Struct cqrs_es2::HandlerTester

pub struct HandlerTester<C: ICommand, E: IEvent, A: Default + ICommandHandler<C, E> + IEventHandler<E>> { /* fields omitted */ }

HandlerTester provides a consistent way to test aggregate implementations

Examples

use cqrs_es2::{
    example_impl::{
        AddCustomerName,
        Customer,
        CustomerCommand,
        CustomerEvent,
        NameAdded,
    },
    HandlerTester,
};

type CustomTester =
    HandlerTester<CustomerCommand, CustomerEvent, Customer>;

CustomTester::default()
    .given_no_previous_events()
    .when(CustomerCommand::AddCustomerName(
        AddCustomerName {
            changed_name: "John Doe".to_string(),
        },
    ))
    .then_expect(vec![CustomerEvent::NameAdded(
        NameAdded {
            changed_name: "John Doe".to_string(),
        },
    )]);

CustomTester::default()
    .given(vec![CustomerEvent::NameAdded(
        NameAdded {
            changed_name: "John Doe".to_string(),
        },
    )])
    .when(CustomerCommand::AddCustomerName(
        AddCustomerName {
            changed_name: "John Doe".to_string(),
        },
    ))
    .then_expect_error(
        "a name has already been added for this customer",
    )

Implementations

impl<C: ICommand, E: IEvent, A: Default + ICommandHandler<C, E> + IEventHandler<E>> HandlerTester<C, E, A>

pub fn given_no_previous_events(&self) -> HandlerResultExecutor<C, E, A>

Initiates a handler test with no previous events

pub fn given(&self, events: Vec<E>) -> HandlerResultExecutor<C, E, A>

Initiates a handler test with a collection of previous events

Trait Implementations

impl<C: ICommand, E: IEvent, A: Default + ICommandHandler<C, E> + IEventHandler<E>> Default for HandlerTester<C, E, A>

fn default() -> Self

Returns the “default value” for a type.