Add include_num_members support to conversation.info request

conversation.go

@@ -5,6 +5,8 @@ import (
 	"net/url"
 	"strconv"
 	"strings"
+
+	"github.com/pkg/errors"
 )
 
 // Conversation is the foundation for IM and BaseGroupConversation
@@ -372,7 +374,11 @@ func (api *Client) GetConversationInfo(input *GetConversationInfoInput) (*Channe
 // GetConversationInfoContext retrieves information about a conversation with a custom context
 func (api *Client) GetConversationInfoContext(ctx context.Context, input *GetConversationInfoInput) (*Channel, error) {
 	if input == nil {
-		input = &GetConversationInfoInput{}
+		return nil, errors.New("GetConversationInfoInput must not be nil")
+	}
+
+	if input.ChannelID == "" {
+		return nil, errors.New("ChannelID must be defined")
 	}
 
 	values := url.Values{

conversation_test.go

@@ -413,6 +413,28 @@ func TestGetConversationInfo(t *testing.T) {
 	}
 }
 
+func TestGetConversationInfoNilError(t *testing.T) {
+	http.HandleFunc("/conversations.info", okChannelJsonHandler)
+	once.Do(startServer)
+	api := New("testing-token", OptionAPIURL("http://"+serverAddr+"/"))
+	_, err := api.GetConversationInfo(nil)
+	if err == nil {
+		t.Errorf("Unexpected pass where there should have been nil input error")
+		return
+	}
+}
+
+func TestGetConversationInfoMissingChannelError(t *testing.T) {
+	http.HandleFunc("/conversations.info", okChannelJsonHandler)
+	once.Do(startServer)
+	api := New("testing-token", OptionAPIURL("http://"+serverAddr+"/"))
+	_, err := api.GetConversationInfo(&GetConversationInfoInput{})
+	if err == nil {
+		t.Errorf("Unexpected pass where there should have been missing channel error")
+		return
+	}
+}
+
 func leaveConversationHandler(rw http.ResponseWriter, r *http.Request) {
 	rw.Header().Set("Content-Type", "application/json")
 	response, _ := json.Marshal(struct {