I wrote a brief Mix.install-based “tour” of Mneme for folks who might want to try it out without having to add anything to a project. The code can be found here. To give it a try, just download and run using elixir! (requires Elixir 1.14+)
curl -o tour_mneme.exs https://raw.githubusercontent.com/zachallaun/mneme/main/examples/tour_mneme.exs
elixir tour_mneme.exs
Really nice idea to ease the testing part! I will try it in the next days.
Thank you for your contribution @zachallaun !
This release should be very small in terms of visible changes, but adds a number of quality-of-life enhancements and fixes numerous edge-cases related to pattern generation (thanks to stream_data!).
Mneme is now also tested against Elixir 1.14.4 with OTP 26.0. It should be working with Elixir 1.15.0-rc.0 as well, but a small bug is preventing tests from passing, but I’ll hold off on saying it’s compatible for sure 
This is a small release that primarily consists of internal changes & refactoring, though it also fixes a couple of minor bugs with Elixir 1.15+, including the use of multi-character sigils.
Mneme is now tested against Elixir 1.15.1 and Erlang/OTP 26.0.2, so you should feel confident if using the latest and greatest!
This release introduces one breaking change: config :mneme, ... is now replaced by passing options directly to Mneme.start/1 when you wish to apply the options to the entire test run. If you weren’t using Mneme’s application config previously, you do not need to change anything. If you were, please see the changelog above for an example.
While I’m at it, here’s a funny little snippet that shows how Mneme can be used to (almost) delete itself, replacing all existing auto_assert* with regular assert*:
Mneme.start(
target: :ex_unit,
force_update: true,
action: :accept
)
There’s been a small flurry of bugfixes and qualify-of-life improvements in the last week. Special thanks to @tcoopman for the reports!
A special request: If you find any weird behavior when using Mneme with the Elixir 1.16 release candidates, please file an issue! Some light initial testing suggests that everything should be working as normal, but I’d love to make sure that Mneme doesn’t hold anyone back from upgrading!
Great library! I would love to have an interactive credo fixer and compiler warning fixer. Will take a look at the source for Mneme for inspiration.
In addition to a handful of bug fixes, the main change this release is that Mneme will no longer generate empty maps as suggested patterns; in practice, these were not useful and often led to an explosion of suggestions, especially with nested maps. For instance:
auto_assert %{foo: %{bar: :baz}}
# would previously suggest all of:
auto_assert %{} <- %{foo: %{bar: :baz}}
auto_assert %{foo: %{}} <- %{foo: %{bar: :baz}}
auto_assert %{foo: %{bar: :baz} <- %{foo: %{bar: :baz}}
# but will now only suggest:
auto_assert %{foo: %{bar: :baz} <- %{foo: %{bar: :baz}}