[ActiveRecord 5.2 Test Failure] test/cases/adapters/postgresql/numbers_test.rb about activerecord-cockroachdb-adapter HOT 1 OPEN

Per #124, the following assertion fails:

assert_equal ::Float::INFINITY, second.double

Failure:
PostgresqlNumberTest#test_values [/Users/alimi/repos/rails/activerecord/test/cases/adapters/postgresql/numbers_test.rb:35]:
Expected: Infinity
  Actual: 0.0

This test fails specifically because Infinity is being cast to 0.0 when inserted into the database as a double-precision Float. Interestingly, -Infinity is handled correctly.

Calling the following in an interactive debugging session suggests that the issue may not lie with Active Record:

$ second.attributes_before_type_cast
{"id"=>2, "single"=>-Infinity, "double"=>0.0}

Both PG and CockroachDB use the IEEE 754 standard for handling special cases Infinity and -Infinity.

from activerecord-cockroachdb-adapter.