IPO

In-Parameter-Order generation: builds a covering array incrementally, extending coverage one parameter at a time.

OSWindows · macOS · Linux

BrowserChrome · Firefox

AuthOAuth · SAML

Parameters (CSV)

First row = parameter names; each column below lists that parameter's values.

Interaction strength (t)

t = 2pairwise · max 3

Step 1 of 9

Seeded the array with the 6 exhaustive combinations of the first 2 parameters (OS, Browser).

Strength

t = 2

Tests

Integrated

2 / 3

Uncovered

▶Algorithm

IPOG(parameters, t):
tests ← all t-tuples of the first t parameters
for each remaining parameter p:
π ← t-way tuples involving p and prior params
horizontal growth:
extend each test with the value of p covering the most of π
vertical growth:
for each tuple left in π, reuse a test or add a new one
return tests

Interaction coverage6 / 16 covered (38%)

Seed

Covering array (6 tests)

#	OS	Browser	Auth
1	Windows	Chrome	·
2	Windows	Firefox	·
3	macOS	Chrome	·
4	macOS	Firefox	·
5	Linux	Chrome	·
6	Linux	Firefox	·

1 / 9Speed