Ocpp: reduce timeouts during testing (evcc-io#7342)

Identifies test using build tags until golang/go#52600 becomes available.

Makefile

@@ -63,7 +63,7 @@ toml:
 
 test::
 	@echo "Running testsuite"
-	CGO_ENABLED=0 go test $(BUILD_TAGS) ./...
+	CGO_ENABLED=0 go test $(BUILD_TAGS),test ./...
 
 porcelain::
 	gofmt -w -l $$(find . -name '*.go')

charger/ocpp.go

@@ -52,8 +52,8 @@ func NewOCPPFromConfig(other map[string]interface{}) (api.Charger, error) {
 	}{
 		Connector:      1,
 		IdTag:          defaultIdTag,
-		ConnectTimeout: 2 * time.Minute,
-		Timeout:        2 * time.Minute,
+		ConnectTimeout: ocppConnectTimeout,
+		Timeout:        ocppTimeout,
 	}
 
 	if err := util.DecodeOther(other, &cc); err != nil {

charger/ocpp_timeout.go

@@ -0,0 +1,10 @@
+//go:build !test
+
+package charger
+
+import "time"
+
+const (
+	ocppConnectTimeout = 5 * time.Minute
+	ocppTimeout        = 2 * time.Minute
+)

charger/ocpp_timeouttest.go

@@ -0,0 +1,10 @@
+//go:build test
+
+package charger
+
+import "time"
+
+const (
+	ocppConnectTimeout = 1 * time.Second
+	ocppTimeout        = 1 * time.Second
+)

charger/tags_test.go

@@ -0,0 +1,10 @@
+//go:build !test
+
+package charger
+
+import "log"
+
+// TODO remove when https://github.com/golang/go/issues/52600 becomes available
+func init() {
+	log.Fatal("running a test without -tags test")
+}

util/templates/includes/ocpp.tpl

@@ -9,6 +9,10 @@ connector: {{ .connector }}
 {{- if .idtag }}
 idtag: {{ .idtag }}
 {{- end }}
+{{- if ne .connecttimeout "5m" }}
 connecttimeout: {{ .connecttimeout }}
+{{- end }}
+{{- if ne .timeout "2m" }}
 timeout: {{ .timeout }}
 {{- end }}
+{{- end }}