Feat: GM to private channel

data/test-by-folder.json

@@ -498,7 +498,9 @@
   {
     "folder": "channels/channel-menu",
     "tests": [
+      "Convert a GM to Private channel with users on same team",
       "Leave and Archive channel actions display as destructive",
+      "Throw Error when Converting a GM to Private channel with users from different teams",
       "channels/DMs/GMs move to submenus should have appropriate menu items"
     ]
   },

data/test-cases/channels/channel-menu/test-1.md

@@ -0,0 +1,45 @@
+---
+# (Required) Ensure all values are filled up
+name: "Convert a GM to Private channel with users on same team"
+status: Active
+priority: Normal
+folder: Channel menu
+authors: "@yasserfaraazkhan"
+team_ownership: []
+priority_p1_to_p4: P3 - Deep Functions (Do extensive scenarios work?)
+
+# (Optional)
+location: null
+component: null
+tags: []
+labels: []
+tested_by_contributor: null
+
+# (Optional) Test type and tools
+cypress: null
+detox: null
+mmctl: null
+playwright: null
+rainforest: []
+manual_test_environments: []
+
+# Do not change
+id: null
+key: null
+created_on: null
+last_updated: null
+case_hashed: null
+steps_hashed: null
+---
+
+**Step 1**
+
+1. Login into mattermost.
+2. Create a GM channel with users between 2 to 7 from same team.
+3. Post a message.
+4. From the Channel menu, click on 'Convert to Private Channel'.
+5. Verify User can see a pop up, with a heading `Convert to Private Channe` and an alert message `Conversation history will be visible to any channel members`.
+6. Verify User can enter a Channel name and Select Team from the dropdown (this dropdown won't appear if the users are in just 1 team).
+7. Click on Create a Private Channel.
+8. Verify the created channel is a Private channel.
+9. Verify the Post is still in the channel after conversion.

data/test-cases/channels/channel-menu/test-2.md

@@ -0,0 +1,43 @@
+---
+# (Required) Ensure all values are filled up
+name: "Throw Error when Converting a GM to Private channel with users from different teams"
+status: Active
+priority: Normal
+folder: Channel menu
+authors: "@yasserfaraazkhan"
+team_ownership: []
+priority_p1_to_p4: P3 - Deep Functions (Do extensive scenarios work?)
+
+# (Optional)
+location: null
+component: null
+tags: []
+labels: []
+tested_by_contributor: null
+
+# (Optional) Test type and tools
+cypress: null
+detox: null
+mmctl: null
+playwright: null
+rainforest: []
+manual_test_environments: []
+
+# Do not change
+id: null
+key: null
+created_on: null
+last_updated: null
+case_hashed: null
+steps_hashed: null
+---
+
+**Step 1**
+
+1. Login into mattermost.
+2. Create 2 teams and have users assigned to them.
+3. Create a GM channel with users between 2 to 7, and they should be from different team.
+4. From the Channel menu, click on 'Convert to Private Channel'.
+5. Verify User can see a pop up, with a heading `Convert to Private Channe` and an alert message `Unable to convert to a channel because group members are part of different teams`.
+
+![Screenshot](/data/asset/Error_converting_GM.png)