dependency manager: use yarn instead of npm (#90)

.travis.yml

@@ -9,6 +9,7 @@ node_js:
 before_script:
   - node_modules/o-tools-livescript/bin/build
 
+cache: yarn
 
 notifications:
   email: false

CONTRIBUTING.md

@@ -2,7 +2,8 @@
 
 - set up your developer machine:
   - install Node.js
-  - `npm i`
+  - install [yarn](https://yarnpkg.com/en/)
+  - `yarn install`
 
 - development
   - the source code is in `src`

README.md

@@ -53,6 +53,8 @@ Tertestrial removes this pipe when stopping.
 
   ```
   npm i -g tertestrial
+  # or
+  yarn global add tertestrial
   ```
 
 * install the [Tertestrial plugin for your editor](#editor-plugins)

circle.yml

@@ -1,14 +1,21 @@
 machine:
+  environment:
+    PATH: "${PATH}:${HOME}/${CIRCLE_PROJECT_REPONAME}/node_modules/.bin"
   node:
     version: 6.1.0
 
 
-test:
+dependencies:
+  override:
+    - yarn
+  cache_directories:
+    - ~/.cache/yarn
+
 
+test:
   pre:
     - node_modules/o-tools-livescript/bin/build
     - mkdir -p $CIRCLE_TEST_REPORTS/cucumber
-
   override:
     - node_modules/dependency-lint/bin/dependency-lint.js
     - cucumber-js --format json:$CIRCLE_TEST_REPORTS/cucumber/tests.cucumber --format pretty

features/support/given-steps.ls

@@ -38,7 +38,7 @@ defineSupportCode ({Given}) ->
   Given /^Tertestrial is running inside the "([^"]*)" example application$/, timeout: 40_000, (app-name, done) ->
     @root-dir = path.join 'example-applications', app-name
     fs.unlink path.join(@root-dir, '.tertestrial.tmp'), ~>
-      @run-process 'npm i'
+      @run-process 'yarn install'
       @start-process @tertestrial-path, done