101 lines
2.9 KiB
Go
101 lines
2.9 KiB
Go
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package prometheus
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import (
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"context"
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"fmt"
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"github.com/micro/go-micro/client"
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"github.com/micro/go-micro/registry/memory"
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"github.com/micro/go-micro/selector"
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"github.com/micro/go-micro/server"
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"github.com/prometheus/client_golang/prometheus"
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dto "github.com/prometheus/client_model/go"
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"github.com/stretchr/testify/assert"
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"testing"
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)
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type Test interface {
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Method(ctx context.Context, in *TestRequest, opts ...client.CallOption) (*TestResponse, error)
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}
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type TestRequest struct {
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IsError bool
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}
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type TestResponse struct{}
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type testHandler struct{}
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func (t *testHandler) Method(ctx context.Context, req *TestRequest, rsp *TestResponse) error {
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if req.IsError {
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return fmt.Errorf("test error")
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}
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return nil
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}
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func TestPrometheusMetrics(t *testing.T) {
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// setup
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registry := memory.NewRegistry()
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sel := selector.NewSelector(selector.Registry(registry))
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name := "test"
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c := client.NewClient(client.Selector(sel))
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s := server.NewServer(
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server.Name(name),
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server.Registry(registry),
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server.WrapHandler(NewHandlerWrapper()),
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)
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type Test struct {
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*testHandler
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}
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s.Handle(
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s.NewHandler(&Test{new(testHandler)}),
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)
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if err := s.Start(); err != nil {
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t.Fatalf("Unexpected error starting server: %v", err)
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}
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req := c.NewRequest(name, "Test.Method", &TestRequest{IsError: false}, client.WithContentType("application/json"))
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rsp := TestResponse{}
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assert.NoError(t, c.Call(context.TODO(), req, &rsp))
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req = c.NewRequest(name, "Test.Method", &TestRequest{IsError: true}, client.WithContentType("application/json"))
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assert.Error(t, c.Call(context.TODO(), req, &rsp))
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list, _ := prometheus.DefaultGatherer.Gather()
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metric := findMetricByName(list, dto.MetricType_SUMMARY, "go_micro_request_durations_microseconds")
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assert.Equal(t, *metric.Metric[0].Label[0].Name, "method")
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assert.Equal(t, *metric.Metric[0].Label[0].Value, "Test.Method")
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assert.Equal(t, *metric.Metric[0].Summary.SampleCount, uint64(2))
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assert.True(t, *metric.Metric[0].Summary.SampleSum > 0)
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metric = findMetricByName(list, dto.MetricType_COUNTER, "go_micro_requests_total")
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assert.Equal(t, *metric.Metric[0].Label[0].Name, "method")
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assert.Equal(t, *metric.Metric[0].Label[0].Value, "Test.Method")
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assert.Equal(t, *metric.Metric[0].Label[1].Name, "status")
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assert.Equal(t, *metric.Metric[0].Label[1].Value, "fail")
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assert.Equal(t, *metric.Metric[0].Counter.Value, float64(1))
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assert.Equal(t, *metric.Metric[1].Label[0].Name, "method")
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assert.Equal(t, *metric.Metric[1].Label[0].Value, "Test.Method")
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assert.Equal(t, *metric.Metric[1].Label[1].Name, "status")
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assert.Equal(t, *metric.Metric[1].Label[1].Value, "success")
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assert.Equal(t, *metric.Metric[1].Counter.Value, float64(1))
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s.Stop()
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}
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func findMetricByName(list []*dto.MetricFamily, tp dto.MetricType, name string) *dto.MetricFamily {
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for _, metric := range list {
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if *metric.Name == name && *metric.Type == tp {
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return metric
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}
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}
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return nil
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}
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