testit 1.2

• Global test helpers shared across subdirectories can be placed in a sibling helpers/ directory (e.g., tests/helpers/), where all .R files are sourced before any test runs.

• Added has_match() to test whether a string matches a regular expression. Unlike grepl(), it collapses a character vector into a single string, enables the dotall flag by default (so . also matches newlines), and shows the actual string in the failure message when used inside assert(). Use negate = TRUE to test that a string does not match.

• Fixed a bug where diagnostic information from a comparison (such as %==%) that did not itself cause a test failure could leak into the failure message of a later check. Diagnostics are now scoped to the () check being evaluated.

• () test conditions inside assert('fact', { ... }) now also work inside a {} block passed as an argument to a function call, e.g. xfun::in_dir(dir, { (x %==% y) }). Previously such () expressions were silently treated as ordinary grouping parentheses and never checked, so a failing condition inside the block would not fail the test. As before, only statement-level () is treated as a test; parentheses used for grouping within an expression (e.g., (a + b) * c) are not affected.