Raise an error when loading all fixtures from nil fixture_path

[Gannon McGibbon + Max Albrecht]

1 files changed, 16 insertions, 0 deletions

diff --git a/activerecord/test/cases/fixtures_test.rb b/activerecord/test/cases/fixtures_test.rb
index 5d5f54ca66..82ca15b415 100644
--- a/activerecord/test/cases/fixtures_test.rb
+++ b/activerecord/test/cases/fixtures_test.rb
@@ -1344,3 +1344,19 @@ class SameNameDifferentDatabaseFixturesTest < ActiveRecord::TestCase
     assert_kind_of OtherDog, other_dogs(:lassie)
   end
 end
+
+class NilFixturePathTest < ActiveRecord::TestCase
+  test "raises an error when all fixtures loaded" do
+    error = assert_raises(StandardError) do
+      TestCase = Class.new(ActiveRecord::TestCase)
+      TestCase.class_eval do
+        self.fixture_path = nil
+        fixtures :all
+      end
+    end
+    assert_equal <<~MSG.squish, error.message
+      No fixture path found.
+      Please set `NilFixturePathTest::TestCase.fixture_path`.
+    MSG
+  end
+end