Testing Legacy Healthcare Software Without Drowning in Test Cases
TL;DR
Healthcare legacy apps explode a persona × workflow × client matrix that hand-written Playwright/Selenium cannot keep up with. You need characterization-style coverage, not blank-file TDD. DevAssure O2 generates diff-scoped, persona-aware PR tests — humans still review; selectors stop owning the sprint.
Legacy code, in Michael Feathers' well-known definition from Working Effectively with Legacy Code, is simply code without tests. Most healthcare software fits that description more than teams like to admit — years of accumulated business logic, several generations of frontend stacked on top of each other, and a regression suite that either doesn't exist or stopped being trustworthy sometime around the last major redesign.
That's a hard enough problem for a typical B2B app. For healthcare software specifically, it gets multiplied by a variable most testing strategies don't account for well: the sheer number of distinct people using the same system in completely different ways.