MM-11175 Add logic to server to understand markdown images with dimensions (#9159)

app/post_test.go

@@ -295,6 +295,14 @@ func TestImageProxy(t *testing.T) {
 			assert.Equal(t, "![foo]("+tc.ImageURL+")", th.App.PostWithProxyRemovedFromImageURLs(post).Message)
 			post.Message = "![foo](" + tc.ProxiedImageURL + ")"
 			assert.Equal(t, "![foo]("+tc.ImageURL+")", th.App.PostWithProxyRemovedFromImageURLs(post).Message)
+
+			if tc.ImageURL != "" {
+				post.Message = "![foo](" + tc.ImageURL + " =500x200)"
+				assert.Equal(t, "![foo]("+tc.ProxiedImageURL+" =500x200)", th.App.PostWithProxyAddedToImageURLs(post).Message)
+				assert.Equal(t, "![foo]("+tc.ImageURL+" =500x200)", th.App.PostWithProxyRemovedFromImageURLs(post).Message)
+				post.Message = "![foo](" + tc.ProxiedImageURL + " =500x200)"
+				assert.Equal(t, "![foo]("+tc.ImageURL+" =500x200)", th.App.PostWithProxyRemovedFromImageURLs(post).Message)
+			}
 		})
 	}
 }