Consolidate testing of update_all type casting

We have several test cases on "tricky" types that are essentially
testing that `update_all` goes through the same type casting behavior as
a normal assignment + save. We recently had another case to add this
test for another type in https://github.com/rails/rails/pull/12742.

Rather than testing this separately for every type which is "tricky"
when round tripping, let's instead have a fairly exhaustive test that
ensures we're getting the correct values at every step for `update_all`.
Given the structure of the code now, we can be confident that if the
type is correct, and `update_all` is type casting correctly, we're going
to get the right behavior for all types.

1 files changed, 0 insertions, 10 deletions

diff --git a/activerecord/test/cases/adapters/postgresql/array_test.rb b/activerecord/test/cases/adapters/postgresql/array_test.rb
index a51d5e9d31..70585e0148 100644
--- a/activerecord/test/cases/adapters/postgresql/array_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/array_test.rb
@@ -192,16 +192,6 @@ class PostgresqlArrayTest < ActiveRecord::TestCase
     assert_equal("[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, ...]", record.attribute_for_inspect(:ratings))
   end
 
-  def test_update_all
-    pg_array = PgArray.create! tags: ["one", "two", "three"]
-
-    PgArray.update_all tags: ["four", "five"]
-    assert_equal ["four", "five"], pg_array.reload.tags
-
-    PgArray.update_all tags: []
-    assert_equal [], pg_array.reload.tags
-  end
-
   def test_escaping
     unknown = 'foo\\",bar,baz,\\'
     tags = ["hello_#{unknown}"]