Removed deprecated `Arel::Sql::Engine` and make use of `FakeRecord::Base` inplace directly for test helper.

Add tests for Nodes::Equality and Nodes::NotEqual to the ToSql class.

Extract comparison array to a constant for the time being until removing the checks completely.

Bump minitest to 5.1.

PostgreSQL bugfix for invalid SQL in subqueries

Add tests for PostgreSLQ bugfix regarding invalid SQL in subqueries when using matches() or does_not_match().

In commit 68a95542 the last_column feature of ToSql was removed. The visit_Arel_Nodes_Matches and visit_Arel_Nodes_DoesNotMatch methods are overwritten in the PostgreSQL class, but were not updated appropriately. This commit fixes the issue accordingly.

This bug affects at least all update_all statements in Rails 4.0.2 that have subqueries with ILIKE statements on PostgreSQL. The bug is present in Arel 4.0.1 and later, so it probably affects most Rails 4.0.2 projects.

It would be highly appreciated if Arel 4 could get a point release as well. Thanks for your continued work.

Removed EngineProxy in SelectManager tests

Test  against ruby 2.1 on travis.

Assert that SelectManager#project accepts a raw String

Remove README inaccuracy, where does not allow multiple arguments

Documented the case-insensitive nature of the match feature.

Documenting the library's behavior. People and other libraries (cf. Squeel) have come to depend on this behavior, and so am submitting this pull request to specify it authoritatively.

Closes #189

"Relational DataBase Management systems",