works with our existing list of types

Makefile

@@ -0,0 +1,26 @@
+ESLINT=./node_modules/.bin/eslint
+TAP=./node_modules/.bin/tap
+
+# ------------------------------------------------------------------------------
+
+start:
+	node server.js
+
+# ------------------------------------------------------------------------------
+
+lint:
+	$(ESLINT) ./*.js
+	$(ESLINT) ./lib/*.js
+	$(ESLINT) ./test/**/*.js
+
+tap-tests:
+	$(TAP) ./test/{unit,functional,integration}/*.js
+
+test:
+	@make lint
+	@make tap-tests
+
+coverage:
+	$(TAP) ./test/{unit,functional,integration}/*.js --coverage --coverage-report=lcov
+
+.PHONY: start lint test coverage load

lib/typeslist.js

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+module.exports = {
+    gif: {ext: 'gif', mime: 'image/gif'},
+    jpg: {ext: 'jpg', mime: 'image/jpg'},
+    jpm: {ext: 'jpg', mime: 'image/jpg'},
+    jpx: {ext: 'jpg', mime: 'image/jpg'},
+    jp2: {ext: 'jpg', mime: 'image/jpg'},
+    json: {ext: 'json', mime: 'application/json'},
+    mj2: {ext: 'jpg', mime: 'image/jpg'},
+    png: {ext: 'png', mime: 'image/png'},
+    webp: {ext: 'webp', mime: 'image/webp'},
+    wav: {ext: 'wav', mime: 'audio/x-mav'},
+    zip: {ext: 'zip', mime: 'application/zip'}
+};

package.json

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+{
+  "name": "scratch-asset-types",
+  "version": "1.0.0",
+  "description": "Data typing discovering and MIME content-type handling across all media types that the Scratch environment expects",
+  "repository": {
+    "type": "git",
+    "url": "git+ssh://git@github.com/LLK/scratch-asset-types.git"
+  },
+  "scripts": {
+    "test": "make test"
+  },
+  "author": "Massachusetts Institute of Technology",
+  "license": "private",
+  "devDependencies": {
+    "babel-eslint": "^8.0.3",
+    "eslint": "^4.13.1",
+    "eslint-config-scratch": "^5.0.0",
+    "read-chunk": "^2.1.0",
+    "tap": "^11.0.0"
+  }
+}

test/fixtures/test.json

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+{ "json": "I might be JSON" }

test/unit/filetype.js

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+const tap = require('tap');
+const readChunk = require('read-chunk');
+const fileType = require('../../index');
+const typesList = require('../../lib/typeslist');
+
+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);
+        t.ok(detectedType);
+        t.equals(detectedType.ext, typesList[thisType].ext);
+        t.equals(detectedType.mime, typesList[thisType].mime);
+    });
+
+    t.end();
+});