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mock_iter.go
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mock_iter.go
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// Copyright (c) 2018 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package seriesiter
import (
"time"
"github.com/m3db/m3/src/dbnode/encoding"
m3ts "github.com/m3db/m3/src/dbnode/ts"
"github.com/m3db/m3x/ident"
xtime "github.com/m3db/m3x/time"
"github.com/golang/mock/gomock"
)
// GenerateSingleSampleTagIterator generates a new tag iterator
func GenerateSingleSampleTagIterator(ctrl *gomock.Controller, tag ident.Tag) ident.TagIterator {
mockTagIterator := ident.NewMockTagIterator(ctrl)
mockTagIterator.EXPECT().Duplicate().Return(mockTagIterator).MaxTimes(1)
mockTagIterator.EXPECT().Remaining().Return(1).MaxTimes(1)
mockTagIterator.EXPECT().Next().Return(true).MaxTimes(1)
mockTagIterator.EXPECT().Current().Return(tag).MaxTimes(1)
mockTagIterator.EXPECT().Next().Return(false).MaxTimes(1)
mockTagIterator.EXPECT().Err().Return(nil).MaxTimes(1)
mockTagIterator.EXPECT().Close().AnyTimes()
return mockTagIterator
}
// GenerateTag generates a new tag
func GenerateTag() ident.Tag {
return ident.Tag{
Name: ident.StringID("foo"),
Value: ident.StringID("bar"),
}
}
// NewMockSeriesIterSlice generates a slice of mock series iterators
func NewMockSeriesIterSlice(
ctrl *gomock.Controller,
tagGenerator func() ident.TagIterator,
len int,
numValues int,
) []encoding.SeriesIterator {
iteratorList := make([]encoding.SeriesIterator, 0, len)
for i := 0; i < len; i++ {
mockIter := encoding.NewMockSeriesIterator(ctrl)
mockIter.EXPECT().Next().Return(true).MaxTimes(numValues)
mockIter.EXPECT().Next().Return(false).MaxTimes(1)
now := time.Now()
for i := 0; i < numValues; i++ {
mockIter.EXPECT().Current().Return(m3ts.Datapoint{Timestamp: now.Add(time.Duration(i*10) * time.Second), Value: float64(i)}, xtime.Millisecond, nil).MaxTimes(1)
}
tags := tagGenerator()
mockIter.EXPECT().Namespace().Return(ident.StringID("foo")).AnyTimes()
mockIter.EXPECT().ID().Return(ident.StringID("bar")).AnyTimes()
mockIter.EXPECT().Tags().Return(tags).MaxTimes(1)
mockIter.EXPECT().Close().Do(func() {
// Make sure to close the tags generated when closing the iter
tags.Close()
}).AnyTimes()
iteratorList = append(iteratorList, mockIter)
}
return iteratorList
}
// NewMockSeriesIters generates a new mock series iters
func NewMockSeriesIters(
ctrl *gomock.Controller,
tags ident.Tag,
l int,
numValues int,
) encoding.SeriesIterators {
tagGenerator := func() ident.TagIterator {
return GenerateSingleSampleTagIterator(ctrl, tags)
}
iteratorList := NewMockSeriesIterSlice(ctrl, tagGenerator, l, numValues)
mockIters := encoding.NewMockSeriesIterators(ctrl)
mockIters.EXPECT().Iters().Return(iteratorList).AnyTimes()
mockIters.EXPECT().Len().Return(l).AnyTimes()
mockIters.EXPECT().Close().Do(func() {
// Make sure to close the iterators
for _, iter := range iteratorList {
if iter != nil {
iter.Close()
}
}
}).AnyTimes()
return mockIters
}