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interceptor_test.go
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interceptor_test.go
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package connect_go_prometheus
import (
"context"
"net/http"
"net/http/httptest"
"testing"
"github.com/bufbuild/connect-go"
"github.com/easyCZ/connect-go-prometheus/gen/greet"
"github.com/easyCZ/connect-go-prometheus/gen/greet/greetconnect"
prom "github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/testutil"
"github.com/stretchr/testify/require"
)
var (
testMetricOptions = []MetricsOption{
WithHistogram(true),
WithNamespace("namespace"),
WithSubsystem("subsystem"),
WithConstLabels(prom.Labels{"component": "foo"}),
WithHistogramBuckets([]float64{1, 5}),
}
)
func TestInterceptor_WithClient_WithServer_Histogram(t *testing.T) {
reg := prom.NewRegistry()
clientMetrics := NewClientMetrics(testMetricOptions...)
serverMetrics := NewServerMetrics(testMetricOptions...)
reg.MustRegister(clientMetrics, serverMetrics)
interceptor := NewInterceptor(WithClientMetrics(clientMetrics), WithServerMetrics(serverMetrics))
_, handler := greetconnect.NewGreetServiceHandler(greetconnect.UnimplementedGreetServiceHandler{}, connect.WithInterceptors(interceptor))
srv := httptest.NewServer(handler)
client := greetconnect.NewGreetServiceClient(http.DefaultClient, srv.URL, connect.WithInterceptors(interceptor))
_, err := client.Greet(context.Background(), connect.NewRequest(&greet.GreetRequest{
Name: "elza",
}))
require.Error(t, err)
require.Equal(t, connect.CodeOf(err), connect.CodeUnimplemented)
expectedMetrics := []string{
"namespace_subsystem_connect_client_handled_seconds",
"namespace_subsystem_connect_client_handled_total",
"namespace_subsystem_connect_client_started_total",
"namespace_subsystem_connect_server_handled_seconds",
"namespace_subsystem_connect_server_handled_total",
"namespace_subsystem_connect_server_started_total",
}
count, err := testutil.GatherAndCount(reg, expectedMetrics...)
require.NoError(t, err)
require.Equal(t, len(expectedMetrics), count)
}
func TestInterceptor_Default(t *testing.T) {
interceptor := NewInterceptor()
_, handler := greetconnect.NewGreetServiceHandler(greetconnect.UnimplementedGreetServiceHandler{}, connect.WithInterceptors(interceptor))
srv := httptest.NewServer(handler)
client := greetconnect.NewGreetServiceClient(http.DefaultClient, srv.URL, connect.WithInterceptors(interceptor))
_, err := client.Greet(context.Background(), connect.NewRequest(&greet.GreetRequest{
Name: "elza",
}))
require.Error(t, err)
require.Equal(t, connect.CodeOf(err), connect.CodeUnimplemented)
expectedMetrics := []string{
"connect_client_handled_total",
"connect_client_started_total",
"connect_server_handled_total",
"connect_server_started_total",
}
count, err := testutil.GatherAndCount(prom.DefaultGatherer, expectedMetrics...)
require.NoError(t, err)
require.Equal(t, len(expectedMetrics), count)
}
func TestInterceptor_WithClientMetrics(t *testing.T) {
reg := prom.NewRegistry()
clientMetrics := NewClientMetrics(testMetricOptions...)
require.NoError(t, reg.Register(clientMetrics))
interceptor := NewInterceptor(WithClientMetrics(clientMetrics), WithServerMetrics(nil))
_, handler := greetconnect.NewGreetServiceHandler(greetconnect.UnimplementedGreetServiceHandler{}, connect.WithInterceptors(interceptor))
srv := httptest.NewServer(handler)
client := greetconnect.NewGreetServiceClient(http.DefaultClient, srv.URL, connect.WithInterceptors(interceptor))
_, err := client.Greet(context.Background(), connect.NewRequest(&greet.GreetRequest{
Name: "elza",
}))
require.Error(t, err)
require.Equal(t, connect.CodeOf(err), connect.CodeUnimplemented)
possibleMetrics := []string{
"namespace_subsystem_connect_client_handled_seconds",
"namespace_subsystem_connect_client_handled_total",
"namespace_subsystem_connect_client_started_total",
"namespace_subsystem_connect_server_handled_seconds",
"namespace_subsystem_connect_server_handled_total",
"namespace_subsystem_connect_server_started_total",
}
count, err := testutil.GatherAndCount(reg, possibleMetrics...)
require.NoError(t, err)
require.Equal(t, 3, count, "must report only 3 metrics, as server side is disabled")
}
func TestInterceptor_WithServerMetrics(t *testing.T) {
reg := prom.NewRegistry()
serverMetrics := NewServerMetrics(testMetricOptions...)
require.NoError(t, reg.Register(serverMetrics))
interceptor := NewInterceptor(WithServerMetrics(serverMetrics), WithClientMetrics(nil))
_, handler := greetconnect.NewGreetServiceHandler(greetconnect.UnimplementedGreetServiceHandler{}, connect.WithInterceptors(interceptor))
srv := httptest.NewServer(handler)
client := greetconnect.NewGreetServiceClient(http.DefaultClient, srv.URL, connect.WithInterceptors(interceptor))
_, err := client.Greet(context.Background(), connect.NewRequest(&greet.GreetRequest{
Name: "elza",
}))
require.Error(t, err)
require.Equal(t, connect.CodeOf(err), connect.CodeUnimplemented)
possibleMetrics := []string{
"namespace_subsystem_connect_client_handled_seconds",
"namespace_subsystem_connect_client_handled_total",
"namespace_subsystem_connect_client_started_total",
"namespace_subsystem_connect_server_handled_seconds",
"namespace_subsystem_connect_server_handled_total",
"namespace_subsystem_connect_server_started_total",
}
count, err := testutil.GatherAndCount(reg, possibleMetrics...)
require.NoError(t, err)
require.Equal(t, 3, count, "must report only server side metrics, client-side is disabled")
}