chore: add MaxACPower test (#19285)

meter/battery_power.go

@@ -4,6 +4,8 @@ type maxpower struct {
 	MaxACPower float64
 }
 
+// var _ api.MaxACPowerGetter = (*maxpower)(nil)
+
 // MaxACPowerDecorator returns the max AC power decorator
 func (m *maxpower) Decorator() func() float64 {
 	if m.MaxACPower == 0 {

meter/meter_test.go

@@ -0,0 +1,30 @@
+package meter
+
+import (
+	"context"
+	"testing"
+
+	"github.com/evcc-io/evcc/api"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestACPower(t *testing.T) {
+	m, err := NewConfigurableFromConfig(context.TODO(), map[string]any{
+		"capacity": 23,
+		"soc": map[string]any{
+			"source": "const",
+			"value":  47,
+		},
+		"maxacpower": 1000,
+		"power": map[string]any{
+			"source": "const",
+			"value":  1000,
+		},
+	})
+	require.NoError(t, err)
+	_, ok := m.(api.BatteryCapacity)
+	assert.True(t, ok, "api.BatteryCapacity")
+	_, ok = m.(api.MaxACPowerGetter)
+	assert.True(t, ok, "api.MaxACPowerGetter")
+}