MM-2954 - Add a separate post type for /me messages and update formatting (#11082)

* MM-2954

* Added new const post type for /me commands
* Modified me command to return response text without *__* wrapper
* Modified unit test for MeCommand to reflect changes
* Added unit test for the me command provider

* * Reverted change to text property in me command response
* Added original message in me command response props
* Updated unit tests

* gofmt changes

app/command_me.go

@@ -34,5 +34,12 @@ func (me *MeProvider) GetCommand(a *App, T goi18n.TranslateFunc) *model.Command
 }
 
 func (me *MeProvider) DoCommand(a *App, args *model.CommandArgs, message string) *model.CommandResponse {
-	return &model.CommandResponse{ResponseType: model.COMMAND_RESPONSE_TYPE_IN_CHANNEL, Text: "*" + message + "*"}
+	return &model.CommandResponse{
+		ResponseType: model.COMMAND_RESPONSE_TYPE_IN_CHANNEL,
+		Type:         model.POST_ME,
+		Text:         "*" + message + "*",
+		Props: model.StringInterface{
+			"message": message,
+		},
+	}
 }

app/command_me_test.go

@@ -0,0 +1,27 @@
+package app
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"github.com/mattermost/mattermost-server/model"
+)
+
+func TestMeProviderDoCommand(t *testing.T) {
+	th := Setup(t).InitBasic()
+	defer th.TearDown()
+
+	mp := MeProvider{}
+
+	msg := "hello"
+
+	resp := mp.DoCommand(th.App, &model.CommandArgs{}, msg)
+
+	assert.Equal(t, model.COMMAND_RESPONSE_TYPE_IN_CHANNEL, resp.ResponseType)
+	assert.Equal(t, model.POST_ME, resp.Type)
+	assert.Equal(t, "*"+msg+"*", resp.Text)
+	assert.Equal(t, model.StringInterface{
+		"message": msg,
+	}, resp.Props)
+}