From 213400e4b2bba3efee856a25b40e269221c3c39d Mon Sep 17 00:00:00 2001
From: Daniel Gasienica <daniel@gasienica.ch>
Date: Tue, 13 Feb 2018 08:24:27 -0500
Subject: [PATCH] Add `MIME` type module

---
 js/modules/types/mime.js        |  3 +++
 test/modules/types/mime_test.js | 23 +++++++++++++++++++++++
 2 files changed, 26 insertions(+)
 create mode 100644 js/modules/types/mime.js
 create mode 100644 test/modules/types/mime_test.js

diff --git a/js/modules/types/mime.js b/js/modules/types/mime.js
new file mode 100644
index 0000000000..12ff3bb66d
--- /dev/null
+++ b/js/modules/types/mime.js
@@ -0,0 +1,3 @@
+exports.isJPEG = mimeType =>
+  mimeType === 'image/jpeg' ||
+  mimeType === 'image/jpg';
diff --git a/test/modules/types/mime_test.js b/test/modules/types/mime_test.js
new file mode 100644
index 0000000000..38be30aaec
--- /dev/null
+++ b/test/modules/types/mime_test.js
@@ -0,0 +1,23 @@
+const { assert } = require('chai');
+
+const MIME = require('../../../js/modules/types/mime');
+
+
+describe('MIME', () => {
+  describe('isJPEG', () => {
+    it('should return true for `image/jpeg`', () => {
+      assert.isTrue(MIME.isJPEG('image/jpeg'));
+    });
+
+    it('should return true for `image/jpg`', () => {
+      assert.isTrue(MIME.isJPEG('image/jpeg'));
+    });
+
+    ['image/gif', 'image/tiff', 'application/json', 0, false, null, undefined]
+      .forEach((value) => {
+        it(`should return false for \`${value}\``, () => {
+          assert.isFalse(MIME.isJPEG(value));
+        });
+      });
+  });
+});