[testtools] Add tooling for publish test

testtools/testtools_test.go

@@ -0,0 +1,29 @@
+package testtools
+
+import (
+	"github.com/cyrilix/robocar-base/mqttdevice"
+	"testing"
+)
+
+func TestFakePublisher_Publish(t *testing.T) {
+	p := NewFakePublisher()
+
+	cases := []struct {
+		topic string
+		topicPublished string
+		value mqttdevice.MqttValue
+		expected string
+	}{
+		{"test/topic1", "test/topic1", mqttdevice.NewMqttValue(1) , "1" },
+		{"test/topic2", "test/invalid", mqttdevice.NewMqttValue(1) , "" },
+	}
+
+	for _, c := range cases{
+		p.Publish(c.topic, c.value)
+		val := p.PublishedEvent(c.topicPublished)
+		if v, _ := val.StringValue(); v != c.expected {
+			t.Errorf("FakePublisher.Publish(%v, %v): %v, wants %v", c.topic, string(c.value), v, c.expected)
+		}
+
+	}
+}