Add linting rules, add synchronous and asynchronous checks and appropriate

tests

.eslintignore

@@ -0,0 +1,6 @@
+node_modules/*
+static/*
+build/*
+intl/*
+locales/*
+**/*.min.js

.eslintrc.js

@@ -0,0 +1,4 @@
+module.exports = {
+    extends: ['scratch', 'scratch/node','scratch/es6'],
+};
+

README.md

@@ -1 +1,7 @@
 # scratch-asset-types
+
+A library for detecting types for Scratch backend services that is optimized for the specific file types that Scratch services depend on.
+
+### Thanks to file-type
+
+This library is derived from the more general [file-type](https://www.npmjs.com/package/file-type) npm module.

index.js

@@ -3,7 +3,7 @@
 const typesList = require('./lib/typeslist');
 const readChunk = require('read-chunk');
 
-module.exports = input => {
+module.exports.bufferCheck = input => {
     const buf = (input instanceof Uint8Array) ? input : new Uint8Array(input);
 
     if (!(buf && buf.length > 1)) {
@@ -80,14 +80,13 @@ module.exports = input => {
     return null;
 };
 
-module.exports.async = (fileName) => {
-    return new Promise(function(resolve, reject) {
-        const chunkPromise = readChunk(fileName, 0, 128);
-        chunkPromise.then(function(result) {
-            resolve(module.exports(result));
-        }, function(err) {
-            reject(err);
-        });
+module.exports.asyncCheck = fileName => new Promise((resolve, reject) => {
+    const chunkPromise = readChunk(fileName, 0, 128);
+    chunkPromise.then(result => {
+        resolve(module.exports.bufferCheck(result));
+    }, err => {
+        reject(err);
     });
-};
+});
 
+module.exports.syncCheck = fileName => module.exports.bufferCheck(readChunk.sync(fileName, 0, 128));

package-lock.json

@@ -871,11 +871,6 @@
         "object-assign": "4.1.1"
       }
     },
-    "file-type": {
-      "version": "7.4.0",
-      "resolved": "https://registry.npmjs.org/file-type/-/file-type-7.4.0.tgz",
-      "integrity": "sha1-KnyU9ioAMBULt9m2xwz6HT51nIY="
-    },
     "flat-cache": {
       "version": "1.3.0",
       "resolved": "https://registry.npmjs.org/flat-cache/-/flat-cache-1.3.0.tgz",

package.json

@@ -15,7 +15,9 @@
     "babel-eslint": "^8.0.3",
     "eslint": "^4.13.1",
     "eslint-config-scratch": "^5.0.0",
-    "read-chunk": "^2.1.0",
     "tap": "^11.0.0"
+  },
+  "dependencies": {
+    "read-chunk": "^2.1.0"
   }
 }

test/unit/filetype.js

@@ -1,5 +1,4 @@
 const tap = require('tap');
-const readChunk = require('read-chunk');
 const fileType = require('../../index');
 const typesList = require('../../lib/typeslist');
 
@@ -7,10 +6,8 @@ const checkList = [
     'gif', 'jpg', 'json', 'png', 'webp', 'zip'];
 
 tap.test('check-types', t => {
-
     checkList.forEach(thisType => {
-        const buffer = readChunk.sync(`./test/fixtures/test.${thisType}`, 0, 128);
-        const detectedType = fileType(buffer);
+        const detectedType = fileType.syncCheck(`./test/fixtures/test.${thisType}`);
         t.ok(detectedType);
         t.equals(detectedType.ext, typesList[thisType].ext);
         t.equals(detectedType.mime, typesList[thisType].mime);
@@ -18,3 +15,11 @@ tap.test('check-types', t => {
 
     t.end();
 });
+
+checkList.forEach(thisType => fileType.asyncCheck(`./test/fixtures/test.${thisType}`)
+    .then(result => tap.test('check async results', t => {
+        t.ok(result);
+        t.equals(result.ext, typesList[thisType].ext);
+        t.equals(result.mime, typesList[thisType].mime);
+        t.end();
+    })));