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// _ _
// __ _____ __ ___ ___ __ _| |_ ___
// \ \ /\ / / _ \/ _` \ \ / / |/ _` | __/ _ \
// \ V V / __/ (_| |\ V /| | (_| | || __/
// \_/\_/ \___|\__,_| \_/ |_|\__,_|\__\___|
//
// Copyright © 2016 - 2024 Weaviate B.V. All rights reserved.
//
// CONTACT: [email protected]
//
package aggregator
import (
"math/rand"
"testing"
"github.com/stretchr/testify/assert"
"github.com/weaviate/weaviate/entities/aggregation"
)
const (
YearMonthDayHourMinute = "2022-06-16T18:30:"
NanoSecondsTimeZone = ".451235Z"
)
type TestStructDates struct {
name string
dates1 []string
dates2 []string
expectedMedian string
expectedMaximum string
expectedMode string
expectedMinimum string
}
func TestShardCombinerMergeDates(t *testing.T) {
tests := []TestStructDates{
{
name: "Many values",
dates1: []string{"55", "26", "10"},
dates2: []string{"15", "26", "45", "26"},
expectedMaximum: "55",
expectedMinimum: "10",
expectedMedian: "26",
expectedMode: "26",
},
{
name: "Struct with single element",
dates1: []string{"45"},
dates2: []string{"00", "26", "45", "27"},
expectedMaximum: "45",
expectedMinimum: "00",
expectedMedian: "27",
expectedMode: "45",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
testDates(t, tt.dates1, tt.dates2, tt)
testDates(t, tt.dates2, tt.dates1, tt)
})
}
}
func testDates(t *testing.T, dates1, dates2 []string, tt TestStructDates) {
sc := NewShardCombiner()
dateMap1 := createDateAgg(dates1)
dateMap2 := createDateAgg(dates2)
sc.mergeDateProp(dateMap1, dateMap2)
sc.finalizeDateProp(dateMap1)
assert.Equal(t, YearMonthDayHourMinute+tt.expectedMinimum+NanoSecondsTimeZone, dateMap1["minimum"])
assert.Equal(t, YearMonthDayHourMinute+tt.expectedMaximum+NanoSecondsTimeZone, dateMap1["maximum"])
assert.Equal(t, YearMonthDayHourMinute+tt.expectedMedian+NanoSecondsTimeZone, dateMap1["median"])
assert.Equal(t, int64(len(tt.dates1)+len(tt.dates2)), dateMap1["count"])
assert.Equal(t, YearMonthDayHourMinute+tt.expectedMode+NanoSecondsTimeZone, dateMap1["mode"])
}
func createDateAgg(dates []string) map[string]interface{} {
agg := newDateAggregator()
for _, date := range dates {
agg.AddTimestamp(YearMonthDayHourMinute + date + NanoSecondsTimeZone)
}
agg.buildPairsFromCounts() // needed to populate all required info
prop := aggregation.Property{}
aggs := []aggregation.Aggregator{aggregation.MedianAggregator, aggregation.MinimumAggregator, aggregation.MaximumAggregator, aggregation.CountAggregator, aggregation.ModeAggregator}
addDateAggregations(&prop, aggs, agg)
return prop.DateAggregations
}
type TestStructNumbers struct {
name string
numbers1 []float64
numbers2 []float64
testMode bool
}
func TestShardCombinerMergeNumerical(t *testing.T) {
tests := []TestStructNumbers{
{
name: "Uneven number of elements for both",
numbers1: []float64{0, 9, 9},
numbers2: []float64{2},
testMode: true,
},
{
name: "Even number of elements for both",
numbers1: []float64{0, 5, 10, 15},
numbers2: []float64{15, 15},
testMode: true,
},
{
name: "Mode is affected by merge",
numbers1: []float64{2.5, 2.5, 10, 15},
numbers2: []float64{15, 15},
testMode: true,
},
{
name: "random",
numbers1: createRandomSlice(),
numbers2: createRandomSlice(),
testMode: false,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
testNumbers(t, tt.numbers1, tt.numbers2, tt.testMode)
testNumbers(t, tt.numbers2, tt.numbers1, tt.testMode)
})
}
}
func TestShardCombinerMergeNil(t *testing.T) {
tests := []struct {
name string
results []*aggregation.Result
totalResults int
}{
{
name: "First is nil",
results: []*aggregation.Result{
{
Groups: []aggregation.Group{},
},
{
Groups: []aggregation.Group{{GroupedBy: &aggregation.GroupedBy{Value: 10, Path: []string{"something"}}}},
},
},
totalResults: 1,
},
{
name: "Second is nil",
results: []*aggregation.Result{
{
Groups: []aggregation.Group{{GroupedBy: &aggregation.GroupedBy{Value: 10, Path: []string{"something"}}}},
},
{
Groups: []aggregation.Group{},
},
},
totalResults: 1,
},
{
name: "Both are nil",
results: []*aggregation.Result{
{
Groups: []aggregation.Group{},
},
{
Groups: []aggregation.Group{},
},
},
totalResults: 0,
},
{
name: "Non are nil",
results: []*aggregation.Result{
{
Groups: []aggregation.Group{{GroupedBy: &aggregation.GroupedBy{Value: 9, Path: []string{"other thing"}}}},
},
{
Groups: []aggregation.Group{{GroupedBy: &aggregation.GroupedBy{Value: 10, Path: []string{"something"}}}},
},
},
totalResults: 2,
},
{
name: "Ungrouped with nil",
results: []*aggregation.Result{
{
Groups: []aggregation.Group{{Count: 1}},
},
{
Groups: []aggregation.Group{},
},
},
totalResults: 1,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
combinedResults := NewShardCombiner().Do(tt.results)
assert.Equal(t, len(combinedResults.Groups), tt.totalResults)
})
}
}
func testNumbers(t *testing.T, numbers1, numbers2 []float64, testMode bool) {
sc := NewShardCombiner()
numberMap1 := createNumericalAgg(numbers1)
numberMap2 := createNumericalAgg(numbers2)
combinedMap := createNumericalAgg(append(numbers1, numbers2...))
sc.mergeNumericalProp(numberMap1, numberMap2)
sc.finalizeNumerical(numberMap1)
assert.Equal(t, len(numbers1)+len(numbers2), int(numberMap1["count"].(float64)))
assert.InDelta(t, combinedMap["mean"], numberMap1["mean"], 0.0001)
assert.InDelta(t, combinedMap["median"], numberMap1["median"], 0.0001)
if testMode { // for random numbers the mode is flaky as there is no guaranteed order if several values have the same count
assert.Equal(t, combinedMap["mode"], numberMap1["mode"])
}
}
func createNumericalAgg(numbers []float64) map[string]interface{} {
agg := newNumericalAggregator()
for _, num := range numbers {
agg.AddFloat64(num)
}
agg.buildPairsFromCounts() // needed to populate all required info
prop := aggregation.Property{}
aggs := []aggregation.Aggregator{aggregation.MedianAggregator, aggregation.MeanAggregator, aggregation.ModeAggregator, aggregation.CountAggregator}
addNumericalAggregations(&prop, aggs, agg)
return prop.NumericalAggregations
}
func createRandomSlice() []float64 {
size := rand.Intn(100) + 1 // at least one entry
array := make([]float64, size)
for i := 0; i < size; i++ {
array[i] = rand.Float64() * 1000
}
return array
}
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