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statistics.go
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statistics.go
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package setup
import (
"sync"
"testing"
"time"
)
// TestStatistics represents the statistics of a specific test
type TestStatistics struct {
Name string
SetupTime time.Duration
TeardownTime time.Duration
}
// Clone returns an exact deep copy of the object
func (ts *TestStatistics) Clone() *TestStatistics {
if ts == nil {
return nil
}
return &TestStatistics{
Name: ts.Name,
SetupTime: ts.SetupTime,
TeardownTime: ts.TeardownTime,
}
}
// StatisticsRecorder represents the statistics recorder and computer
type StatisticsRecorder struct {
lock *sync.Mutex
tests []*TestStatistics
byName map[string]*TestStatistics
}
// Statistics represents the final computed statistics
type Statistics struct {
Tests []*TestStatistics
MinSetupTime time.Duration
MinSetupTimeTest string
MaxSetupTime time.Duration
MaxSetupTimeTest string
MinTeardownTime time.Duration
MinTeardownTimeTest string
MaxTeardownTime time.Duration
MaxTeardownTimeTest string
AvgSetupTime time.Duration
AvgTeardownTime time.Duration
}
// NewStatisticsRecorder constructs a new statistics recorder instance
func NewStatisticsRecorder() *StatisticsRecorder {
return &StatisticsRecorder{
lock: &sync.Mutex{},
tests: make([]*TestStatistics, 0),
byName: make(map[string]*TestStatistics),
}
}
// Set allows to safely modify a certain tests statistics.
// It will automatically create a test if it's not yet registered
func (sr *StatisticsRecorder) Set(
t *testing.T,
mutator func(*TestStatistics),
) {
testName := t.Name()
sr.lock.Lock()
stats, defined := sr.byName[testName]
if defined {
mutator(stats)
stats.Name = testName
} else {
newTestStats := &TestStatistics{}
mutator(newTestStats)
newTestStats.Name = testName
sr.byName[testName] = newTestStats
sr.tests = append(sr.tests, newTestStats)
}
sr.lock.Unlock()
}
// Compute will compute and return the final statistics based on the recordings
func (sr *StatisticsRecorder) Compute() *Statistics {
sr.lock.Lock()
copiedTests := make([]*TestStatistics, len(sr.tests))
for i, tst := range sr.tests {
copiedTests[i] = tst.Clone()
}
sr.lock.Unlock()
if len(copiedTests) < 0 {
return &Statistics{
Tests: make([]*TestStatistics, 0),
}
}
// Compute statistics
var minSetupTimeTest, maxSetupTimeTest,
minTeardownTimeTest, maxTeardownTimeTest string
var minSetupTime, maxSetupTime, avgSetupTime time.Duration
var minTeardownTime, maxTeardownTime, avgTeardownTime time.Duration
for i, testStats := range copiedTests {
// Determine min setup time
if minSetupTime == 0 || testStats.SetupTime < minSetupTime {
minSetupTime = testStats.SetupTime
minSetupTimeTest = testStats.Name
}
// Determine max setup time
if maxSetupTime == 0 || testStats.SetupTime > maxSetupTime {
maxSetupTime = testStats.SetupTime
maxSetupTimeTest = testStats.Name
}
// Determine min teardown time
if minTeardownTime == 0 || testStats.TeardownTime < minTeardownTime {
minTeardownTime = testStats.TeardownTime
minTeardownTimeTest = testStats.Name
}
// Determine max teardown time
if maxTeardownTime == 0 || testStats.TeardownTime > maxTeardownTime {
maxTeardownTime = testStats.TeardownTime
maxTeardownTimeTest = testStats.Name
}
// Determine average setup time
if avgSetupTime == 0 {
avgSetupTime = testStats.SetupTime
} else {
avgSetupTime = avgSetupTime + (testStats.SetupTime-avgSetupTime)/time.Duration(i)
}
// Determine average teardown time
if avgTeardownTime == 0 {
avgTeardownTime = testStats.TeardownTime
} else {
avgTeardownTime = avgTeardownTime + (testStats.TeardownTime-avgTeardownTime)/time.Duration(i)
}
}
return &Statistics{
Tests: copiedTests,
MinSetupTime: minSetupTime,
MinSetupTimeTest: minSetupTimeTest,
MaxSetupTime: maxSetupTime,
MaxSetupTimeTest: maxSetupTimeTest,
MinTeardownTime: minTeardownTime,
MinTeardownTimeTest: minTeardownTimeTest,
MaxTeardownTime: maxTeardownTime,
MaxTeardownTimeTest: maxTeardownTimeTest,
AvgSetupTime: avgSetupTime,
AvgTeardownTime: avgTeardownTime,
}
}