Testing a provider with a private method. See the use of provide injector "withPrivateProvider."

angularjs provider with private method test example

angular.module('widget', []).
	provider('withPrivate', [function(){
		var query = 'First';
		this.demo = 'Third';
		this.setQuery = function(newQuery){
			query = newQuery;
		};
		this.$get = [function(){
			return {
				getQuery: function(){
					return query;
				}
			};
		}];
	}]);

describe('Widget: withPrivate', function(){
	"use strict";
	var p;
	beforeEach(module('widget', function(withPrivateProvider){
		p = withPrivateProvider;
	}));
	it('Var query, default value', inject(function(withPrivate){
		// Default value
		expect(withPrivate.getQuery()).toBe('First');
	}));
	it('Member demo, private', inject(function(withPrivate){
		expect(p.demo).toBe('Third');
	}));
	it('Method setQuery, private', inject(function(withPrivate){
		var val = 'Second';
		p.setQuery(val);
		expect(withPrivate.getQuery()).toBe(val);
	}));
});