github.com/TugasAkhir-QUIC/quic-go@v0.0.2-0.20240215011318-d20e25a9054c/token_store_test.go (about)

     1  package quic
     2  
     3  import (
     4  	"fmt"
     5  
     6  	. "github.com/onsi/ginkgo/v2"
     7  	. "github.com/onsi/gomega"
     8  )
     9  
    10  var _ = Describe("Token Cache", func() {
    11  	var s TokenStore
    12  
    13  	BeforeEach(func() {
    14  		s = NewLRUTokenStore(3, 4)
    15  	})
    16  
    17  	mockToken := func(num int) *ClientToken {
    18  		return &ClientToken{data: []byte(fmt.Sprintf("%d", num))}
    19  	}
    20  
    21  	Context("for a single origin", func() {
    22  		const origin = "localhost"
    23  
    24  		It("adds and gets tokens", func() {
    25  			s.Put(origin, mockToken(1))
    26  			s.Put(origin, mockToken(2))
    27  			Expect(s.Pop(origin)).To(Equal(mockToken(2)))
    28  			Expect(s.Pop(origin)).To(Equal(mockToken(1)))
    29  			Expect(s.Pop(origin)).To(BeNil())
    30  		})
    31  
    32  		It("overwrites old tokens", func() {
    33  			s.Put(origin, mockToken(1))
    34  			s.Put(origin, mockToken(2))
    35  			s.Put(origin, mockToken(3))
    36  			s.Put(origin, mockToken(4))
    37  			s.Put(origin, mockToken(5))
    38  			Expect(s.Pop(origin)).To(Equal(mockToken(5)))
    39  			Expect(s.Pop(origin)).To(Equal(mockToken(4)))
    40  			Expect(s.Pop(origin)).To(Equal(mockToken(3)))
    41  			Expect(s.Pop(origin)).To(Equal(mockToken(2)))
    42  			Expect(s.Pop(origin)).To(BeNil())
    43  		})
    44  
    45  		It("continues after getting a token", func() {
    46  			s.Put(origin, mockToken(1))
    47  			s.Put(origin, mockToken(2))
    48  			s.Put(origin, mockToken(3))
    49  			Expect(s.Pop(origin)).To(Equal(mockToken(3)))
    50  			s.Put(origin, mockToken(4))
    51  			s.Put(origin, mockToken(5))
    52  			Expect(s.Pop(origin)).To(Equal(mockToken(5)))
    53  			Expect(s.Pop(origin)).To(Equal(mockToken(4)))
    54  			Expect(s.Pop(origin)).To(Equal(mockToken(2)))
    55  			Expect(s.Pop(origin)).To(Equal(mockToken(1)))
    56  			Expect(s.Pop(origin)).To(BeNil())
    57  		})
    58  	})
    59  
    60  	Context("for multiple origins", func() {
    61  		It("adds and gets tokens", func() {
    62  			s.Put("host1", mockToken(1))
    63  			s.Put("host2", mockToken(2))
    64  			Expect(s.Pop("host1")).To(Equal(mockToken(1)))
    65  			Expect(s.Pop("host1")).To(BeNil())
    66  			Expect(s.Pop("host2")).To(Equal(mockToken(2)))
    67  			Expect(s.Pop("host2")).To(BeNil())
    68  		})
    69  
    70  		It("evicts old entries", func() {
    71  			s.Put("host1", mockToken(1))
    72  			s.Put("host2", mockToken(2))
    73  			s.Put("host3", mockToken(3))
    74  			s.Put("host4", mockToken(4))
    75  			Expect(s.Pop("host1")).To(BeNil())
    76  			Expect(s.Pop("host2")).To(Equal(mockToken(2)))
    77  			Expect(s.Pop("host3")).To(Equal(mockToken(3)))
    78  			Expect(s.Pop("host4")).To(Equal(mockToken(4)))
    79  		})
    80  
    81  		It("moves old entries to the front, when new tokens are added", func() {
    82  			s.Put("host1", mockToken(1))
    83  			s.Put("host2", mockToken(2))
    84  			s.Put("host3", mockToken(3))
    85  			s.Put("host1", mockToken(11))
    86  			// make sure one is evicted
    87  			s.Put("host4", mockToken(4))
    88  			Expect(s.Pop("host2")).To(BeNil())
    89  			Expect(s.Pop("host1")).To(Equal(mockToken(11)))
    90  			Expect(s.Pop("host1")).To(Equal(mockToken(1)))
    91  			Expect(s.Pop("host3")).To(Equal(mockToken(3)))
    92  			Expect(s.Pop("host4")).To(Equal(mockToken(4)))
    93  		})
    94  
    95  		It("deletes hosts that are empty", func() {
    96  			s.Put("host1", mockToken(1))
    97  			s.Put("host2", mockToken(2))
    98  			s.Put("host3", mockToken(3))
    99  			Expect(s.Pop("host2")).To(Equal(mockToken(2)))
   100  			Expect(s.Pop("host2")).To(BeNil())
   101  			// host2 is now empty and should have been deleted, making space for host4
   102  			s.Put("host4", mockToken(4))
   103  			Expect(s.Pop("host1")).To(Equal(mockToken(1)))
   104  			Expect(s.Pop("host3")).To(Equal(mockToken(3)))
   105  			Expect(s.Pop("host4")).To(Equal(mockToken(4)))
   106  		})
   107  	})
   108  })