Mock the Wire
Part 7 of Getting Started with Mocks: a fake HTTP server finally runs the real client, so paths, headers, and parsing get tested. Java, Node, Go, Python.
Posts by Matt LeRay
Co-founder and CTO of Speedscale, expert in Agentic AI and cloud data warehousing. • 9 posts published
Test Behavior, Not Choreography
Part 5 of Getting Started with Mocks: a test that pinned the retry schedule broke on a change no customer could notice. Here is how to rewrite it.
They Aren't All Mocks
Part 6 of Getting Started with Mocks: stub, spy, fake, mock, and dummy, sorted by what each one does. Java, Node, Go, Python.
What Mocks Are Actually For
Part 1 of Getting Started with Mocks: the one job a mock does, the five situations where you need one, and what a green mocked test does not prove.
When Handwritten Mocks Stop Scaling
Part 9 of Getting Started with Mocks: a decision framework for stubs, fakes, fake servers, mock servers, record-and-replay, and real dependencies.
Your First Useful Mock
Part 2 of Getting Started with Mocks: a test you cannot write, one seam, and the smallest mock that makes a delayed package happen. Java, Node, Go, Python.
Your Mock Is Lying
Part 8 of Getting Started with Mocks: the carrier renames a field, production breaks, and every mocked test still passes. Java, Node, Go, Python.
The Compounding Platform Tax
Security controls rarely break a banking platform alone. Their cumulative divergence from Kubernetes standards creates a compounding maintenance tax.
Application Level Dependency Chaos Testing
A scoped chaos rule takes one dependency down and nothing else, so the fallback branch in your code executes on demand instead of during an outage.
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