lein-nashtest

Run CLJS tests in nashorn using cljs.test report hooks.

Motivation

nashtest has two primary goals;

1. eliminate external dependencies (e.g. node, phantomjs, etc).
2. “clean” instrumentation of cljs.test/no third-party macros (e.g. deftest, defrunner, etc).

Limitations

• ECMAScript support is limited to Nashorns capabilities.
  • DOM support is not available (e.g. document.* is absent).
  • XMLHTTPRequest is not available.
  • Timers are not available.
  • Optimal target is ECMAScript 5.1.

Happy to accept PR’s if people want to provide shims.

Requirements

• Java 8.
• Leiningen 2.7.1+.
• lein-cljsbuild 1.1.7+. (whitespace optimised target)

Basic Usage

Single Execution

Single execution is intended for use in CI or as a precommit verification. If there are test failures the exit code will be 1, if all is green it will be 0.

$ lein nashtest
Testing jbx.events-test
Ran 1 tests containing 12 assertions.
0 failures, 0 errors.

Watch Loop Execution

Watch loop execution is intended for continuous feedback during development. A change to the :load-js file will result in automatic execution of the whole test suite.

$ lein nashtest watch
Watching for changes to test.js
Testing jbx.events-test
Ran 1 tests containing 12 assertions.
0 failures, 0 errors.

Installation

1) Add the plugin to your leiningen project.clj file.

  :plugins [[lein-nashtest "0.1.3"]]

2) Configure your cljsbuild test target in project.clj.

   :cljsbuild [{:id "test"
                :source-paths ["src/cljs" "src/cljc" "test/cljs"]
                :figwheel true
                :compiler {:language-in :ecmascript5-strict
                           :language-out :ecmascript5-strict
                           :optimizations :whitespace
                           :main jbx.runner
                           :asset-path "js/test"
                           :output-to  "target/cljsbuild/public/js/test.js"
                           :cache-analysis true}]

Note: Whitespace optimisation is required because document.write().

3) Create a cljs.test runner.

(ns jbx.runner
  (:require
    [cljs.test :as t :include-macros true]
    [jbx.events-test]))
(defn ^:export run
  []
  (enable-console-print!)
  (t/run-all-tests #"jbx.*-test"))

Note: nashtest uses :test-main or :runner and will call your exported function as part of the test cycle. Do not include a call to the function at the bottom of your runner file.

4) Configure nashtest with a root key in project.clj.

  :nashtest {:load-js "test.js"
             :test-main "jbx.runner/run"}

Planned Work

1. Introduce :test-main which would use Clojure style references (e.g. jbx.runner/run). #1
2. File watcher. #2
3. Inject cljs.test/report defmethod from runner. #3
4. Allow for multiple nashtest ids/targets.
5. JUnit XML output.
6. Naive document.write and