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import {TestBed, async, inject} from '@angular/core/testing';
import {Todo} from './todo';
import {TodoDataService} from './todo-data.service';
describe('TodoDataService', () => {
beforeEach(() => {
TestBed.configureTestingModule({
providers: [TodoDataService]
});
});
it('should ...', inject([TodoDataService], (service: TodoDataService) => {
expect(service).toBeTruthy();
}));
describe('#getAllTodos()', () => {
it('should return an empty array by default', inject([TodoDataService], (service: TodoDataService) => {
expect(service.getAllTodos()).toEqual([]);
}));
it('should return all todos', inject([TodoDataService], (service: TodoDataService) => {
let todo1 = new Todo({title: 'Hello 1', complete: false});
let todo2 = new Todo({title: 'Hello 2', complete: true});
service.addTodo(todo1);
service.addTodo(todo2);
expect(service.getAllTodos()).toEqual([todo1, todo2]);
}));
});
describe('#save(todo)', () => {
it('should automatically assign an incrementing id', inject([TodoDataService], (service: TodoDataService) => {
let todo1 = new Todo({title: 'Hello 1', complete: false});
let todo2 = new Todo({title: 'Hello 2', complete: true});
service.addTodo(todo1);
service.addTodo(todo2);
expect(service.getTodoById(1)).toEqual(todo1);
expect(service.getTodoById(2)).toEqual(todo2);
}));
});
describe('#deleteTodoById(id)', () => {
it('should remove todo with the corresponding id', inject([TodoDataService], (service: TodoDataService) => {
let todo1 = new Todo({title: 'Hello 1', complete: false});
let todo2 = new Todo({title: 'Hello 2', complete: true});
service.addTodo(todo1);
service.addTodo(todo2);
expect(service.getAllTodos()).toEqual([todo1, todo2]);
service.deleteTodoById(1);
expect(service.getAllTodos()).toEqual([todo2]);
service.deleteTodoById(2);
expect(service.getAllTodos()).toEqual([]);
}));
it('should not removing anything if todo with corresponding id is not found', inject([TodoDataService], (service: TodoDataService) => {
let todo1 = new Todo({title: 'Hello 1', complete: false});
let todo2 = new Todo({title: 'Hello 2', complete: true});
service.addTodo(todo1);
service.addTodo(todo2);
expect(service.getAllTodos()).toEqual([todo1, todo2]);
service.deleteTodoById(3);
expect(service.getAllTodos()).toEqual([todo1, todo2]);
}));
});
describe('#updateTodoById(id, values)', () => {
it('should return todo with the corresponding id and updated data', inject([TodoDataService], (service: TodoDataService) => {
let todo = new Todo({title: 'Hello 1', complete: false});
service.addTodo(todo);
let updatedTodo = service.updateTodoById(1, {
title: 'new title'
});
expect(updatedTodo.title).toEqual('new title');
}));
it('should return null if todo is not found', inject([TodoDataService], (service: TodoDataService) => {
let todo = new Todo({title: 'Hello 1', complete: false});
service.addTodo(todo);
let updatedTodo = service.updateTodoById(2, {
title: 'new title'
});
expect(updatedTodo).toEqual(null);
}));
});
describe('#toggleTodoComplete(todo)', () => {
it('should return the updated todo with inverse complete status', inject([TodoDataService], (service: TodoDataService) => {
let todo = new Todo({title: 'Hello 1', complete: false});
service.addTodo(todo);
let updatedTodo = service.toggleTodoComplete(todo);
expect(updatedTodo.complete).toEqual(true);
service.toggleTodoComplete(todo);
expect(updatedTodo.complete).toEqual(false);
}));
});
});
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