public void Build_SomeAdditionalHandlers_PutsTogetherDelegatingHandlers()
{
// Arrange
var builder = new DefaultHttpMessageHandlerBuilder(Services)
{
PrimaryHandler = Mock.Of <HttpMessageHandler>(),
AdditionalHandlers =
{
Mock.Of <DelegatingHandler>(), // Outer
Mock.Of <DelegatingHandler>(), // Middle
}
};
// Act
var handler = builder.Build();
// Assert
Assert.Same(builder.AdditionalHandlers[0], handler);
handler = Assert.IsAssignableFrom <DelegatingHandler>(handler).InnerHandler;
Assert.Same(builder.AdditionalHandlers[1], handler);
handler = Assert.IsAssignableFrom <DelegatingHandler>(handler).InnerHandler;
Assert.Same(builder.PrimaryHandler, handler);
}
public void Ctor_SetsPrimaryHandler()
{
// Arrange & Act
var builder = new DefaultHttpMessageHandlerBuilder(Services);
// Act
Assert.IsType <HttpClientHandler>(builder.PrimaryHandler);
}
public void Build_PrimaryHandlerIsNull_ThrowsException()
{
// Arrange
var builder = new DefaultHttpMessageHandlerBuilder(Services)
{
PrimaryHandler = null,
};
// Act & Assert
var exception = Assert.Throws <InvalidOperationException>(() => builder.Build());
Assert.Equal("The 'PrimaryHandler' must not be null.", exception.Message);
}
public void Build_NoAdditionalHandlers_ReturnsPrimaryHandler()
{
// Arrange
var builder = new DefaultHttpMessageHandlerBuilder(Services)
{
PrimaryHandler = Mock.Of <HttpMessageHandler>(),
};
// Act
var handler = builder.Build();
// Assert
Assert.Same(builder.PrimaryHandler, handler);
}
public void Build_AdditionalHandlerIsNull_ThrowsException()
{
// Arrange
var builder = new DefaultHttpMessageHandlerBuilder(Services)
{
AdditionalHandlers =
{
null,
}
};
// Act & Assert
var exception = Assert.Throws <InvalidOperationException>(() => builder.Build());
Assert.Equal("The 'additionalHandlers' must not contain a null entry.", exception.Message);
}
public void Build_AdditionalHandlerHasNonNullInnerHandler_ThrowsException()
{
// Arrange
var builder = new DefaultHttpMessageHandlerBuilder(Services)
{
AdditionalHandlers =
{
Mock.Of <DelegatingHandler>(h => h.InnerHandler == Mock.Of <DelegatingHandler>()),
}
};
// Act & Assert
var exception = Assert.Throws <InvalidOperationException>(() => builder.Build());
Assert.Equal(
"The 'InnerHandler' property must be null. " +
"'DelegatingHandler' instances provided to 'HttpMessageHandlerBuilder' must not be reused or cached." + Environment.NewLine +
$"Handler: '{builder.AdditionalHandlers[0].ToString()}'",
exception.Message);
}
