package testutil import ( "encoding/json" "fmt" "reflect" "sync" "sync/atomic" "testing" "time" "github.com/stretchr/testify/assert" ) // Metric defines a single point measurement type Metric struct { Measurement string Tags map[string]string Fields map[string]interface{} Time time.Time } func (p *Metric) String() string { return fmt.Sprintf("%s %v", p.Measurement, p.Fields) } // Accumulator defines a mocked out accumulator type Accumulator struct { sync.Mutex Metrics []*Metric nMetrics uint64 Discard bool Errors []error debug bool } func (a *Accumulator) NMetrics() uint64 { return atomic.LoadUint64(&a.nMetrics) } func (a *Accumulator) ClearMetrics() { atomic.StoreUint64(&a.nMetrics, 0) a.Lock() defer a.Unlock() a.Metrics = make([]*Metric, 0) } // AddFields adds a measurement point with a specified timestamp. func (a *Accumulator) AddFields( measurement string, fields map[string]interface{}, tags map[string]string, timestamp ...time.Time, ) { atomic.AddUint64(&a.nMetrics, 1) if a.Discard { return } a.Lock() defer a.Unlock() if tags == nil { tags = map[string]string{} } if len(fields) == 0 { return } var t time.Time if len(timestamp) > 0 { t = timestamp[0] } else { t = time.Now() } if a.debug { pretty, _ := json.MarshalIndent(fields, "", " ") prettyTags, _ := json.MarshalIndent(tags, "", " ") msg := fmt.Sprintf("Adding Measurement [%s]\nFields:%s\nTags:%s\n", measurement, string(pretty), string(prettyTags)) fmt.Print(msg) } p := &Metric{ Measurement: measurement, Fields: fields, Tags: tags, Time: t, } a.Metrics = append(a.Metrics, p) } func (a *Accumulator) AddCounter( measurement string, fields map[string]interface{}, tags map[string]string, timestamp ...time.Time, ) { a.AddFields(measurement, fields, tags, timestamp...) } func (a *Accumulator) AddGauge( measurement string, fields map[string]interface{}, tags map[string]string, timestamp ...time.Time, ) { a.AddFields(measurement, fields, tags, timestamp...) } // AddError appends the given error to Accumulator.Errors. func (a *Accumulator) AddError(err error) { if err == nil { return } a.Lock() a.Errors = append(a.Errors, err) a.Unlock() } func (a *Accumulator) SetPrecision(precision, interval time.Duration) { return } func (a *Accumulator) DisablePrecision() { return } func (a *Accumulator) Debug() bool { // stub for implementing Accumulator interface. return a.debug } func (a *Accumulator) SetDebug(debug bool) { // stub for implementing Accumulator interface. a.debug = debug } // Get gets the specified measurement point from the accumulator func (a *Accumulator) Get(measurement string) (*Metric, bool) { for _, p := range a.Metrics { if p.Measurement == measurement { return p, true } } return nil, false } // NFields returns the total number of fields in the accumulator, across all // measurements func (a *Accumulator) NFields() int { a.Lock() defer a.Unlock() counter := 0 for _, pt := range a.Metrics { for _, _ = range pt.Fields { counter++ } } return counter } func (a *Accumulator) AssertContainsTaggedFields( t *testing.T, measurement string, fields map[string]interface{}, tags map[string]string, ) { a.Lock() defer a.Unlock() for _, p := range a.Metrics { if !reflect.DeepEqual(tags, p.Tags) { continue } if p.Measurement == measurement { assert.Equal(t, fields, p.Fields) return } } msg := fmt.Sprintf("unknown measurement %s with tags %v", measurement, tags) assert.Fail(t, msg) } func (a *Accumulator) AssertContainsFields( t *testing.T, measurement string, fields map[string]interface{}, ) { a.Lock() defer a.Unlock() for _, p := range a.Metrics { if p.Measurement == measurement { assert.Equal(t, fields, p.Fields) return } } msg := fmt.Sprintf("unknown measurement %s", measurement) assert.Fail(t, msg) } // HasIntValue returns true if the measurement has an Int value func (a *Accumulator) HasIntField(measurement string, field string) bool { a.Lock() defer a.Unlock() for _, p := range a.Metrics { if p.Measurement == measurement { for fieldname, value := range p.Fields { if fieldname == field { _, ok := value.(int64) return ok } } } } return false } // HasUIntValue returns true if the measurement has a UInt value func (a *Accumulator) HasUIntField(measurement string, field string) bool { a.Lock() defer a.Unlock() for _, p := range a.Metrics { if p.Measurement == measurement { for fieldname, value := range p.Fields { if fieldname == field { _, ok := value.(uint64) return ok } } } } return false } // HasFloatValue returns true if the given measurement has a float value func (a *Accumulator) HasFloatField(measurement string, field string) bool { a.Lock() defer a.Unlock() for _, p := range a.Metrics { if p.Measurement == measurement { for fieldname, value := range p.Fields { if fieldname == field { _, ok := value.(float64) return ok } } } } return false } // HasMeasurement returns true if the accumulator has a measurement with the // given name func (a *Accumulator) HasMeasurement(measurement string) bool { a.Lock() defer a.Unlock() for _, p := range a.Metrics { if p.Measurement == measurement { return true } } return false }