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trace_integration_test.go
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// Copyright 2022 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package bigquery
import (
"context"
"strings"
"testing"
"time"
"go.opencensus.io/trace"
)
// testExporter is a testing exporter for validating captured spans.
type testExporter struct {
spans []*trace.SpanData
}
func (te *testExporter) ExportSpan(s *trace.SpanData) {
te.spans = append(te.spans, s)
}
// hasSpans checks that the exporter has all the span names
// specified in the slice. It returns the unmatched names.
func (te *testExporter) hasSpans(names []string) []string {
matches := make(map[string]struct{})
for _, n := range names {
matches[n] = struct{}{}
}
for _, s := range te.spans {
delete(matches, s.Name)
}
var unmatched []string
for k := range matches {
unmatched = append(unmatched, k)
}
return unmatched
}
func TestIntegration_Tracing(t *testing.T) {
if client == nil {
t.Skip("Integration tests skipped")
}
ctx := context.Background()
for _, tc := range []struct {
description string
callF func(ctx context.Context)
wantSpans []string
}{
{
description: "fast path query",
callF: func(ctx context.Context) {
client.Query("SELECT SESSION_USER()").Read(ctx)
},
wantSpans: []string{"bigquery.jobs.query", "cloud.google.com/go/bigquery.Query.Run"},
},
{
description: "slow path query",
callF: func(ctx context.Context) {
q := client.Query("SELECT SESSION_USER()")
q.JobTimeout = time.Hour
q.Read(ctx)
},
wantSpans: []string{"bigquery.jobs.insert", "bigquery.jobs.getQueryResults", "cloud.google.com/go/bigquery.Job.Read", "cloud.google.com/go/bigquery.Query.Run"},
},
{
description: "table metadata",
callF: func(ctx context.Context) {
client.DatasetInProject("bigquery-public-data", "samples").Table("shakespeare").Metadata(ctx)
},
wantSpans: []string{"bigquery.tables.get", "cloud.google.com/go/bigquery.Table.Metadata"},
},
} {
exporter := &testExporter{}
trace.RegisterExporter(exporter)
traceCtx, span := trace.StartSpan(ctx, "testspan", trace.WithSampler(trace.AlwaysSample()))
tc.callF(traceCtx)
span.End()
trace.UnregisterExporter(exporter)
if unmatched := exporter.hasSpans(tc.wantSpans); len(unmatched) > 0 {
t.Errorf("case (%s): unmatched spans: %s", tc.description, strings.Join(unmatched, ","))
}
}
}