feature-flag-test-matrix-reference

Overview

A codebase with N feature flags, each having M variants, and users in K segments, has N × M × K possible flag-state-segment combinations. At realistic numbers (50 flags, 2 variants each, 5 segments) that's 500 - and at 50 flags with 3 variants and 10 segments, it's 1500. Testing every combination is infeasible, so the matrix has to be sampled deliberately rather than enumerated.

This skill is both the reference (the combinatorics + strategies below) and the coverage-suite-building workflow (see Building the coverage suite); the per-SDK test mechanics live in launchdarkly-testing and openfeature-sdk-testing.

When to use