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cacheFactorySpec.js
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322 lines (234 loc) · 9.31 KB
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describe('$cacheFactory', function() {
it('should be injected', inject(function($cacheFactory) {
expect($cacheFactory).toBeDefined();
}));
it('should return a new cache whenever called', inject(function($cacheFactory) {
var cache1 = $cacheFactory('cache1');
var cache2 = $cacheFactory('cache2');
expect(cache1).not.toEqual(cache2);
}));
it('should complain if the cache id is being reused', inject(function($cacheFactory) {
$cacheFactory('cache1');
expect(function() { $cacheFactory('cache1'); }).
toThrow('cacheId cache1 taken');
}));
describe('info', function() {
it('should provide info about all created caches', inject(function($cacheFactory) {
expect($cacheFactory.info()).toEqual({});
var cache1 = $cacheFactory('cache1');
expect($cacheFactory.info()).toEqual({cache1: {id: 'cache1', size: 0}});
cache1.put('foo', 'bar');
expect($cacheFactory.info()).toEqual({cache1: {id: 'cache1', size: 1}});
}));
});
describe('get', function() {
it('should return a cache if looked up by id', inject(function($cacheFactory) {
var cache1 = $cacheFactory('cache1'),
cache2 = $cacheFactory('cache2');
expect(cache1).not.toBe(cache2);
expect(cache1).toBe($cacheFactory.get('cache1'));
expect(cache2).toBe($cacheFactory.get('cache2'));
}));
});
describe('cache', function() {
var cache;
beforeEach(inject(function($cacheFactory) {
cache = $cacheFactory('test');
}));
describe('put, get & remove', function() {
it('should add cache entries via add and retrieve them via get', inject(function($cacheFactory) {
cache.put('key1', 'bar');
cache.put('key2', {bar:'baz'});
expect(cache.get('key2')).toEqual({bar:'baz'});
expect(cache.get('key1')).toBe('bar');
}));
it('should ignore put if the value is undefined', inject(function($cacheFactory) {
cache.put();
cache.put('key1');
cache.put('key2', undefined);
expect(cache.info().size).toBe(0);
}));
it('should remove entries via remove', inject(function($cacheFactory) {
cache.put('k1', 'foo');
cache.put('k2', 'bar');
cache.remove('k2');
expect(cache.get('k1')).toBe('foo');
expect(cache.get('k2')).toBeUndefined();
cache.remove('k1');
expect(cache.get('k1')).toBeUndefined();
expect(cache.get('k2')).toBeUndefined();
}));
it('should return undefined when entry does not exist', inject(function($cacheFactory) {
expect(cache.remove('non-existent')).toBeUndefined();
}));
it('should stringify keys', inject(function($cacheFactory) {
cache.put('123', 'foo');
cache.put(123, 'bar');
expect(cache.get('123')).toBe('bar');
expect(cache.info().size).toBe(1);
cache.remove(123);
expect(cache.info().size).toBe(0);
}));
});
describe('info', function() {
it('should size increment with put and decrement with remove', inject(function($cacheFactory) {
expect(cache.info().size).toBe(0);
cache.put('foo', 'bar');
expect(cache.info().size).toBe(1);
cache.put('baz', 'boo');
expect(cache.info().size).toBe(2);
cache.remove('baz');
expect(cache.info().size).toBe(1);
cache.remove('foo');
expect(cache.info().size).toBe(0);
}));
it('should return cache id', inject(function($cacheFactory) {
expect(cache.info().id).toBe('test');
}));
});
describe('removeAll', function() {
it('should blow away all data', inject(function($cacheFactory) {
cache.put('id1', 1);
cache.put('id2', 2);
cache.put('id3', 3);
expect(cache.info().size).toBe(3);
cache.removeAll();
expect(cache.info().size).toBe(0);
expect(cache.get('id1')).toBeUndefined();
expect(cache.get('id2')).toBeUndefined();
expect(cache.get('id3')).toBeUndefined();
}));
});
describe('destroy', function() {
it('should make the cache unusable and remove references to it from $cacheFactory', inject(function($cacheFactory) {
cache.put('foo', 'bar');
cache.destroy();
expect(function() { cache.get('foo'); } ).toThrow();
expect(function() { cache.get('neverexisted'); }).toThrow();
expect(function() { cache.put('foo', 'bar'); }).toThrow();
expect($cacheFactory.get('test')).toBeUndefined();
expect($cacheFactory.info()).toEqual({});
}));
});
});
describe('LRU cache', function() {
it('should create cache with defined capacity', inject(function($cacheFactory) {
cache = $cacheFactory('cache1', {capacity: 5});
expect(cache.info().size).toBe(0);
for (var i=0; i<5; i++) {
cache.put('id' + i, i);
}
expect(cache.info().size).toBe(5);
cache.put('id5', 5);
expect(cache.info().size).toBe(5);
cache.put('id6', 6);
expect(cache.info().size).toBe(5);
}));
describe('eviction', function() {
beforeEach(inject(function($cacheFactory) {
cache = $cacheFactory('cache1', {capacity: 2});
cache.put('id0', 0);
cache.put('id1', 1);
}));
it('should kick out the first entry on put', inject(function($cacheFactory) {
cache.put('id2', 2);
expect(cache.get('id0')).toBeUndefined();
expect(cache.get('id1')).toBe(1);
expect(cache.get('id2')).toBe(2);
}));
it('should refresh an entry via get', inject(function($cacheFactory) {
cache.get('id0');
cache.put('id2', 2);
expect(cache.get('id0')).toBe(0);
expect(cache.get('id1')).toBeUndefined();
expect(cache.get('id2')).toBe(2);
}));
it('should refresh an entry via put', inject(function($cacheFactory) {
cache.put('id0', '00');
cache.put('id2', 2);
expect(cache.get('id0')).toBe('00');
expect(cache.get('id1')).toBeUndefined();
expect(cache.get('id2')).toBe(2);
}));
it('should not purge an entry if another one was removed', inject(function($cacheFactory) {
cache.remove('id1');
cache.put('id2', 2);
expect(cache.get('id0')).toBe(0);
expect(cache.get('id1')).toBeUndefined();
expect(cache.get('id2')).toBe(2);
}));
it('should purge the next entry if the stalest one was removed', inject(function($cacheFactory) {
cache.remove('id0');
cache.put('id2', 2);
cache.put('id3', 3);
expect(cache.get('id0')).toBeUndefined();
expect(cache.get('id1')).toBeUndefined();
expect(cache.get('id2')).toBe(2);
expect(cache.get('id3')).toBe(3);
}));
it('should correctly recreate the linked list if all cache entries were removed', inject(function($cacheFactory) {
cache.remove('id0');
cache.remove('id1');
cache.put('id2', 2);
cache.put('id3', 3);
cache.put('id4', 4);
expect(cache.get('id0')).toBeUndefined();
expect(cache.get('id1')).toBeUndefined();
expect(cache.get('id2')).toBeUndefined();
expect(cache.get('id3')).toBe(3);
expect(cache.get('id4')).toBe(4);
}));
it('should blow away the entire cache via removeAll and start evicting when full', inject(function($cacheFactory) {
cache.put('id0', 0);
cache.put('id1', 1);
cache.removeAll();
cache.put('id2', 2);
cache.put('id3', 3);
cache.put('id4', 4);
expect(cache.info().size).toBe(2);
expect(cache.get('id0')).toBeUndefined();
expect(cache.get('id1')).toBeUndefined();
expect(cache.get('id2')).toBeUndefined();
expect(cache.get('id3')).toBe(3);
expect(cache.get('id4')).toBe(4);
}));
it('should correctly refresh and evict items if operations are chained', inject(function($cacheFactory) {
cache = $cacheFactory('cache2', {capacity: 3});
cache.put('id0', 0); //0
cache.put('id1', 1); //1,0
cache.put('id2', 2); //2,1,0
cache.get('id0'); //0,2,1
cache.put('id3', 3); //3,0,2
cache.put('id0', 9); //0,3,2
cache.put('id4', 4); //4,0,3
expect(cache.get('id3')).toBe(3);
expect(cache.get('id0')).toBe(9);
expect(cache.get('id4')).toBe(4);
cache.remove('id0'); //4,3
cache.remove('id3'); //4
cache.put('id5', 5); //5,4
cache.put('id6', 6); //6,5,4
cache.get('id4'); //4,6,5
cache.put('id7', 7); //7,4,6
expect(cache.get('id0')).toBeUndefined();
expect(cache.get('id1')).toBeUndefined();
expect(cache.get('id2')).toBeUndefined();
expect(cache.get('id3')).toBeUndefined();
expect(cache.get('id4')).toBe(4);
expect(cache.get('id5')).toBeUndefined();
expect(cache.get('id6')).toBe(6);
expect(cache.get('id7')).toBe(7);
cache.removeAll();
cache.put('id0', 0); //0
cache.put('id1', 1); //1,0
cache.put('id2', 2); //2,1,0
cache.put('id3', 3); //3,2,1
expect(cache.info().size).toBe(3);
expect(cache.get('id0')).toBeUndefined();
expect(cache.get('id1')).toBe(1);
expect(cache.get('id2')).toBe(2);
expect(cache.get('id3')).toBe(3);
}));
});
});
});