The author of the post agrees with you that library code is different: > I should mention that almost all of my open source projects have 100% code coverage. T

The author of the post agrees with you that library code is different: > I should mention that almost all of my open source projects have 100% code coverage. This is because most of my open source projects are smaller libraries and tools that are reusable in many different situations (a breakage could lead to a serious problem in a lot of consuming projects) and they’re relatively easy to get 100% code coverage on anyway.