L1
Honest Take — Before You Begin
Honest reflections on what tests actually mean and what they cost
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Course · 6 lessons
~48 hr
Intermediate
Testing Mastery
Move from "I write tests" to "I design test architectures" — understanding test design, test doubles, test speed, what to test, what not to test, and how to build a test suite that enables confident refactoring.
reading · we frame, you read MIT or the canonical
taught · we author, no canonical fits
↺ spirals back to earlier lessons
Course locked
Complete ActiveRecord & Database Mastery first.
This course unlocks once you've finished its prerequisite. Open prerequisite →
L2
Read: Effective Testing with RSpec 3 (Marston & Dees)
Approach: READ cover-to-cover
primary
Sandi Metz: "The Magic Tricks of Testing"
locked
L3
Read: Rails 5 Test Prescriptions (Rappin)
Approach: SELECTIVE: test design, system tests, mocking strategy chapters
primary
Sandi Metz: "The Magic Tricks of Testing"
locked
L4
Read: Test Driven Development in Ruby
Approach: READ cover-to-cover
primary
Sandi Metz: "The Magic Tricks of Testing"
locked
L5
Module Checklist
Work through each item before the checkpoint.
locked
L6
Checkpoint: Audit the largest test suite you have access to (a work a...
Audit the largest test suite you have access to (a work app, a gem, or a side project). Identify: tests that are too slow, tests that test implementation instead of behavior, miss…
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6 lessons. Read in order; spiral back when you need to. By the end you'll have used the core ideas twice — once on the abstract, once on something you'll meet at work next week.