Test.Syd.Mutation.TestId

An opaque identifier for a single test in a Spec.

A TestId is stable across runs as long as the spec structure does not change. When two tests share the same description at the same level, a zero-based per-description sibling index is used to distinguish them; the index is omitted when it is zero.

Render a TestId as a human-readable string that is also parseable by parseTestIdFilterArg and usable as the argument to --filter-id.

Steps are separated by .. The index suffix :n (for n > 0) is appended after the description. Literal \, ., and : in descriptions are escaped as \\, \., and \:.

Parse the output of renderTestId back into a TestId. Returns Nothing if the input is malformed or empty.