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Diffstat (limited to 'activerecord/test/cases/relations_test.rb')
-rw-r--r-- | activerecord/test/cases/relations_test.rb | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/activerecord/test/cases/relations_test.rb b/activerecord/test/cases/relations_test.rb index ddfcaaf986..d054dfa25a 100644 --- a/activerecord/test/cases/relations_test.rb +++ b/activerecord/test/cases/relations_test.rb @@ -14,6 +14,7 @@ require 'models/car' require 'models/engine' require 'models/tyre' require 'models/minivan' +require 'models/aircraft' class RelationTest < ActiveRecord::TestCase @@ -365,6 +366,16 @@ class RelationTest < ActiveRecord::TestCase assert_equal({ 'salary' => 100_000 }, Developer.none.where(salary: 100_000).where_values_hash) end + + def test_null_relation_count + ac = Aircraft.new + assert_equal Hash.new, ac.engines.group(:id).count + assert_equal 0, ac.engines.count + ac.save + assert_equal Hash.new, ac.engines.group(:id).count + assert_equal 0, ac.engines.count + end + def test_joins_with_nil_argument assert_nothing_raised { DependentFirm.joins(nil).first } end |