Function TestExtractMeta

internal/server/mcp_test.go:1619–1736

(t *testing.T)

}

func TestExtractMeta(t *testing.T) {
	// withTraceContextPropagator registers the W3C trace-context propagator globally
	// for the duration of the test. extractMeta delegates to otel.GetTextMapPropagator,
	// and the default global propagator is a no-op — so without this helper the
	// "extracted" trace context would always be invalid.
	t.Helper()
	prev := otel.GetTextMapPropagator()
	otel.SetTextMapPropagator(propagation.TraceContext{})
	t.Cleanup(func() { otel.SetTextMapPropagator(prev) })

	testCases := []struct {
		name                 string
		body                 []byte
		wantEmptyCtx         bool
		wantValidSpanContext bool
		wantTraceId          string
		wantProtocolVersion  string
		wantTelemetryAttr    *util.TelemetryAttributes
		wantClientName       string
		wantClientVersion    string
	}{
		{
			name:         "empty meta",
			body:         []byte(""),
			wantEmptyCtx: true,
		},
		{
			name:         "not json meta",
			body:         []byte("not json"),
			wantEmptyCtx: true,
		},
		{
			name:         "no _meta",
			body:         []byte(`{"params":{}}`),
			wantEmptyCtx: true,
		},
		{
			name:         "no params",
			body:         []byte(`{"method":"tools/call"}`),
			wantEmptyCtx: true,
		},
		{
			name:         "empty meta",
			body:         []byte(`{"params":{"_meta":{}}}`),
			wantEmptyCtx: true,
		},
		{
			name:                 "traceparent only",
			body:                 []byte(`{"params":{"_meta":{"traceparent":"00-0af7651916cd43dd8448eb211c80319c-b7ad6b7169203331-01"}}}`),
			wantValidSpanContext: true,
			wantEmptyCtx:         true,
		},
		{
			name: "telemetry attributes only",
			body: []byte(`{"params":{"_meta":{"dev.mcp-toolbox/telemetry":{` +
				`"client.name":"toolbox-langchain-python",` +
				`"client.version":"v0.1.0",` +
				`"client.model":"gemini-2.5-flash",` +