package octest

import "gocloud.dev/internal/testing/octest"

Package octest supports testing of OpenCensus integrations.

Index ¶

• func Diff(gotSpans []*trace.SpanData, gotRows []*view.Row, namePrefix, provider string, want []Call) string
• type Call
• type TestExporter
• func NewTestExporter(views []*view.View) *TestExporter
• func (te *TestExporter) Counts() []*view.Row
• func (te *TestExporter) ExportSpan(s *trace.SpanData)
• func (te *TestExporter) ExportView(vd *view.Data)
• func (te *TestExporter) Spans() []*trace.SpanData
• func (te *TestExporter) Unregister()

Functions ¶

func Diff ¶

func Diff(gotSpans []*trace.SpanData, gotRows []*view.Row, namePrefix, provider string, want []Call) string

Diff compares the list of spans and metric counts obtained from OpenCensus instrumentation (using the TestExporter in this package, or similar) with an expected list of calls. Only the name and code are compared. Order matters for traces (though not for metrics).

Types ¶

type Call ¶

type Call struct {
	Method string
	Code   gcerrors.ErrorCode
}

Call holds the expected contents of a measured call. It is used for both metric and trace comparison.

type TestExporter ¶

type TestExporter struct {
	Stats chan *view.Data
	// contains filtered or unexported fields
}

TestExporter is an exporter of OpenCensus traces and metrics, for testing. It should be created with NewTestExporter.

func NewTestExporter ¶

func NewTestExporter(views []*view.View) *TestExporter

NewTestExporter creates a TestExporter and registers it with OpenCensus.

func (*TestExporter) Counts ¶

func (te *TestExporter) Counts() []*view.Row

Counts returns the first exported data that includes aggregated counts.

func (*TestExporter) ExportSpan ¶

func (te *TestExporter) ExportSpan(s *trace.SpanData)

ExportSpan "exports" a span by remembering it.

func (*TestExporter) ExportView ¶

func (te *TestExporter) ExportView(vd *view.Data)

ExportView exports a view by writing it to the Stats channel.

func (*TestExporter) Spans ¶

func (te *TestExporter) Spans() []*trace.SpanData

Spans returns the exporter's traces.

func (*TestExporter) Unregister ¶

func (te *TestExporter) Unregister()

Unregister unregisters the exporter from OpenCensus.

Source Files ¶

diff.go exporter.go