBindingContext(typeof(int));
bindingContext.ValueProvider = new SimpleValueProvider
{
{ "theModelName", "not an integer" }
};
var binder = new SimpleTypeModelBinder();
// Act
var result = await binder.BindModelResultAsync(bindingContext);
// Assert
Assert.NotEqual(default(ModelBindingResult), result);
Assert.Null(result.Model);
Assert.False(bindingContext.ModelState.IsValid);
var error = Assert.Single(bindingContext.ModelState["theModelName"].Errors);
Assert.Equal(message, error.ErrorMessage);
}