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accumulator.go
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/
accumulator.go
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package testutil
import (
"encoding/json"
"fmt"
"reflect"
"sync"
"testing"
"time"
"github.com/stretchr/testify/assert"
)
// Point defines a single point measurement
type Point struct {
Measurement string
Tags map[string]string
Fields map[string]interface{}
Time time.Time
}
func (p *Point) String() string {
return fmt.Sprintf("%s %v", p.Measurement, p.Fields)
}
// Accumulator defines a mocked out accumulator
type Accumulator struct {
sync.Mutex
Points []*Point
debug bool
}
// Add adds a measurement point to the accumulator
func (a *Accumulator) Add(
measurement string,
value interface{},
tags map[string]string,
t ...time.Time,
) {
fields := map[string]interface{}{"value": value}
a.AddFields(measurement, fields, tags, t...)
}
// 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,
) {
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 := &Point{
Measurement: measurement,
Fields: fields,
Tags: tags,
Time: t,
}
a.Points = append(a.Points, p)
}
func (a *Accumulator) SetDefaultTags(tags map[string]string) {
// stub for implementing Accumulator interface.
}
func (a *Accumulator) AddDefaultTag(key, value string) {
// stub for implementing Accumulator interface.
}
func (a *Accumulator) Prefix() string {
// stub for implementing Accumulator interface.
return ""
}
func (a *Accumulator) SetPrefix(prefix string) {
// stub for implementing Accumulator interface.
}
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) (*Point, bool) {
for _, p := range a.Points {
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 {
counter := 0
for _, pt := range a.Points {
for _, _ = range pt.Fields {
counter++
}
}
return counter
}
func (a *Accumulator) AssertContainsTaggedFields(
t *testing.T,
measurement string,
fields map[string]interface{},
tags map[string]string,
) {
for _, p := range a.Points {
if !reflect.DeepEqual(tags, p.Tags) {
continue
}
if p.Measurement == measurement {
if !reflect.DeepEqual(fields, p.Fields) {
pActual, _ := json.MarshalIndent(p.Fields, "", " ")
pExp, _ := json.MarshalIndent(fields, "", " ")
msg := fmt.Sprintf("Actual:\n%s\n(%T) \nExpected:\n%s\n(%T)",
string(pActual), p.Fields, string(pExp), fields)
assert.Fail(t, msg)
}
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{},
) {
for _, p := range a.Points {
if p.Measurement == measurement {
if !reflect.DeepEqual(fields, p.Fields) {
pActual, _ := json.MarshalIndent(p.Fields, "", " ")
pExp, _ := json.MarshalIndent(fields, "", " ")
msg := fmt.Sprintf("Actual:\n%s\n(%T) \nExpected:\n%s\n(%T)",
string(pActual), p.Fields, string(pExp), fields)
assert.Fail(t, msg)
}
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 {
for _, p := range a.Points {
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 {
for _, p := range a.Points {
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 {
for _, p := range a.Points {
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 {
for _, p := range a.Points {
if p.Measurement == measurement {
return true
}
}
return false
}