Add support for coverage

Jenkinsfile

@@ -64,7 +64,11 @@ stage('build') {
     linux_node_debug: doDockerBuild('node Debug'),
     linux_node_release: doDockerBuild('node Release'),
     linux_test_runners: doDockerBuild('test-runners'),
-    macos_node_debug: doMacBuild('node Debug'),
+    macos_node_debug: doMacBuild('node Debug', true) {
+      withCredentials([string(credentialsId: 'codecov-token-js', variable: 'CODECOV_TOKEN')]) {
+        sh 'node_modules/.bin/codecov'
+      }
+    },
     macos_node_release: doMacBuild('node Release'),
     //macos_realmjs_debug: doMacBuild('realmjs Debug'),
     //macos_realmjs_release: doMacBuild('realmjs Release'),
@@ -172,7 +176,8 @@ def doAndroidBuild(target, postStep = null) {
   }
 }
 
-def doDockerBuild(target, postStep = null) {
+def doDockerBuild(target, coverage = false, postStep = null) {
+  def prefix = coverage?'node_modules/.bin/nyc ':''
   return {
     node('docker') {
       deleteDir()
@@ -182,7 +187,7 @@ def doDockerBuild(target, postStep = null) {
         reportStatus(target, 'PENDING', 'Build has started')
 
         docker.image('node:6').inside('-e HOME=/tmp') {
-          sh "scripts/test.sh ${target}"
+          sh "${prefix}scripts/test.sh ${target}"
           if(postStep) {
             postStep.call()
           }

package.json

@@ -49,6 +49,7 @@
     "set-version": "scripts/set-version.sh",
     "lint": "eslint",
     "test": "scripts/test.sh",
+    "test-cover": "npm install nyc && node_modules/.bin/nyc scripts/test.sh",
     "install": "node-pre-gyp install --fallback-to-build",
     "build-changes": "node-pre-gyp build --debug",
     "rebuild-changes": "node-pre-gyp rebuild --debug && cd tests && npm install",
@@ -103,7 +104,9 @@
     "rimraf": "^2.6.1",
     "semver": "^5.1.0",
     "shelljs": "^0.7.7",
-    "shx": "^0.2.2"
+    "shx": "^0.2.2",
+    "nyc": "^11.2.1",
+    "codecov": "^2.2.0"
   },
   "rnpm": {
     "ios": {