Migrate tests to Ava

.babelrc

@@ -0,0 +1,12 @@
+{
+  "presets": [
+    ["@babel/preset-env", {
+      "targets": {
+        "node": "4"
+      },
+      "exclude": [
+        "transform-regenerator"
+      ]
+    }]
+  ]
+}

.gitignore

@@ -16,6 +16,7 @@ lib-cov
 
 # Coverage directory used by tools like istanbul
 coverage
+.nyc_output
 
 # Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
 .grunt
@@ -82,5 +83,3 @@ $RECYCLE.BIN/
 
 ### Custom ###
 dist/
-test/output/
-test/stream

.nycrc

@@ -0,0 +1,6 @@
+{
+  "reporter": [
+    "lcov",
+    "text"
+  ]
+}

.travis.yml

@@ -12,3 +12,16 @@ node_js:
 os:
 - linux
 - osx
+
+jobs:
+  include:
+  - stage: test
+    os: linux
+    node_js: node
+    script: travis_retry npm run coverage
+    after_success:
+    - travis_retry npm install coveralls
+    - cat ./coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js
+
+before_install:
+- travis_retry npm install -g npm@latest

gulpfile.js

@@ -3,18 +3,7 @@ var gulp   = require('gulp'),
 
 gulp.task('default', () => Promise.all([
     gulp.src(['src/index.js', 'src/helpers.js'])
-    .pipe(babel({
-        presets: [
-            ['env', {
-                targets: {
-                    node: "4"
-                },
-                exclude: [
-                    'transform-regenerator'
-                ]
-            }]
-        ]
-    }))
+    .pipe(babel())
     .pipe(gulp.dest('dist/')),
 
     gulp.src(['src/mask.png', 'src/overlay.png'])