github.com/m3db/m3@v1.5.0/src/query/promqlengine/cache_test.go (about)

     1  // Copyright (c) 2021 Uber Technologies, Inc.
     2  //
     3  // Permission is hereby granted, free of charge, to any person obtaining a copy
     4  // of this software and associated documentation files (the "Software"), to deal
     5  // in the Software without restriction, including without limitation the rights
     6  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     7  // copies of the Software, and to permit persons to whom the Software is
     8  // furnished to do so, subject to the following conditions:
     9  //
    10  // The above copyright notice and this permission notice shall be included in
    11  // all copies or substantial portions of the Software.
    12  //
    13  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    14  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    15  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    16  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    17  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    18  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    19  // THE SOFTWARE.
    20  
    21  package promqlengine
    22  
    23  import (
    24  	"errors"
    25  	"testing"
    26  	"time"
    27  
    28  	"github.com/prometheus/prometheus/promql"
    29  	"github.com/stretchr/testify/assert"
    30  	"github.com/stretchr/testify/require"
    31  )
    32  
    33  func TestGet(t *testing.T) {
    34  	lookback := time.Second
    35  	expected := newTestEngine(lookback)
    36  	cache := NewCache(map[time.Duration]*promql.Engine{}, func(l time.Duration) (*promql.Engine, error) {
    37  		if l == lookback {
    38  			return expected, nil
    39  		}
    40  		return &promql.Engine{}, errors.New(l.String())
    41  	})
    42  
    43  	actual, err := cache.Get(lookback)
    44  	require.NoError(t, err)
    45  	assert.Equal(t, expected, actual)
    46  
    47  	_, err = cache.Get(time.Minute)
    48  	require.EqualError(t, err, time.Minute.String())
    49  }
    50  
    51  func TestDefaultEngines(t *testing.T) {
    52  	expecteds := map[time.Duration]*promql.Engine{
    53  		time.Second: newTestEngine(time.Second),
    54  		time.Minute: newTestEngine(time.Minute),
    55  		time.Hour:   newTestEngine(time.Hour),
    56  	}
    57  
    58  	cache := NewCache(expecteds, func(l time.Duration) (*promql.Engine, error) {
    59  		return &promql.Engine{}, errors.New("not set")
    60  	})
    61  
    62  	for l, expected := range expecteds {
    63  		engine, err := cache.Get(l)
    64  		require.NoError(t, err)
    65  		require.Equal(t, expected, engine)
    66  	}
    67  }
    68  
    69  func newTestEngine(l time.Duration) *promql.Engine {
    70  	return promql.NewEngine(promql.EngineOpts{
    71  		LookbackDelta: l,
    72  	})
    73  }