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reducer.test.ts
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reducer.test.ts
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import {ActionEnum, ActionEnumValue, TypedAction} from '../src/action-enum';
import {
ReducerEnum,
ReducerEnumValue,
ReducerFunction,
simplePropertyReducer
} from '../src/reducer-enum';
class LayoutAction<T> extends ActionEnumValue<T> {
constructor(name: string) {
super(name);
}
}
class LayoutActionEnumType extends ActionEnum<LayoutAction<any>> {
OPEN_SIDENAV = new LayoutAction<void>('[Layout] Open Sidenav');
OPEN_SIDENAV_ALSO = new LayoutAction<void>('[Layout] Open Sidenav Also');
SET_SIDENAV = new LayoutAction<boolean>('[Layout] Set Sidenav');
constructor() {
super();
this.initEnum('layoutActions');
}
}
const LayoutActionEnum = new LayoutActionEnumType();
interface State {
showSidenav: boolean;
}
const initialState: State = {
showSidenav: false
};
describe('enum version', () => {
class LayoutReducer<T> extends ReducerEnumValue<State, T> {
constructor(
action: ActionEnumValue<T> | ActionEnumValue<T>[],
reduce: ReducerFunction<State, T>
) {
super(action, reduce);
}
}
class LayoutReducerEnumType extends ReducerEnum<LayoutReducer<any>, State> {
// a simple reducer that always sets the same value
// this shows how to respond to multiple actions
// (fall-through in switch)
OPEN_SIDENAV = new LayoutReducer<void>(
[LayoutActionEnum.OPEN_SIDENAV, LayoutActionEnum.OPEN_SIDENAV_ALSO],
(state: State) => ({showSidenav: true})
);
// a reducer that accepts a value and copies it as a property into state
SET_SIDENAV = new LayoutReducer<boolean>(
LayoutActionEnum.SET_SIDENAV,
simplePropertyReducer<State, boolean>('showSidenav')
);
constructor() {
super(initialState);
this.initEnum('layoutReducers');
}
}
const LayoutReducerEnum = new LayoutReducerEnumType();
describe('OPEN_SIDENAV', () => {
it('should set the value', () => {
let state: State = LayoutReducerEnum.OPEN_SIDENAV.reduce(
initialState,
LayoutActionEnum.OPEN_SIDENAV.toAction()
);
expect(state.showSidenav).toBe(true);
});
});
describe('SET_SIDENAV', () => {
it('should set the value', () => {
let state: State = LayoutReducerEnum.SET_SIDENAV.reduce(
initialState,
LayoutActionEnum.SET_SIDENAV.toAction(true)
);
expect(state.showSidenav).toBe(true);
state = LayoutReducerEnum.SET_SIDENAV.reduce(
state,
LayoutActionEnum.SET_SIDENAV.toAction(false)
);
expect(state.showSidenav).toBe(false);
});
});
});
describe('Matches version', () => {
function layoutReducer(
state = initialState,
action: TypedAction<any>
): State {
if (
LayoutActionEnum.matches(
action,
LayoutActionEnum.OPEN_SIDENAV,
LayoutActionEnum.OPEN_SIDENAV_ALSO
)
) {
// a simple reducer that always sets the same value
// this shows how to respond to multiple actions
// (fall-through in switch)
return {...state, showSidenav: true};
} else if (LayoutActionEnum.SET_SIDENAV.matches(action)) {
// a reducer that accepts a value and copies it as a property into state
return simplePropertyReducer<State, boolean>('showSidenav')(
state,
action
);
} else {
return state;
}
}
describe('OPEN_SIDENAV', () => {
it('should set the value', () => {
let state: State = layoutReducer(
initialState,
LayoutActionEnum.OPEN_SIDENAV.toAction()
);
expect(state.showSidenav).toBe(true);
});
});
describe('SET_SIDENAV', () => {
it('should set the value', () => {
let state: State = layoutReducer(
initialState,
LayoutActionEnum.SET_SIDENAV.toAction(true)
);
expect(state.showSidenav).toBe(true);
state = layoutReducer(
state,
LayoutActionEnum.SET_SIDENAV.toAction(false)
);
expect(state.showSidenav).toBe(false);
});
});
});