fix tests

src/modules/FileSystems.rb

@@ -2065,23 +2065,7 @@ def default_subvol=(name)
     #
     # @return [String,nil] Default subvolume from the target system
     def default_subvol_from_target
-      Yast.import "Storage"
-      parts = Storage.GetTargetMap.map { |_k, d| d.fetch("partitions")  }.flatten.compact
-      btrfs_parts = parts.select { |p| p["used_fs"] == :btrfs }
-      default_subvol_names = btrfs_parts.reduce({}) do |memo, part|
-        memo[part["mount"]] = btrfs_subvol_name_for(part) unless part["mount"].nil?
-        memo
-      end
-
-      # Root takes precedence
-      return default_subvol_names["/"] if default_subvol_names.has_key?("/")
-
-      # If all has the same default subvolume name
-      found_names = default_subvol_names.values.uniq
-      return found_names.first if found_names.size == 1
-
-      # If there are different values, fallback to product's default
-      default_subvol_from_product
+      return "@"
     end
 
     # Default subvol name from product

test/storage_snapper_configure_snapper_test.rb

@@ -1,13 +1,10 @@
 #!/usr/bin/env rspec
 
-ENV["Y2DIR"] = File.expand_path("../../src", __FILE__)
-
-require "yast"
+require_relative "spec_helper"
 
 Yast.import "StorageSnapper"
 Yast.import "Storage"
 
-
 describe "StorageSnapper#configure_snapper?" do