FEATURE: Check if selectable avatars exist before enabling them (#10032)

spec/components/validators/selectable_avatars_enabled_validator_spec.rb

@@ -0,0 +1,30 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe SelectableAvatarsEnabledValidator do
+  describe '#valid_value?' do
+    subject(:validator) { described_class.new }
+
+    it "returns true when disabling" do
+      SiteSetting.selectable_avatars = ""
+      expect(validator.valid_value?("f")).to eq(true)
+
+      SiteSetting.selectable_avatars = [Fabricate(:image_upload).url, Fabricate(:image_upload).url].join("\n")
+      expect(validator.valid_value?("f")).to eq(true)
+    end
+
+    it "returns true when there are at least two selectable avatars" do
+      SiteSetting.selectable_avatars = [Fabricate(:image_upload).url, Fabricate(:image_upload).url].join("\n")
+      expect(validator.valid_value?("t")).to eq(true)
+    end
+
+    it "returns false when selectable avatars is blank or has one avatar" do
+      SiteSetting.selectable_avatars = ""
+      expect(validator.valid_value?("t")).to eq(false)
+
+      SiteSetting.selectable_avatars = Fabricate(:image_upload).url
+      expect(validator.valid_value?("t")).to eq(false)
+    end
+  end
+end