add lint-staged - lint and test

docs/tests.md

@@ -16,6 +16,14 @@ To fix formatting and other auto-fixable eslint errors,
 yarn fix
 ```
 
+## Check Staged Files
+
+Lint and Test staged files
+
+```sh
+yarn lint-staged
+```
+
 ## Test
 
 To run all tests,

package.json

@@ -44,6 +44,7 @@
     "jest-cli": "^22.0.3",
     "lerna": "^2.5.1",
     "lerna-changelog": "^0.7.0",
+    "lint-staged": "^6.0.1",
     "markdown-table": "^1.1.1",
     "minimist": "^1.2.0",
     "prettier": "^1.9.2",
@@ -76,6 +77,13 @@
       "/lib/"
     ]
   },
+  "lint-staged": {
+    "*.js": [
+      "eslint --fix",
+      "./scripts/test-files.sh",
+      "git add"
+    ]
+  },
   "workspaces": [
     "packages/*",
     "utils/*"

scripts/test-files.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+cd $DIR/..
+
+normalize() {
+  node -e "console.log(require('path').normalize('$1'))"
+}
+
+PACKAGES_DIR=$(normalize $(pwd)/packages/)
+
+FILES=""
+
+for _file in $@; do
+  file=$(normalize $_file)
+  if [[ "${file##${PACKAGES_DIR}}" != "$file" ]]; then
+    FILES="$FILES $(dirname $(dirname $file))"
+  fi
+done
+
+yarn test --passWithNoTests $FILES