APACHE SPARK & DATA ENGINEERING · DAY 039
Data quality checks: a practical Spark & Data Eng guide
Expona Admin · Oct 27, 2026 · 10 min read
Tag · 460 articles · 1 interview series
#Testing
Practical Testing articles, guides and code examples from the Expona engineering blog.
Articles
460 articles
APACHE SPARK & DATA ENGINEERING · DAY 040
Deduplication strategies for Spark & Data Eng developers
Expona Admin · Oct 27, 2026 · 8 min read
APACHE SPARK & DATA ENGINEERING · DAY 041
Window functions in Spark: practical tips and trade-offs
Expona Admin · Oct 27, 2026 · 5 min read
APACHE SPARK & DATA ENGINEERING · DAY 049
dbt for transformations: real-world lessons and examples
Expona Admin · Oct 27, 2026 · 8 min read
APACHE SPARK & DATA ENGINEERING · DAY 056
Testing Spark pipelines: real-world lessons and examples
Expona Admin · Oct 27, 2026 · 7 min read
APACHE SPARK & DATA ENGINEERING · DAY 058
CI/CD for data pipelines for Spark & Data Eng developers
Expona Admin · Oct 27, 2026 · 7 min read
APACHE SPARK & DATA ENGINEERING · DAY 081
Data engineering career tips: what developers should know
Expona Admin · Oct 27, 2026 · 7 min read
APACHE SPARK & DATA ENGINEERING · DAY 097
Writing Spark jobs for reuse: what developers should know
Expona Admin · Oct 27, 2026 · 7 min read
RUBY ON RAILS · DAY 001
Why Ruby on Rails in 2026: practical tips and trade-offs
Expona Admin · Oct 27, 2026 · 7 min read
RUBY ON RAILS · DAY 038
Testing in Rails: Ruby on Rails best practices explained
Expona Admin · Oct 27, 2026 · 9 min read
RUBY ON RAILS · DAY 039
RSpec vs Minitest: Ruby on Rails lessons from production
Expona Admin · Oct 27, 2026 · 5 min read
RUBY ON RAILS · DAY 040
System tests with Capybara: patterns, pitfalls and fixes
Expona Admin · Oct 27, 2026 · 7 min read
RUBY ON RAILS · DAY 041
FactoryBot for test data: a hands-on guide for engineers
Expona Admin · Oct 27, 2026 · 7 min read
RUBY ON RAILS · DAY 060
Payments with Pay and Stripe for Ruby on Rails developers
Expona Admin · Oct 27, 2026 · 6 min read
RUBY ON RAILS · DAY 066
Rails upgrades: Ruby on Rails best practices explained
Expona Admin · Oct 27, 2026 · 6 min read
RUBY ON RAILS · DAY 084
Rails developer roadmap: a practical Ruby on Rails guide
Expona Admin · Oct 27, 2026 · 7 min read
RUBY ON RAILS · DAY 090
Query objects: concepts, trade-offs and production lessons
Expona Admin · Oct 27, 2026 · 7 min read
RUBY ON RAILS · DAY 095
Parallel testing in Rails: practical tips and trade-offs
Expona Admin · Oct 27, 2026 · 7 min read
RUBY ON RAILS · DAY 097
Mailer testing and previews for Ruby on Rails developers
Expona Admin · Oct 27, 2026 · 7 min read
RUBY ON RAILS · DAY 098
Rails strict loading: a Ruby on Rails guide for developers
Expona Admin · Oct 27, 2026 · 7 min read