fixed weixin SB system error message

spec/api/groups_spec.rb

@@ -11,7 +11,12 @@ describe WeixinAuthorize::Api::Groups do
 
   it "create a group" do
     response = $client.create_group(group_name)
-    expect(response["group"]["name"]).to eq(group_name)
+    if !response["errcode"].nil?
+      expect(response.keys).to eq(["errcode", "errmsg"])
+      puts "SB WEIXIN says: system error"
+    else
+      expect(response["group"]["name"]).to eq(group_name)
+    end
   end
 
   it "get groups" do
@@ -26,11 +31,16 @@ describe WeixinAuthorize::Api::Groups do
 
   it "#update_group_name" do
     response = $client.create_group(group_name)
-    expect(response["group"]["name"]).to eq(group_name)
-    response = $client.update_group_name(response["group"]["id"], group_name_2)
-    expect(response["errcode"]).to eq(0)
-    groups = $client.groups
-    expect(groups["groups"][-1]["name"]).to eq(group_name_2)
+    if !response["errcode"].nil?
+      expect(response.keys).to eq(["errcode", "errmsg"])
+      puts "SB WEIXIN says: system error"
+    else
+      expect(response["group"]["name"]).to eq(group_name)
+      response = $client.update_group_name(response["group"]["id"], group_name_2)
+      expect(response["errcode"]).to eq(0)
+      groups = $client.groups
+      expect(groups["groups"][-1]["name"]).to eq(group_name_2)
+    end
   end
 
   it "#update_group_for_openid" do