Add end-to-end smoke driving the real CLI against the containerized fake

internal/fakeredmine/fakeredmine.go

@@ -126,14 +126,32 @@ type Status struct {
 // New starts a fake on a random port with Redmine's default
 // enumerations and an empty MOPAC project.
 func New(apiKey string) *Server {
-	s := &Server{
-		APIKey:     apiKey,
-		apiKeySet:  true,
-		issues:     map[int]*Issue{},
-		versions:   map[int]Version{},
+	s := newServer(apiKey)
+	mux := http.NewServeMux()
+	mux.HandleFunc("/", s.handler)
+	s.srv = httptest.NewServer(mux)
+	s.URL = s.srv.URL
+	return s
+}
+
+// ListenAndServe runs the fake on a fixed address (the smoke run boots it
+// in a container). An empty apiKey disables auth checking.
+func ListenAndServe(addr, apiKey string) error {
+	s := newServer(apiKey)
+	mux := http.NewServeMux()
+	mux.HandleFunc("/", s.handler)
+	return http.ListenAndServe(addr, mux)
+}
+
+func newServer(apiKey string) *Server {
+	return &Server{
+		APIKey:    apiKey,
+		apiKeySet: true,
+		issues:    map[int]*Issue{},
+		versions:  map[int]Version{},
 		categories: map[int]Category{},
-		relations:  map[int]Relation{},
-		nextID:     100,
+		relations: map[int]Relation{},
+		nextID:    100,
 		Trackers: []IDName{
 			{1, "Bug"}, {2, "Feature"}, {3, "Support"}, {4, "Task"},
 		},
@@ -145,11 +163,6 @@ func New(apiKey string) *Server {
 			{1, "Low"}, {2, "Normal"}, {3, "High"}, {4, "Urgent"}, {5, "Immediate"},
 		},
 	}
-	mux := http.NewServeMux()
-	mux.HandleFunc("/", s.handler)
-	s.srv = httptest.NewServer(mux)
-	s.URL = s.srv.URL
-	return s
 }
 
 // Close shuts the fake down.