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Test runner, report viewer and formatting tool for Midje within Emacs.

Emidje extends Cider to provide support for Midje tests in a similar fashion as cider-test.el does for clojure.test tests. In fact, most of Emidje functionalities were strongly inspired on cider-test.el features.

When installed, Emidje exposes the emidje-mode, an Emacs minor-mode that complements clojure-mode and cider-repl-mode by providing a set of keybindings to interact with Midje facts in a more pleasant way.


Emidje is available on Melpa and Melpa stable, two major package.el community maintained repositories. Soon, the most recommended way of installing Emidje is through package.el, the native Emacs's package manager.

You can install Emidje by typing the following command:

M-x package-install [RET] emidje [RET]

After installing emidje, add the following line to your init.el file in order to enable the automatic injection of the nREPL middleware and activate the emidje-mode whenever you visit a Clojure file or switch to the Cider's REPL buffer:

(eval-after-load 'cider

Alternatively, you can write your own function to add emidje-mode to the desired hooks:

(defun my-clojure-hook ()
"Enable some minor modes to enhance Clojure development."
(eval-after-load 'cider
(add-hook 'clojure-mode-hook #'my-clojure-hook)


Emidje is a nREPL client for midje-nrepl. Therefore, the later must be available in the classpath of your project (see midje-nrepl's documentation for more details).

If you start a REPL via M-x cider-jack-in, you don't need anything else; Emidje will take care of injecting the correct version of midje-nrepl in your REPL through Cider facilities (see installation). However, if you are connecting to a running nREPL process, you need to add midje-nrepl manually either to your project's project.clj, or in the :user profile found at ~/.lein/profiles.clj:

:plugins [[nubank/midje-nrepl "x.x.x"]]

Replace the x.x.x above with the current installed Emidje's version. Notice that those versions should be kept in sync to make sure that the nREPL client and the nREPL middleware are compatible (you will see a warning in the Cider's REPL when those versions don't match).

Starting the REPL and loading facts

By default Emidje prevents Midje facts from being run when a given test namespace is loaded. This means that Midje facts will no longer be checked during the REPL startup or as a side effect of commands like cider-eval-x, cider-load-buffer, cider-refresh, etc. This behavior is extremely useful, mainly on huge projects with heavy and slow integration tests, because it makes the REPL startup faster and more reliable. But, if you are acquainted to run Midje facts with M-x cider-load-buffer (C-c C-k), be aware that by default this will no longer work with Emidje. This should not be a problem since one of the core features of Emidje is a set of keybindings to run facts (more about that below). However, if you want to check facts on commands that load a namespace or a given sexpr, type M-x emidje-toggle-load-facts-on-eval to disable this behavior on the current buffer or C-u M-x emidje-toggle-load-facts-on-eval to disable it globally. Alternatively, you can disable this feature entirely in your init.el as follows:

(setq-default emidje-load-facts-on-eval t)

Running tests

Press C-c C-j n from a source buffer or REPL to run all tests related to the namespace where you are currently in. As cider-test.el does, Emidje employs a customizable inference logic to figure out the test namespace that corresponds to the namespace where you are working on. This means that you can run all tests defined in a given namespace without switching directly to it. Simply press the aforementioned keys from the implementation namespace and Emidje will check its facts. Alternatively, you can call C-u C-c C-j n from any Clojure source file or from the REPL and Emidje will display a list of known test namespaces in the current project. By pressing RET over any of those namespaces, Emidje will run its tests.

Press C-c C-j p to run all tests defined in the project. Alternatively, you can press C-u C-c C-j p and Emidje will show you a list of known test paths for the current project. By pressing RET over any of those paths, Emidje will run all tests defined within the chosen path.

The keybinding C-c C-j r can be used to re-run tests that didn't pass in the last execution. Use C-c C-j t to run the test at point.

Interacting with reports

Test results are displayed in the *midje-test-report* buffer. You can switch to this buffer by pressing C-c C-j s from a clojure namespace or from the REPL. Once in this buffer, you can navigate across test results, jump to test definitions, show stacktraces, etc. Follows a list of keybindings that you have at your disposal:

Keybinding Description
e Show test error and stacktrace
RET or M-. Jump to namespace or test definition at point
n-r Move point to next test result
p-r Move point to previous test result
n-e Move point to next error
p-e Move point to previous error
n-f Move point to next failure
p-f Move point to previous failure

Formatting tabular facts

Move point to the begining of a tabular fact and press C-c C-j f and it will be formatted as a right aligned table.


Type M-x customize-group [emidje] to see a complete list of Emidje variables that can be tweaked.


An extensive changelog is available here.


Copyright © 2018 Nubank

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.