    'use strict'
describe('expensesDataService', function(){

	beforeEach(module('app'));

	it('should return three expense items', inject(function(expensesDataService){
		expect(expensesDataService.getExpenses().length).toBe(3);
	}));
});


    'use strict'
describe('expensesDataService', function(){

	beforeEach(module('app'));

	it('should return three expense items', inject(function(expensesDataService){
		expect(expensesDataService.getExpenses().length).toBe(3);
	}));

	it('should return a taxi expense', inject(function(expensesDataService){
		var expenseItems = expensesDataService.getExpenses();
		var testExpenseItem = new ExpenseItem('Taxi','To airport', 89.95);
		expect(expenseItems).toContain(testExpenseItem);
	}))

});


Add test to expenseDataService