Rename test files to *_test.rb
Whitespace [ci skip]
Remove test check for spatial_expressions_supported?

This check was only necessary before Arel 2.1
Add SetupTest
Use simple array merge to add ignore_tables
Remove unnecessary runtime ActiveRecord version check

The gemspec does this check.
Match code from rails
Whitespace [ci skip]
Remove underscores at end of variable names
Remove underscores at end of variable names
Remove underscores at end of variable names
Remove underscores at end of variable names
Remove underscores at end of variable names
Cleanup tests

* Remove underscores at end of variable names
* Whitespace
Remove underscores at end of variable names