feat(social): add listening activity, shared rooms and modern chat

services/api/internal/wave/friends_test.go

@@ -0,0 +1,16 @@
+package wave
+
+import (
+	"github.com/stretchr/testify/require"
+	"testing"
+)
+
+func TestFriendMixRemainsMinorityAndDoesNotDuplicate(t *testing.T) {
+	original := []Pick{{ID: "one"}, {ID: "two"}, {ID: "three"}, {ID: "four"}, {ID: "five"}}
+	mixed := blendFriendPick(original, []string{"one", "friend"})
+	require.Len(t, mixed, 5)
+	require.Equal(t, "friends", mixed[4].Source)
+	require.Equal(t, "friend", mixed[4].ID)
+	require.Equal(t, "five", original[4].ID)
+	require.Equal(t, original, blendFriendPick(original, []string{"one"}))
+}