github.com/insionng/yougam@v0.0.0-20170714101924-2bc18d833463/public/libs/vue-1.0.24/test/unit/specs/cache_spec.js (about)

     1  var Cache = require('src/cache')
     2  
     3  /**
     4   * Debug function to assert cache state
     5   *
     6   * @param {Cache} cache
     7   */
     8  
     9  function toString (cache) {
    10    var s = ''
    11    var entry = cache.head
    12    while (entry) {
    13      s += String(entry.key) + ':' + entry.value
    14      entry = entry.newer
    15      if (entry) {
    16        s += ' < '
    17      }
    18    }
    19    return s
    20  }
    21  
    22  describe('Cache', function () {
    23    var c = new Cache(4)
    24  
    25    it('put', function () {
    26      c.put('adam', 29)
    27      c.put('john', 26)
    28      c.put('angela', 24)
    29      c.put('bob', 48)
    30      expect(c.size).toBe(4)
    31      expect(toString(c)).toBe('adam:29 < john:26 < angela:24 < bob:48')
    32    })
    33  
    34    it('put with same key', function () {
    35      var same = new Cache(4)
    36      same.put('john', 29)
    37      same.put('john', 26)
    38      same.put('john', 24)
    39      same.put('john', 48)
    40      expect(same.size).toBe(1)
    41      expect(toString(same)).toBe('john:48')
    42    })
    43  
    44    it('get', function () {
    45      expect(c.get('adam')).toBe(29)
    46      expect(c.get('john')).toBe(26)
    47      expect(c.get('angela')).toBe(24)
    48      expect(c.get('bob')).toBe(48)
    49      expect(toString(c)).toBe('adam:29 < john:26 < angela:24 < bob:48')
    50  
    51      expect(c.get('angela')).toBe(24)
    52      // angela should now be the tail
    53      expect(toString(c)).toBe('adam:29 < john:26 < bob:48 < angela:24')
    54    })
    55  
    56    it('expire', function () {
    57      c.put('ygwie', 81)
    58      expect(c.size).toBe(4)
    59      expect(toString(c)).toBe('john:26 < bob:48 < angela:24 < ygwie:81')
    60      expect(c.get('adam')).toBeUndefined()
    61    })
    62  
    63    it('shift', function () {
    64      var shift = new Cache(4)
    65      shift.put('adam', 29)
    66      shift.put('john', 26)
    67      shift.put('angela', 24)
    68      shift.put('bob', 48)
    69  
    70      shift.shift()
    71      shift.shift()
    72      shift.shift()
    73      expect(shift.size).toBe(1)
    74      expect(toString(shift)).toBe('bob:48')
    75    })
    76  })