github.com/m3db/m3@v1.5.0/src/query/block/empty_test.go (about)

     1  // Copyright (c) 2019 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 block
    22  
    23  import (
    24  	"testing"
    25  	"time"
    26  
    27  	"github.com/stretchr/testify/assert"
    28  
    29  	"github.com/m3db/m3/src/query/models"
    30  	xtime "github.com/m3db/m3/src/x/time"
    31  )
    32  
    33  var (
    34  	emptyArgs = []interface{}{}
    35  	start     = xtime.Now()
    36  	steps     = 15
    37  	testBound = models.Bounds{
    38  		Start:    start,
    39  		Duration: time.Minute * time.Duration(steps),
    40  		StepSize: time.Minute,
    41  	}
    42  )
    43  
    44  func TestEmptyBlock(t *testing.T) {
    45  	meta := Metadata{
    46  		Tags:   models.MustMakeTags("a", "b"),
    47  		Bounds: testBound,
    48  	}
    49  
    50  	bl := NewEmptyBlock(meta)
    51  	assert.True(t, meta.Equals(bl.Meta()))
    52  
    53  	step, err := bl.StepIter()
    54  	assert.NoError(t, err)
    55  	assert.NoError(t, step.Err())
    56  	assert.False(t, step.Next())
    57  	assert.Equal(t, steps, step.StepCount())
    58  	assert.Equal(t, []SeriesMeta{}, step.SeriesMeta())
    59  
    60  	assert.NotPanics(t, func() {
    61  		step.Close()
    62  	})
    63  
    64  	series, err := bl.SeriesIter()
    65  	assert.NoError(t, err)
    66  	assert.NoError(t, series.Err())
    67  	assert.False(t, series.Next())
    68  	assert.Equal(t, 0, series.SeriesCount())
    69  	assert.Equal(t, []SeriesMeta{}, series.SeriesMeta())
    70  
    71  	assert.NotPanics(t, func() {
    72  		series.Close()
    73  	})
    74  
    75  	concurrency := 5
    76  	batch, err := bl.MultiSeriesIter(concurrency)
    77  	assert.NoError(t, err)
    78  	assert.Equal(t, concurrency, len(batch))
    79  	for _, b := range batch {
    80  		assert.Equal(t, 1, b.Size)
    81  		assert.False(t, b.Iter.Next())
    82  	}
    83  
    84  	assert.NoError(t, bl.Close())
    85  }