github.com/uber/kraken@v0.1.4/lib/healthcheck/state_test.go (about)

     1  // Copyright (c) 2016-2019 Uber Technologies, Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  package healthcheck
    15  
    16  import (
    17  	"testing"
    18  
    19  	"github.com/uber/kraken/utils/stringset"
    20  
    21  	"github.com/stretchr/testify/require"
    22  )
    23  
    24  func TestStateHealthTransition(t *testing.T) {
    25  	require := require.New(t)
    26  
    27  	s := newState(FilterConfig{Fails: 3, Passes: 2})
    28  
    29  	addr := "foo:80"
    30  
    31  	s.passed(addr) // +1
    32  	require.Empty(s.getHealthy())
    33  
    34  	s.passed(addr) // +2 (healthy)
    35  	require.Equal(stringset.New(addr), s.getHealthy())
    36  
    37  	s.passed(addr) // +2 (noop)
    38  	require.Equal(stringset.New(addr), s.getHealthy())
    39  
    40  	s.failed(addr) // -1
    41  	require.Equal(stringset.New(addr), s.getHealthy())
    42  
    43  	s.failed(addr) // -2
    44  	require.Equal(stringset.New(addr), s.getHealthy())
    45  
    46  	s.failed(addr) // -3 (unhealthy)
    47  	require.Empty(s.getHealthy())
    48  
    49  	s.failed(addr) // -3 (noop)
    50  	require.Empty(s.getHealthy())
    51  
    52  	s.passed(addr) // +1
    53  	require.Empty(s.getHealthy())
    54  
    55  	s.passed(addr) // +2 (healthy)
    56  	require.Equal(stringset.New(addr), s.getHealthy())
    57  
    58  	s.passed(addr) // +2 (noop)
    59  	require.Equal(stringset.New(addr), s.getHealthy())
    60  }
    61  
    62  func TestStateHealthTrendResets(t *testing.T) {
    63  	require := require.New(t)
    64  
    65  	s := newState(FilterConfig{Fails: 3, Passes: 2})
    66  
    67  	addr := "foo:80"
    68  
    69  	s.passed(addr) // +1
    70  	require.Empty(s.getHealthy())
    71  
    72  	s.passed(addr) // +2 (healthy)
    73  	require.Equal(stringset.New(addr), s.getHealthy())
    74  
    75  	s.failed(addr) // -1
    76  	require.Equal(stringset.New(addr), s.getHealthy())
    77  
    78  	s.failed(addr) // -2
    79  	require.Equal(stringset.New(addr), s.getHealthy())
    80  
    81  	s.passed(addr) // +1 (resets)
    82  	require.Equal(stringset.New(addr), s.getHealthy())
    83  
    84  	s.failed(addr) // -1
    85  	require.Equal(stringset.New(addr), s.getHealthy())
    86  
    87  	s.failed(addr) // -2
    88  	require.Equal(stringset.New(addr), s.getHealthy())
    89  
    90  	s.failed(addr) // -3 (unhealthy)
    91  	require.Empty(s.getHealthy())
    92  }
    93  
    94  func TestStateSync(t *testing.T) {
    95  	require := require.New(t)
    96  
    97  	s := newState(FilterConfig{Fails: 1, Passes: 1})
    98  
    99  	addr1 := "foo:80"
   100  	addr2 := "bar:80"
   101  
   102  	s.sync(stringset.New(addr1, addr2))
   103  
   104  	require.Equal(stringset.New(addr1, addr2), s.getHealthy())
   105  
   106  	s.sync(stringset.New(addr1))
   107  
   108  	require.Equal(stringset.New(addr1), s.getHealthy())
   109  }