vindvaki / netzke-pg-tests

README

A proof of concept netzke component with a testcase that breaks pagination under postgresql (at the time of writing), due to the behavior of limit by ... offset ... under postgres

The basic test case is:

• An app with one model, Author(id, name, created_at, updated_at)
• One Netzke::Basepack::Grid, Authors, of Author records, sorted by the name column by default
• A test that generates a bunch of Author instances, all with the same name (so postgres can sort however it wants), loads the Authors grid and compares the entries in the grid with the entries generated. On my machine, this usually results in a few missed entries.

Example

Running

$ bundle exec rspec

can give results along the lines of

F

Failures:

 1) Authors should not show the same record on two different pages
    Failure/Error: run_mocha_spec 'authors'
    RuntimeError:
      Failures:
      1) should not show the same record on two different pages
      Error: Error: expected [ 4,
        95,
        152,
        196,
        215,
        372,
        411,
        569,
        597,
        610,
        616,
        723,
        788,
        855,
        910 ] to sort of equal [] (http://127.0.0.1:42643/assets/netzke/testing/expect/expect.js:99)
    # ./spec/features/authors_spec.rb:11:in `block (2 levels) in <top (required)>'

Finished in 38.39 seconds (files took 2.36 seconds to load)
1 example, 1 failure

Failed examples:

rspec ./spec/features/authors_spec.rb:10 # Authors should not show the same record on two different pages

demonstrating the issue, but can

Files of interest

• spec/features/author_spec.rb, and
• spec/features/javascripts/authors.js.coffee

(the rest is just boilerplate for Rails, included for the sake of reproducibility)

Other notes

You'll need to set up PostgreSQL in config/database.yml.

Like for any netzke project:

• public/extjs should link to ExtJS (I used 5.1.1 GPL)
• public/images/icons should link to the famfam silk icons