common: rabbit refactor

Generalize interface to allow processing of any events, not just
Gitea events.

common/rabbitmq_test.go

@@ -0,0 +1,101 @@
+package common
+
+import (
+	"net/url"
+	"slices"
+	"testing"
+)
+
+func TestListenDefinitionsTopicUpdate(t *testing.T) {
+
+	tests := []struct {
+		name         string
+		handlers     []string
+		orgs1, orgs2 []string
+
+		topicDelta []string
+	}{
+		{
+			name: "no handlers, no orgs",
+		},
+		{
+			name:       "adding one org",
+			handlers:   []string{"foo"},
+			orgs2:      []string{"NewOrg"},
+			topicDelta: []string{"+suse.src.NewOrg.foo.#"},
+		},
+		{
+			name:       "adding two orgs",
+			handlers:   []string{"foo", "bar"},
+			orgs1:      []string{"old"},
+			orgs2:      []string{"old", "NewOrg", "NewOrg2"},
+			topicDelta: []string{"+suse.src.NewOrg.foo.#", "+suse.src.NewOrg2.foo.#", "+suse.src.NewOrg.bar.#", "+suse.src.NewOrg2.bar.#"},
+		},
+		{
+			name:       "adding one org and removing old one",
+			handlers:   []string{"foo", "bar"},
+			orgs1:      []string{"old"},
+			orgs2:      []string{"NewOrg"},
+			topicDelta: []string{"+suse.src.NewOrg.foo.#", "+suse.src.NewOrg.bar.#", "-suse.src.old.foo.#", "-suse.src.old.bar.#"},
+		},
+		{
+			name:       "adding one org and removing old one",
+			handlers:   []string{"foo", "bar"},
+			orgs1:      []string{"NewOrg"},
+			orgs2:      []string{"old"},
+			topicDelta: []string{"-suse.src.NewOrg.foo.#", "-suse.src.NewOrg.bar.#", "+suse.src.old.foo.#", "+suse.src.old.bar.#"},
+		},
+	}
+
+	u, _ := url.Parse("amqps://rabbit.example.com")
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			l := &RabbitMQGiteaEventsProcessor{
+				Orgs:     test.orgs1,
+				Handlers: make(map[string]RequestProcessor),
+				c: &RabbitConnection{
+					RabbitURL:       u,
+					topicSubChanges: make(chan string, len(test.topicDelta)*10),
+				},
+			}
+
+			slices.Sort(test.topicDelta)
+
+			for _, r := range test.handlers {
+				l.Handlers[r] = nil
+			}
+
+			changes := []string{}
+			l.c.UpdateTopics(l)
+		a:
+			for {
+				select {
+				case c := <-l.c.topicSubChanges:
+					changes = append(changes, c)
+				default:
+					changes = []string{}
+					break a
+				}
+			}
+
+			l.Orgs = test.orgs2
+
+			l.c.UpdateTopics(l)
+			changes = []string{}
+
+		b:
+			for {
+				select {
+				case c := <-l.c.topicSubChanges:
+					changes = append(changes, c)
+				default:
+					slices.Sort(changes)
+					break b
+				}
+			}
+			if !slices.Equal(changes, test.topicDelta) {
+				t.Error("got:", changes, " expected:", test.topicDelta)
+			}
+		})
+	}
+}